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Proposal of an experimental data and image transmission system and its possible application for remote monitoring smart grids
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Hallad, Nagaraj R. Banapurmath, Anand M. Hunashyal, Ashok S. Shettar, Narasimha H. Ayachit, Mruthunjaya A.K., Lohit R.B., Manjunath Uttur" "autores" => array:8 [ 0 => array:2 [ "nombre" => "Shankar A." "apellidos" => "Hallad" ] 1 => array:2 [ "nombre" => "Nagaraj R." "apellidos" => "Banapurmath" ] 2 => array:2 [ "nombre" => "Anand M." "apellidos" => "Hunashyal" ] 3 => array:2 [ "nombre" => "Ashok S." "apellidos" => "Shettar" ] 4 => array:2 [ "nombre" => "Narasimha H." "apellidos" => "Ayachit" ] 5 => array:2 [ "nombre" => "Mruthunjaya" "apellidos" => "A.K." ] 6 => array:2 [ "nombre" => "Lohit" "apellidos" => "R.B." ] 7 => array:2 [ "nombre" => "Manjunath" "apellidos" => "Uttur" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1665642317300457?idApp=UINPBA00004N" "url" => "/16656423/0000001500000003/v1_201706230112/S1665642317300457/v1_201706230112/en/main.assets" ] "en" => array:20 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Original</span>" "titulo" => "Proposal of an experimental data and image transmission system and its possible application for remote monitoring smart grids" "tieneTextoCompleto" => true "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "303" "paginaFinal" => "310" ] ] "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Ibrahim Develi, Yasin Kabalci" "autores" => array:2 [ 0 => array:4 [ "nombre" => "Ibrahim" "apellidos" => "Develi" "email" => array:1 [ 0 => "develi@erciyes.edu.tr" ] "referencia" => array:2 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor0005" ] ] ] 1 => array:3 [ "nombre" => "Yasin" "apellidos" => "Kabalci" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff0010" ] ] ] ] "afiliaciones" => array:2 [ 0 => array:3 [ "entidad" => "Department of Electrical & Electronics Engineering, Faculty of Engineering, Erciyes University, 38039, Kayseri, Turkey" "etiqueta" => "a" "identificador" => "aff0005" ] 1 => array:3 [ "entidad" => "Department of Electronics and Automation, Nigde Vocational College of Technical Sciences, Nigde University, 51200, Nigde, Turkey" "etiqueta" => "b" "identificador" => "aff0010" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "Corresponding author." ] ] ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0030" "etiqueta" => "Fig. 6" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr6.jpeg" "Alto" => 2534 "Ancho" => 2833 "Tamanyo" => 549173 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Comparison of uncoded and QC-LDPC coded OFDM systems for different images in PLC channels ((a), (b) and (c) present QC-LDPC code performances; (d), (e) and (f) show uncoded cases).</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">1</span><span class="elsevierStyleSectionTitle" id="sect0015">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">The rapidly decreasing reserves of fossil fuels and environmental considerations are currently compelling researchers to discover efficient alternative energy sources. The renewable energy source (RES) is a widespread concept covering wind energy, solar energy, biomass, geothermal, and tidal wave energies which are believed to have the ability to tackle our dependency on fossil fuels. Extensive studies about electrical energy generation by using RESs have been performed by numerous research laboratories and scientists (<a class="elsevierStyleCrossRef" href="#bib0120">Fu et al., 2014</a>; <a class="elsevierStyleCrossRef" href="#bib0070">Jain & Agarwal, 2008</a>; <a class="elsevierStyleCrossRef" href="#bib0085">Kabalci, Kabalci, & Develi, 2012</a>; <a class="elsevierStyleCrossRef" href="#bib0095">Liserre, Sauter, & Hung, 2010</a><a class="elsevierStyleCrossRefs" href="#bib0110">; Nehrir et al., 2011; Spagnuolo et al., 2010</a>; <a class="elsevierStyleCrossRef" href="#bib0155">Yu, Zhang, Xiao, & Choudhury, 2011</a>). At present, RESs are assumed as alternative energy sources to fuels, and they can be easily integrated into currently used grid infrastructures. Since an energy plant that is based on RES needs to permanently supply the electrical loads as well as the conventional grid, standalone renewable energy plants are assisted with battery and energy storage systems.</p><p id="par0010" class="elsevierStylePara elsevierViewall">Distributed energy sources (DES) are suggested as a solution to energy demands by interconnecting several different energy sources together. A robust microgrid structure that is constituted from various energy sources should be able to be easily connected to and disconnected from the conventional grid; this requirement means the integration capability of any additional source connection to the existing distributed generation system without requiring any system configuration (<a class="elsevierStyleCrossRefs" href="#bib0125">Spagnuolo et al., 2010; Yu et al., 2011</a>). The monitoring and metering requirements of microgrid networks should be met as well as conducted in conventional grids. Although several measuring methods have been proposed such as wired or wireless, all the solutions are related to the smart grid concept that has been extensively researched (<a class="elsevierStyleCrossRef" href="#bib0055">Gungor et al., 2011</a>; <a class="elsevierStyleCrossRef" href="#bib0075">Matanza, Alexandres, & Rodríguez-Morcillo, 2014</a>; <a class="elsevierStyleCrossRef" href="#bib0135">Sung & Hsu, 2013</a>; <a class="elsevierStyleCrossRef" href="#bib0060">Wen, Wang, Zhu, Li, & Zhou, 2013</a>; <a class="elsevierStyleCrossRef" href="#bib0145">Yan, Qian, Sharif, & Tipper, 2013</a>). The smart grid should meet the remote sensing, communication, controlling, monitoring and analysis demands in a sustainable, secure and efficient way to manage the entire infrastructure. Smart grid applications are widely used in the phase measurement, advanced metering and remote monitoring of source and load amplitudes (<a class="elsevierStyleCrossRef" href="#bib0050">Galli, Scaglione, & Wang, 2010</a>; <a class="elsevierStyleCrossRefs" href="#bib0055">Gungor et al., 2011; Kabalci et al., 2012; Matanza et al., 2014</a>; <a class="elsevierStyleCrossRef" href="#bib0135">Sung & Hsu, 2013</a>; <a class="elsevierStyleCrossRefs" href="#bib0145">Yan et al., 2013; Yu et al., 2011</a>).</p><p id="par0015" class="elsevierStylePara elsevierViewall">The type of communication medium preferred in smart grids is wired or wireless because of environmental and substructural factors. Wireless communication systems are standardized to wireless home area networks (HAN) and wireless wide area networks (WAN). Besides these standard networks, business area networks (BANs) and neighborhood area networks (NANs) have also been proposed by several researchers and alliances. The HAN standards are implemented and operated by ZigBee alliance and Wi-Fi alliance which include the global system for mobile communications (GSM), ZigBee, Wi-Fi, and the general packet radio service (GPRS), while the WAN standards cover WiMax that is based on IEEE 802.16 standard (<a class="elsevierStyleCrossRefs" href="#bib0055">Gungor et al., 2011; Yan et al., 2013; Yu et al., 2011</a>). Although wireless communication seems to be the most convenient method to transfer information and control data, the required infrastructure greatly increases the installation costs. Furthermore, the destructive effects of the communication medium decrease the sustainability and security of data transfer in wireless communication. An alternative method to transmit measured data is to use electrical power lines as a transmission medium; this concept is defined as power line communication (PLC). PLC is considered as a promising technology in smart grids because of its eliminating the additional costs of wireless and other wire line communication methods (<a class="elsevierStyleCrossRef" href="#bib0050">Galli et al., 2010</a>), and owing to its high-speed data rates of up to 200 Megabits per second (Mbps). Moreover, PLC can be used in industrial, indoor, and outdoor applications thanks to its various communication bands that are called broadband (BB) and narrowband (NB) (<a class="elsevierStyleCrossRefs" href="#bib0050">Galli et al., 2010; Gungor et al., 2011; Yan et al., 2013</a>). NB PLC systems operate below 500<span class="elsevierStyleHsp" style=""></span>kHz band according to CENELEC, FCC or ARIB standards and generally utilize single carrier systems. On the other hand, BB PLC systems run between the band range of 1–30<span class="elsevierStyleHsp" style=""></span>MHz and exploit multi carrier systems such as orthogonal frequency-division multiplexing (OFDM), and especially coded OFDM. Recently reported studies in the literature showed that the low-density parity-check (LDPC) code is the best solution for the channel coding process in PLC systems (<a class="elsevierStyleCrossRef" href="#bib0010">Andreadou & Pavlidou, 2010</a>; <a class="elsevierStyleCrossRef" href="#bib0005">Andreadou, Assimakopoulos, & Pavlidou, 2007</a>; <a class="elsevierStyleCrossRef" href="#bib0105">Nakagawa, Umehara, Denno, & Morihiro, 2005</a>; <a class="elsevierStyleCrossRefs" href="#bib0130">Spencer, 2005; Wada, 2004</a>). The authors in (<a class="elsevierStyleCrossRef" href="#bib0005">Andreadou et al., 2007</a>) aimed to compare LDPC code performance with Reed-Solomon and Convolutional codes over the PLC channels and they showed that LDPC codes perform better than other codes. In <a class="elsevierStyleCrossRef" href="#bib0105">Nakagawa et al. (2005)</a>, the authors searched for a way to improve the decoding process of LDPC codes over PLC channels with impulsive noise. The performance of high rate and short-block LDPC codes in low bandwidth PLC systems is considered in <a class="elsevierStyleCrossRef" href="#bib0130">Spencer (2005)</a>. The authors in <a class="elsevierStyleCrossRef" href="#bib0140">Wada (2004)</a> showed that the performance of LDPC codes is also better than that of Turbo codes in PLC channels. The performance of irregular quasi-cyclic (QC) LDPC codes over a statistical PLC channel model with highly impulsive noise is examined in <a class="elsevierStyleCrossRef" href="#bib0010">Andreadou and Pavlidou (2010)</a>.</p><p id="par0020" class="elsevierStylePara elsevierViewall">In previous studies (<a class="elsevierStyleCrossRef" href="#bib0025">Develi & Kabalci, 2014a</a>; <a class="elsevierStyleCrossRef" href="#bib0090">Kabalci, Develi, & Kabalci, 2013</a>), we have examined bit error rate (BER) performances of LDPC coded OFDM systems over Canete's PLC channel model and aimed to show superiority of LDPC codes among others in PLC channels. In <a class="elsevierStyleCrossRef" href="#bib0030">Develi and Kabalci (2014b)</a>, effect of using different decoding schemes on the LDPC coded OFDM systems over indoor PLC channels was analyzed. In addition to these works, an image transmission system for smart grids was also proposed in (<a class="elsevierStyleCrossRef" href="#bib0035">Develi, Kabalci, & Basturk, 2014</a>). Furthermore, a PLC channel model proposal that is based on practical channel measurements acquired from electrical networks in Turkey was reported in <a class="elsevierStyleCrossRef" href="#bib0040">Develi, Kabalci, and Basturk (2015)</a>.</p><p id="par0025" class="elsevierStylePara elsevierViewall">This paper presents investigation of the QC-LDPC coded OFDM system performances over a practical PLC channel in contrast to previous studies reported in the literature. To obtain a realistic PLC channel medium, long-term measurements were carried out in Nigde Vocational College of Technical Sciences, Turkey. The simulation results were obtained by varying the code rate, block length and iteration numbers of the QC-LDPC codes over the generated PLC channel. Furthermore, the simulations were not only completed by transmitting randomly generated data, but were also carried out for the transmission of different images such as <span class="elsevierStyleItalic">lenna</span>, <span class="elsevierStyleItalic">cameraman</span> and <span class="elsevierStyleItalic">baboon</span> which are widely used for performance evaluation and comparison in the literature. As a result, it was confirmed that the QC-LDPC coded OFDM system, in which performance was analyzed in a real PLC channel, can be utilized in smart grids for communication and remote monitoring purposes in a reliable way.</p><p id="par0030" class="elsevierStylePara elsevierViewall">The rest of this paper is organized as follows: Section <a class="elsevierStyleCrossRef" href="#sec0010">2</a> describes the QC-LDPC codes, the OFDM system principles and system model. The PLC channel measurement system is explained in Section <a class="elsevierStyleCrossRef" href="#sec0025">3</a>. Finally, the simulation results and conclusions are given in Sections <a class="elsevierStyleCrossRefs" href="#sec0030">4 and 5</a>, respectively.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">2</span><span class="elsevierStyleSectionTitle" id="sect0020">System model</span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">2.1</span><span class="elsevierStyleSectionTitle" id="sect0025">LDPC and QC-LDPC codes</span><p id="par0035" class="elsevierStylePara elsevierViewall">LDPC codes are robust error correcting codes and are a special type of linear block code (<a class="elsevierStyleCrossRef" href="#bib0045">Gallager, 1963</a>). A sparse matrix, called parity-check matrix <span class="elsevierStyleBold">H</span>, is exploited to define these codes. When an n,k LDPC code is considered, <span class="elsevierStyleItalic">k</span> denotes information bits and <span class="elsevierStyleItalic">n</span> represents coded bits with an r=k/n code rate. In addition, the dimensions of the parity-check matrix <span class="elsevierStyleBold">H</span> are shown by n−k×n. LDPC codes have some advantages, such as a simple coding process, parallel and iterative decoding operations and good performance when they are compared with Reed-Solomon, Convolutional or Turbo codes. Because of their high performance and low decoding complexity compared to other channel coding schemes, LDPC codes have been exploited in most modern communication systems such as DVB-S2/-T2/-C2, 802.11n (Wi-Fi), 802.16e (WiMAX), IEEE802.3an (10Gbit Ethernet) and G.hn/G.9960.</p><p id="par0040" class="elsevierStylePara elsevierViewall">QC-LDPC codes, which are a special type of LDPC code, offer a simple encoding process and better error correcting performance. These codes utilize the shifting method to decrease encoding complexity. In addition, they can be easily implemented because of their cyclic characteristic (<a class="elsevierStyleCrossRef" href="#bib0100">Myung, Yang, & Kim, 2005</a>). A parity-check matrix that comprises sub-matrices called zero or circulant permutation matrices defines a binary QC-LDPC code. A permutation matrix <span class="elsevierStyleBold">P</span><span class="elsevierStyleSup"><span class="elsevierStyleItalic">i</span></span> of size L×L is given with <a class="elsevierStyleCrossRef" href="#eq0005">(1)</a>.<elsevierMultimedia ident="eq0005"></elsevierMultimedia></p><p id="par0045" class="elsevierStylePara elsevierViewall">It is important to note that the circulant permutation matrix <span class="elsevierStyleBold">P</span><span class="elsevierStyleSup"><span class="elsevierStyleItalic">i</span></span> shifts the identity matrix <span class="elsevierStyleBold">I</span><span class="elsevierStyleItalic">i</span> times to the right as long as the 0≤i<L condition is true. Finally, the parity-check matrix <span class="elsevierStyleBold">H</span> of size mL×nL is given as (<a class="elsevierStyleCrossRef" href="#bib0100">Myung et al., 2005</a>)<elsevierMultimedia ident="eq0010"></elsevierMultimedia>where aij∈0,1,…,L−1,∞, 1≤i<m and 1≤j<n.</p><p id="par0055" class="elsevierStylePara elsevierViewall">On the other hand, the decoding process of the QC-LDPC codes can be performed by using soft- and hard-decision decoder schemes similar to LDPC codes (<a class="elsevierStyleCrossRef" href="#bib0020">Chen, Dholakia, Eleftheriou, Fossorier, & Hu, 2005</a>; <a class="elsevierStyleCrossRef" href="#bib0045">Gallager, 1963</a>; <a class="elsevierStyleCrossRef" href="#bib0080">Jiang, Peng, Song, Pan, & Yang, 2009</a>; <a class="elsevierStyleCrossRef" href="#bib0115">Phakphisut, Supnithi, Sopon, & Myint, 2011</a>; <a class="elsevierStyleCrossRef" href="#bib0160">Zhong, Xu, Xie, & Zhang, 2007</a>). Although hard decision decoders have the advantage of low complexity, they always exhibit lower performance than that of soft decision decoders. The most commonly used soft-decision decoder is the Belief Propagation (BP) decoder (<a class="elsevierStyleCrossRef" href="#bib0020">Chen et al., 2005</a>) that performs the decoding process in an iterative way; it is also utilized in this study for the decoding process.</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">2.2</span><span class="elsevierStyleSectionTitle" id="sect0030">QC-LDPC coded OFDM system design for monitoring energy systems</span><p id="par0060" class="elsevierStylePara elsevierViewall">Orthogonal frequency-division multiplexing (OFDM) (<a class="elsevierStyleCrossRef" href="#bib0015">Chang, 1966</a>) is a transmission method which, as the name implies, utilizes more than one orthogonal carrier. An OFDM system consists of both modulation and multiplexing infrastructures (<a class="elsevierStyleCrossRef" href="#bib0015">Chang, 1966</a>; <a class="elsevierStyleCrossRef" href="#bib0065">Hwang, Yang, Wu, Li, & Li, 2009</a>; <a class="elsevierStyleCrossRef" href="#bib0150">Wu & Zou, 1995</a>; <a class="elsevierStyleCrossRef" href="#bib0165">Zou & Wu, 1995</a>). The most advantageous properties of the OFDM are bandwidth efficiency and its robust structure against channel fading. Inter Symbol Interference (ISI) has attracted the attention of researchers and caused it to be widely researched. The system can divide a frequency selective channel into several sub-channels with parallel fading properties that require proportionately simple processes for channel equalization. Several standards such as asymmetric digital subscriber lines (ADSL), very high-bit-rate digital subscriber lines (VDSL), digital television, radio broadcasting and wireless local area networks (WLAN) systems currently use OFDM systems.</p><p id="par0065" class="elsevierStylePara elsevierViewall">A block diagram of the proposed system for monitoring smart grids through power line communication is given in <a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>. As can be seen from the figure, the communication infrastructure of the monitoring system is based on QC-LDPC coded OFDM modems. To show the efficiency of the monitoring system, the performance of the QC-LDPC coded OFDM modem is tested by using digital data and <span class="elsevierStyleItalic">lenna</span>, <span class="elsevierStyleItalic">cameraman</span> and <span class="elsevierStyleItalic">baboon</span> images with 256<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>256 pixels. As mentioned before, these images are selected since they are widely used for the comparison of system performance in the literature. The transmission of image processing by using the QC-LDPC coded OFDM system over a PLC channel can be summarized briefly as follows.</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0070" class="elsevierStylePara elsevierViewall">Firstly, the LDPC encoder involves properly adjusted image data as the input. Hence, the pixels of the pattern image are converted to 8-bit grayscale digital data before being applied to the encoder. The initial block of the transmitter, the LDPC encoder, executes the channel-coding process for message bits that are transferred to the modulation process to map the encoded data stream. Afterwards, pilot symbols are integrated into the modulated data in order to obtain a precise estimation on the receiver side. In the following step, the parallel data that are generated by being converted from serial data are transferred to the inverse fast Fourier transform (IFFT) process where OFDM signals are generated in the time domain. The ISI effect is eliminated by adding a guard interval to the OFDM signals by cyclic prefixes. The parallel data are converted to serial data that are prepared for application to practical PLC channels at the back-end of the cyclic prefix insertion process.</p><p id="par0075" class="elsevierStylePara elsevierViewall">The receiver part of the entire system starts after the PLC channels. The received data are firstly converted to parallel type and then are applied to the fast Fourier transform (FFT) processing by removing the guard interval. The output of the FFT process is again converted to serial data and then channel estimation and pilot symbol removing processes are applied to the serial data in the frequency domain. The demodulation and LDPC decoding processes configure the last step of the receiver side. The overall performance of the system is detected by comparing the peak signal-to-noise ratio (PSNR) of the transmitted and received image. The PSNR method that is widely used to detect image quality involves the calculation of the mean square error (MSE) as seen in <a class="elsevierStyleCrossRef" href="#eq0015">(3)</a><elsevierMultimedia ident="eq0015"></elsevierMultimedia>where x×y defines the image size, and <span class="elsevierStyleItalic">S</span> and <span class="elsevierStyleItalic">R</span> stand for the transmitted and received image pixel values in binary form, respectively. On the other hand, the PSNR value can be defined by using the MSE as given below<elsevierMultimedia ident="eq0020"></elsevierMultimedia>where <span class="elsevierStyleItalic">MAX</span> depicts the maximum pixel value of the image. Since each of the pixels is converted to 8-bit data, the <span class="elsevierStyleItalic">MAX</span> value is set to 256 in this study.</p></span></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">3</span><span class="elsevierStyleSectionTitle" id="sect0035">PLC channel measurement system</span><p id="par0090" class="elsevierStylePara elsevierViewall">The power line communication (PLC) measurement studies were carried out between 500<span class="elsevierStyleHsp" style=""></span>kHz and 30<span class="elsevierStyleHsp" style=""></span>MHz by installing the measurement testbed at Nigde Vocational College of Technical Sciences, Turkey. The practical measurement system used to acquire the characteristics of the power lines is illustrated in <a class="elsevierStyleCrossRef" href="#fig0010">Fig. 2</a>. As can be seen from the figure, secure measurement is performed owing to the coupling circuit that eliminates possible damages by electrically isolating the measurement system from the grid and severe loads connected to and disconnected from the grid. The measurement meter that is connected over coupling circuits provides reliability of measurement by obtaining the instant changes in the power line channel in terms of frequency domain.</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0095" class="elsevierStylePara elsevierViewall">Because the instant data acquisitions yield similar results to the scenario of an actual power line channel, the measurement processes are carried out for long lasting periods; for example, a period indicates 24<span class="elsevierStyleHsp" style=""></span>h, and a long-term measurement takes two months. The instant measurements are transmitted to the computer and are saved as master files. <a class="elsevierStyleCrossRef" href="#fig0015">Fig. 3</a> depicts the performed measurements and the average frequency response of the channel, <span class="elsevierStyleItalic">H</span>(<span class="elsevierStyleItalic">f</span>), versus frequency <span class="elsevierStyleItalic">f</span>. When the measurements acquired from the practical power lines are analyzed, the daily variations of the PLC channel are observed within certain limits. The average value of the PLC channel, shown by the red curve in <a class="elsevierStyleCrossRef" href="#fig0015">Fig. 3</a>, is calculated and considered as a PLC channel medium in this study.</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">4</span><span class="elsevierStyleSectionTitle" id="sect0040">Results and discussion</span><p id="par0100" class="elsevierStylePara elsevierViewall">In this section, we investigate the performance of QC-LDPC coded OFDM systems over a PLC channel obtained with practical measurements in terms of data and image transmission. In order to perform a comprehensive analysis, ten different-length QC-LDPC codes with various code rates were examined through computer simulations. <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a> gives the code rates and code lengths utilized in this study. In addition, a BP decoder scheme is preferred on the receiver of the modeled communication system because of its good performance and the maximum iteration number of the decoder was set to 10 and 50 for the data and image transmission process, respectively. While the performance results for data transfer are presented in <a class="elsevierStyleCrossRefs" href="#fig0020">Figs. 4 and 5</a>, the results for image transmission over a practical PLC channel are illustrated in <a class="elsevierStyleCrossRef" href="#fig0030">Fig. 6</a>.</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="fig0020"></elsevierMultimedia><elsevierMultimedia ident="fig0025"></elsevierMultimedia><elsevierMultimedia ident="fig0030"></elsevierMultimedia><p id="par0105" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#fig0020">Fig. 4</a> shows the Bit Error Rate (BER) performances of the OFDM system versus signal-to-noise ratio (Eb/N0) when the system is encoded by using short-length QC-LDPC codes. It is clearly seen from <a class="elsevierStyleCrossRef" href="#fig0020">Fig. 4</a> that the BER performance of the OFDM system is highly increased when QC-LDPC codes are employed. When high-density codes are compared with the uncoded case, the improvement offered by the 900,600 code is nearly 6.25<span class="elsevierStyleHsp" style=""></span>dB while the 900,750 code provides 4<span class="elsevierStyleHsp" style=""></span>dB better performance for a BER level of 10<span class="elsevierStyleSup">−2</span>. In addition, the QC-LDPC code with a 1/4 rate provides approximately 11.4<span class="elsevierStyleHsp" style=""></span>dB improvement at the BER level of 10<span class="elsevierStyleSup">−2</span>.</p><p id="par0110" class="elsevierStylePara elsevierViewall">The BER performance results of the QC-LDPC coded OFDM system obtained by using long-length codes are illustrated in <a class="elsevierStyleCrossRef" href="#fig0025">Fig. 5</a>. It is observed that, when the uncoded system is considered, about 15<span class="elsevierStyleHsp" style=""></span>dB is needed for a BER value of 10<span class="elsevierStyleSup">−2</span>. However, the similar performance with 2/3 and 5/6 rate QC-LDPC codes are presented at Eb/N0≈8.1 dB and Eb/N0≈10.4 dB, respectively.</p><p id="par0115" class="elsevierStylePara elsevierViewall">In cases where the 1/3 and 1/2 rate QC-LDPC codes are utilized instead of high-density codes, the achieved gains with respect to the uncoded case by these codes are 10.75<span class="elsevierStyleHsp" style=""></span>dB and 9<span class="elsevierStyleHsp" style=""></span>dB at a BER level of 10<span class="elsevierStyleSup">−2</span>, respectively. In addition, when the 1/4 rate code is used, about 6<span class="elsevierStyleHsp" style=""></span>dB is required for a BER value of 10<span class="elsevierStyleSup">−5</span>. Finally, we can see from <a class="elsevierStyleCrossRefs" href="#fig0020">Figs. 4 and 5</a> that long-length QC-LDPC codes provide nearly 0.75<span class="elsevierStyleHsp" style=""></span>dB better performance than that of the short-length codes in high rates.</p><p id="par0120" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#fig0030">Fig. 6</a> indicates the image transmission results for the QC-LDPC coded OFDM system with the 1800,600 code over the PLC channel. When the coded system results shown in <a class="elsevierStyleCrossRef" href="#fig0030">Fig. 6</a>a-c are compared with the uncoded cases depicted in <a class="elsevierStyleCrossRef" href="#fig0030">Fig. 6</a>d-f, the PSNR value of 24.75<span class="elsevierStyleHsp" style=""></span>dB is obtained at a 26<span class="elsevierStyleHsp" style=""></span>dB SNR value in the uncoded OFDM system, while nearly the same PSNR performance can be achieved at a lower SNR value such as 4<span class="elsevierStyleHsp" style=""></span>dB in the coded system for the <span class="elsevierStyleItalic">lenna</span> image. In the event of the <span class="elsevierStyleItalic">cameraman</span> image results for the same QC-LDPC code presented in <a class="elsevierStyleCrossRef" href="#fig0030">Fig. 6</a> are analyzed, it is shown that about 28<span class="elsevierStyleHsp" style=""></span>dB SNR is needed for a medium quality image transmission with a 31.86 PSNR value in the uncoded system. However, better performance is provided at the 6<span class="elsevierStyleHsp" style=""></span>dB SNR value in the coded OFDM system. When the transmission results for the <span class="elsevierStyleItalic">baboon</span> images using 1/3 rate and long-length QC-LDPC codes are considered, it is clearly seen from <a class="elsevierStyleCrossRef" href="#fig0030">Fig. 6</a> that very high quality image transmission can be obtained at the SNR value of 8<span class="elsevierStyleHsp" style=""></span>dB and an extremely high PSNR value of 61.07<span class="elsevierStyleHsp" style=""></span>dB owing to the coded OFDM system.</p><p id="par0125" class="elsevierStylePara elsevierViewall">As a final remark, all of the simulation results show that QC-LDPC codes provide significant improvement in terms of data and image transmission over the practical PLC channel. In addition, the results obtained confirm that the QC-LDPC coded OFDM system can be utilized in smart grids for remote monitoring energy systems.</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">5</span><span class="elsevierStyleSectionTitle" id="sect0045">Conclusion</span><p id="par0130" class="elsevierStylePara elsevierViewall">This paper investigated the performance of QC-LDPC coded OFDM systems for both data and image transmission using practical PLC channel conditions. The long-term PLC channel measurements were carried out to obtain an actual channel model. In order to realize a comprehensive analysis, the simulation studies examined both different code lengths and code rates. All of the simulation results achieved over the actual PLC channel show that the QC-LDPC codes ensure considerable improvement in terms of data and image transmission performance. The results of this study also emphasize that the QC-LDPC coded OFDM system tested in an actual PLC channel can be reliably utilized in smart grids for communication and remote monitoring purposes.</p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conflicts of interest</span><p id="par0135" class="elsevierStylePara elsevierViewall">The authors have no conflicts of interest to declare.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:10 [ 0 => array:3 [ "identificador" => "xres856069" "titulo" => "Abstract" "secciones" => array:1 [ 0 => array:1 [ "identificador" => "abst0005" ] ] ] 1 => array:2 [ "identificador" => "xpalclavsec850139" "titulo" => "Keywords" ] 2 => array:2 [ "identificador" => "sec0005" "titulo" => "Introduction" ] 3 => array:3 [ "identificador" => "sec0010" "titulo" => "System model" "secciones" => array:2 [ 0 => array:2 [ "identificador" => "sec0015" "titulo" => "LDPC and QC-LDPC codes" ] 1 => array:2 [ "identificador" => "sec0020" "titulo" => "QC-LDPC coded OFDM system design for monitoring energy systems" ] ] ] 4 => array:2 [ "identificador" => "sec0025" "titulo" => "PLC channel measurement system" ] 5 => array:2 [ "identificador" => "sec0030" "titulo" => "Results and discussion" ] 6 => array:2 [ "identificador" => "sec0035" "titulo" => "Conclusion" ] 7 => array:2 [ "identificador" => "sec0040" "titulo" => "Conflicts of interest" ] 8 => array:2 [ "identificador" => "xack287103" "titulo" => "Acknowledgements" ] 9 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2015-07-14" "fechaAceptado" => "2017-03-27" "PalabrasClave" => array:1 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec850139" "palabras" => array:5 [ 0 => "Smart grids" 1 => "Remote monitoring" 2 => "Power line communication (PLC)" 3 => "Quasi-cyclic low-density parity-check (QC-LDPC) codes" 4 => "Orthogonal frequency-division multiplexing (OFDM)" ] ] ] ] "tieneResumen" => true "resumen" => array:1 [ "en" => array:2 [ "titulo" => "Abstract" "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">This paper investigates the bit error rate (BER) and the peak signal-to-noise ratio (PSNR) performances of quasi-cyclic low-density parity-check (QC-LDPC) coded orthogonal frequency-division multiplexing (OFDM) systems over an actual power line communication (PLC) channel that are acquired by performing very long-term experimental measurements from the grid. The examined system is tested by changing system parameters such as code length, iteration number, coding rate and message type in detail. The results of this study show that the QC-LDPC coded OFDM system can be a possible solution for communication and remote monitoring purposes in smart grids.</p></span>" ] ] "NotaPie" => array:1 [ 0 => array:1 [ "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Peer Review under the responsibility of Universidad Nacional Autónoma de México.</p>" ] ] "multimedia" => array:11 [ 0 => array:7 [ "identificador" => "fig0005" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 2250 "Ancho" => 3166 "Tamanyo" => 356442 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Block diagram of the QC-LDPC coded OFDM systems for monitoring energy systems through power line communication.</p>" ] ] 1 => array:7 [ "identificador" => "fig0010" "etiqueta" => "Fig. 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 1604 "Ancho" => 2499 "Tamanyo" => 313070 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Practical measurement system used to acquire characteristics of power lines.</p>" ] ] 2 => array:7 [ "identificador" => "fig0015" "etiqueta" => "Fig. 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 1480 "Ancho" => 1679 "Tamanyo" => 187479 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">PLC channel frequency responses measured in Nigde Vocational College of Technical Sciences, Turkey.</p>" ] ] 3 => array:7 [ "identificador" => "fig0020" "etiqueta" => "Fig. 4" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr4.jpeg" "Alto" => 1553 "Ancho" => 1680 "Tamanyo" => 124217 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">BER performances of OFDM systems encoded with short-length QC-LDPC codes over a realistic PLC channel.</p>" ] ] 4 => array:7 [ "identificador" => "fig0025" "etiqueta" => "Fig. 5" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr5.jpeg" "Alto" => 1522 "Ancho" => 1679 "Tamanyo" => 119277 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">BER performance results of OFDM systems over a realistic PLC channel with long-length QC-LDPC codes.</p>" ] ] 5 => array:7 [ "identificador" => "fig0030" "etiqueta" => "Fig. 6" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr6.jpeg" "Alto" => 2534 "Ancho" => 2833 "Tamanyo" => 549173 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Comparison of uncoded and QC-LDPC coded OFDM systems for different images in PLC channels ((a), (b) and (c) present QC-LDPC code performances; (d), (e) and (f) show uncoded cases).</p>" ] ] 6 => array:8 [ "identificador" => "tbl0005" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at1" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:1 [ "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td-with-role" title="table-head ; entry_with_role_rowhead " align="left" valign="top" scope="col">Code rates \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Code lengths</th></tr><tr title="table-row"><th class="td" title="table-head " align="" valign="top" scope="col" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Short-length codes \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Long-length codes \t\t\t\t\t\t\n \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">1/4 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">(900<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>225) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">(1800<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>450) \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">1/3 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">(900<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>300) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">(1800<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>600) \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">1/2 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">(900<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>450) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">(1800<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>900) \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">2/3 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">(900<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>600) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">(1800<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>1200) \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; 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Andreadou" 1 => "F.N. Pavlidou" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Power Delivery" "fecha" => "2010" "volumen" => "25" "numero" => "3" "paginaInicial" => "1440" "paginaFinal" => "1449" ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib0005" "etiqueta" => "Andreadou et al., 2007" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Performance evaluation of LDPC codes on PLC channel compared to other coding schemes" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "N. Andreadou" 1 => "C. Assimakopoulos" 2 => "F.N. Pavlidou" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "LibroEditado" => array:4 [ "titulo" => "Power line communications and its applications symposium, 2007, IEEE" "paginaInicial" => "296" "paginaFinal" => "301" "serieFecha" => "2007" ] ] ] ] ] ] 2 => array:3 [ "identificador" => "bib0015" "etiqueta" => "Chang, 1966" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Synthesis of band-limited orthogonal signals for multichannel data transmission" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "R.W. Chang" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "The Bell System Technical Journal" "fecha" => "1966" "volumen" => "45" "numero" => "10" "paginaInicial" => "1775" "paginaFinal" => "1796" ] ] ] ] ] ] 3 => array:3 [ "identificador" => "bib0020" "etiqueta" => "Chen et al., 2005" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Reduced-complexity decoding of LDPC codes" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "J. Chen" 1 => "A. Dholakia" 2 => "E. Eleftheriou" 3 => "M.P.C. Fossorier" 4 => "X.Y. Hu" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Communications" "fecha" => "2005" "volumen" => "53" "numero" => "8" "paginaInicial" => "1288" "paginaFinal" => "1299" ] ] ] ] ] ] 4 => array:3 [ "identificador" => "bib0025" "etiqueta" => "Develi and Kabalci, 2014a" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Highly reliable LDPC coded data transfer in home networks by using Canete's PLC channel model" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "I. Develi" 1 => "Y. Kabalci" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1088/1361-6528/aa7a7d" "Revista" => array:6 [ "tituloSerie" => "International Journal of Electrical Power & Energy Systems" "fecha" => "2014" "volumen" => "62" "paginaInicial" => "912" "paginaFinal" => "918" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/28631617" "web" => "Medline" ] ] ] ] ] ] ] ] 5 => array:3 [ "identificador" => "bib0030" "etiqueta" => "Develi and Kabalci, 2014b" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Analysis of the use of different decoding schemes in LDPC coded OFDM systems over indoor PLC channels" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "I. Develi" 1 => "Y. Kabalci" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "Elektronika Ir Elektrotechnika" "fecha" => "2014" "volumen" => "20" "numero" => "10" "paginaInicial" => "76" "paginaFinal" => "79" ] ] ] ] ] ] 6 => array:3 [ "identificador" => "bib0035" "etiqueta" => "Develi et al., 2014" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Performance of LDPC coded image transmission over realistic PLC channels for smart grid applications" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "I. Develi" 1 => "Y. Kabalci" 2 => "A. Basturk" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1088/1361-6528/aa7a7d" "Revista" => array:6 [ "tituloSerie" => "International Journal of Electrical Power & Energy Systems" "fecha" => "2014" "volumen" => "62" "paginaInicial" => "549" "paginaFinal" => "555" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/28631617" "web" => "Medline" ] ] ] ] ] ] ] ] 7 => array:3 [ "identificador" => "bib0040" "etiqueta" => "Develi et al., 2015" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Artificial bee colony optimization for modelling of indoor PLC channels: A case study from Turkey" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "I. Develi" 1 => "Y. Kabalci" 2 => "A. Basturk" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Electric Power Systems Research" "fecha" => "2015" "volumen" => "127" "paginaInicial" => "73" "paginaFinal" => "79" ] ] ] ] ] ] 8 => array:3 [ "identificador" => "bib0120" "etiqueta" => "Fu et al., 2014" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Transition management of microgrids with high penetration of renewable energy" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:6 [ 0 => "Q. Fu" 1 => "A. Nasiri" 2 => "V. Bhavaraju" 3 => "A. Solanki" 4 => "T. Abdallah" 5 => "C.Y. David" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Smart Grid" "fecha" => "2014" "volumen" => "5" "numero" => "2" "paginaInicial" => "539" "paginaFinal" => "549" ] ] ] ] ] ] 9 => array:3 [ "identificador" => "bib0045" "etiqueta" => "Gallager, 1963" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Low-density parity-check codes" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "R.G. Gallager" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Libro" => array:3 [ "fecha" => "1963" "editorial" => "MIT Press" "editorialLocalizacion" => "Cambridge, MA" ] ] ] ] ] ] 10 => array:3 [ "identificador" => "bib0050" "etiqueta" => "Galli et al., 2010" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Power line communications and the smart grid" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "S. Galli" 1 => "A. Scaglione" 2 => "Z. Wang" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "LibroEditado" => array:4 [ "titulo" => "In Smart grid communications conference, 2010, IEEE" "paginaInicial" => "303" "paginaFinal" => "308" "serieFecha" => "2010" ] ] ] ] ] ] 11 => array:3 [ "identificador" => "bib0055" "etiqueta" => "Gungor et al., 2011" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Smart grid technologies: Communication technologies and standards" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "V.C. Gungor" 1 => "D. Sahin" 2 => "T. Kocak" 3 => "S. Ergut" 4 => "C. Buccella" 5 => "C. Cecati" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Industrial Informatics" "fecha" => "2011" "volumen" => "7" "numero" => "4" "paginaInicial" => "529" "paginaFinal" => "539" ] ] ] ] ] ] 12 => array:3 [ "identificador" => "bib0065" "etiqueta" => "Hwang et al., 2009" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "OFDM and its wireless applications: A survey" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "T. Hwang" 1 => "C. Yang" 2 => "G. Wu" 3 => "S. Li" 4 => "G.Y. Li" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Vehicular Technology" "fecha" => "2009" "volumen" => "58" "numero" => "4" "paginaInicial" => "1673" "paginaFinal" => "1694" ] ] ] ] ] ] 13 => array:3 [ "identificador" => "bib0070" "etiqueta" => "Jain and Agarwal, 2008" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "An integrated hybrid power supply for distributed generation applications fed by nonconventional energy sources" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "S. Jain" 1 => "V. Agarwal" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Energy Conversion" "fecha" => "2008" "volumen" => "23" "numero" => "2" "paginaInicial" => "622" "paginaFinal" => "631" ] ] ] ] ] ] 14 => array:3 [ "identificador" => "bib0080" "etiqueta" => "Jiang et al., 2009" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "High-throughput QC-LDPC decoders" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "N. Jiang" 1 => "K. Peng" 2 => "J. Song" 3 => "C. Pan" 4 => "Z. Yang" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Broadcasting" "fecha" => "2009" "volumen" => "55" "numero" => "2" "paginaInicial" => "251" "paginaFinal" => "259" ] ] ] ] ] ] 15 => array:3 [ "identificador" => "bib0085" "etiqueta" => "Kabalci et al., 2012" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Modelling and analysis of a power line communication system with QPSK modem for renewable smart grids" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "E. Kabalci" 1 => "Y. Kabalci" 2 => "I. Develi" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1088/1361-6528/aa7a7d" "Revista" => array:6 [ "tituloSerie" => "International Journal of Electrical Power & Energy Systems" "fecha" => "2012" "volumen" => "34" "paginaInicial" => "19" "paginaFinal" => "28" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/28631617" "web" => "Medline" ] ] ] ] ] ] ] ] 16 => array:3 [ "identificador" => "bib0090" "etiqueta" => "Kabalci et al., 2013" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "LDPC coded OFDM systems over broadband indoor power line channels: A performance analysis" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "Y. Kabalci" 1 => "I. Develi" 2 => "E. Kabalci" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "LibroEditado" => array:4 [ "titulo" => "Powereng conference, 2013. IEEE" "paginaInicial" => "1581" "paginaFinal" => "1585" "serieFecha" => "2013" ] ] ] ] ] ] 17 => array:3 [ "identificador" => "bib0095" "etiqueta" => "Liserre et al., 2010" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Future energy systems: Integrating renewable energy sources into the smart power grid through industrial electronics" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "M. Liserre" 1 => "T. Sauter" 2 => "J.Y. Hung" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Industrial Electronics Magazine" "fecha" => "2010" "volumen" => "4" "numero" => "1" "paginaInicial" => "18" "paginaFinal" => "37" ] ] ] ] ] ] 18 => array:3 [ "identificador" => "bib0075" "etiqueta" => "Matanza et al., 2014" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Advanced metering infrastructure performance using European low-voltage power line communication networks" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "J. Matanza" 1 => "S. Alexandres" 2 => "C. Rodríguez-Morcillo" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IET Communications" "fecha" => "2014" "volumen" => "8" "numero" => "7" "paginaInicial" => "1041" "paginaFinal" => "1047" ] ] ] ] ] ] 19 => array:3 [ "identificador" => "bib0100" "etiqueta" => "Myung et al., 2005" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Quasi-cyclic LDPC codes for fast encoding" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "S. Myung" 1 => "K. Yang" 2 => "J. Kim" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Information Theory" "fecha" => "2005" "volumen" => "51" "numero" => "8" "paginaInicial" => "2894" "paginaFinal" => "2901" ] ] ] ] ] ] 20 => array:3 [ "identificador" => "bib0105" "etiqueta" => "Nakagawa et al., 2005" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "A decoding for low density parity check codes over impulsive noise channels" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "H. Nakagawa" 1 => "D. Umehara" 2 => "S. Denno" 3 => "Y. Morihiro" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "LibroEditado" => array:4 [ "titulo" => "Power line communications and its applications symposium, 2005. IEEE" "paginaInicial" => "85" "paginaFinal" => "89" "serieFecha" => "2005" ] ] ] ] ] ] 21 => array:3 [ "identificador" => "bib0110" "etiqueta" => "Nehrir et al., 2011" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "A review of hybrid renewable/alternative energy systems for electric power generation: Configurations, control, and applications" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "M.H. Nehrir" 1 => "C. Wang" 2 => "K. Strunz" 3 => "H. Aki" 4 => "R. Ramakumar" 5 => "J. Bing" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Sustainable Energy" "fecha" => "2011" "volumen" => "2" "numero" => "4" "paginaInicial" => "392" "paginaFinal" => "403" ] ] ] ] ] ] 22 => array:3 [ "identificador" => "bib0115" "etiqueta" => "Phakphisut et al., 2011" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Serial belief propagation for the high-rate LDPC decoders and performances in the bit patterned media systems with media noise" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "W. Phakphisut" 1 => "P. Supnithi" 2 => "T. Sopon" 3 => "L.M.M. Myint" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Magnetics" "fecha" => "2011" "volumen" => "47" "numero" => "10" "paginaInicial" => "3562" "paginaFinal" => "3565" ] ] ] ] ] ] 23 => array:3 [ "identificador" => "bib0125" "etiqueta" => "Spagnuolo et al., 2010" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Renewable energy operation and conversion schemes: A summary of discussions during the seminar on renewable energy systems" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "G. Spagnuolo" 1 => "G. Petrone" 2 => "S. Vasconcelos" 3 => "A.C. Cecati" 4 => "E. Friis-Madsen" 5 => "E. Gubia" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Industrial Electronics Magazine" "fecha" => "2010" "volumen" => "4" "numero" => "1" "paginaInicial" => "38" "paginaFinal" => "51" ] ] ] ] ] ] 24 => array:3 [ "identificador" => "bib0130" "etiqueta" => "Spencer, 2005" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Short-block LDPC codes for a low-frequency power-line communications system" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "Q.H. Spencer" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "LibroEditado" => array:4 [ "titulo" => "Power line communications and its applications symposium, 2005. IEEE" "paginaInicial" => "95" "paginaFinal" => "99" "serieFecha" => "2005" ] ] ] ] ] ] 25 => array:3 [ "identificador" => "bib0135" "etiqueta" => "Sung and Hsu, 2013" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Intelligent environment monitoring system based on innovative integration technology via programmable system on chip platform and ZigBee network" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "W.T. Sung" 1 => "C.C. Hsu" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IET Communications" "fecha" => "2013" "volumen" => "7" "numero" => "16" "paginaInicial" => "1789" "paginaFinal" => "1801" ] ] ] ] ] ] 26 => array:3 [ "identificador" => "bib0140" "etiqueta" => "Wada, 2004" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "A study on performance of LDPC codes on power line communications" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "T. Wada" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "LibroEditado" => array:4 [ "titulo" => "Communications conference, 2004. IEEE" "paginaInicial" => "109" "paginaFinal" => "113" "serieFecha" => "2004" ] ] ] ] ] ] 27 => array:3 [ "identificador" => "bib0060" "etiqueta" => "Wen et al., 2013" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Physical layer assist authentication technique for smart meter system" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "H. Wen" 1 => "Y. Wang" 2 => "X. Zhu" 3 => "J. Li" 4 => "L. Zhou" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IET Communications" "fecha" => "2013" "volumen" => "7" "numero" => "3" "paginaInicial" => "189" "paginaFinal" => "197" ] ] ] ] ] ] 28 => array:3 [ "identificador" => "bib0150" "etiqueta" => "Wu and Zou, 1995" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Orthogonal frequency division multiplexing: A multi-carrier modulation scheme" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "Y. Wu" 1 => "W.Y. Zou" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Consumer Electronics" "fecha" => "1995" "volumen" => "41" "numero" => "3" "paginaInicial" => "392" "paginaFinal" => "399" ] ] ] ] ] ] 29 => array:3 [ "identificador" => "bib0145" "etiqueta" => "Yan et al., 2013" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "A survey on smart grid communication infrastructures: Motivations, requirements and challenges" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "Y. Yan" 1 => "Y. Qian" 2 => "H. Sharif" 3 => "D. Tipper" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1016/j.jbi.2016.09.001" "Revista" => array:7 [ "tituloSerie" => "IEEE Communications Surveys & Tutorials" "fecha" => "2013" "volumen" => "15" "numero" => "1" "paginaInicial" => "5" "paginaFinal" => "20" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/27612974" "web" => "Medline" ] ] ] ] ] ] ] ] 30 => array:3 [ "identificador" => "bib0155" "etiqueta" => "Yu et al., 2011" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Communication systems for grid integration of renewable energy resources" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "F.R. Yu" 1 => "P. Zhang" 2 => "W. Xiao" 3 => "P. Choudhury" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "IEEE Network" "fecha" => "2011" "volumen" => "25" "paginaInicial" => "22" "paginaFinal" => "29" ] ] ] ] ] ] 31 => array:3 [ "identificador" => "bib0160" "etiqueta" => "Zhong et al., 2007" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Area-efficient min-sum decoder design for high-rate quasi-cyclic low-density parity-check codes in magnetic recording" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "H. Zhong" 1 => "W. Xu" 2 => "N. Xie" 3 => "T. Zhang" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "IEEE Transactions on Magnetics" "fecha" => "2007" "volumen" => "43" "paginaInicial" => "4117" "paginaFinal" => "4122" ] ] ] ] ] ] 32 => array:3 [ "identificador" => "bib0165" "etiqueta" => "Zou and Wu, 1995" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "COFDM: An overview" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "W.Y. Zou" 1 => "Y. Wu" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "IEEE Transactions on Broadcasting" "fecha" => "1995" "volumen" => "41" "numero" => "1" "paginaInicial" => "1" "paginaFinal" => "8" ] ] ] ] ] ] ] ] ] ] "agradecimientos" => array:1 [ 0 => array:4 [ "identificador" => "xack287103" "titulo" => "Acknowledgements" "texto" => "<p id="par0140" class="elsevierStylePara elsevierViewall">This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under grant 113E425 and by the Research Fund of Erciyes University under grant FBD-12-3986.</p>" "vista" => "all" ] ] ] "idiomaDefecto" => "en" "url" => "/16656423/0000001500000003/v1_201706230112/S1665642317300445/v1_201706230112/en/main.assets" "Apartado" => array:4 [ "identificador" => "41800" "tipo" => "SECCION" "en" => array:2 [ "titulo" => "Articles" "idiomaDefecto" => true ] "idiomaDefecto" => "en" ] "PDF" => "https://static.elsevier.es/multimedia/16656423/0000001500000003/v1_201706230112/S1665642317300445/v1_201706230112/en/main.pdf?idApp=UINPBA00004N&text.app=https://www.elsevier.es/" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1665642317300445?idApp=UINPBA00004N" ]
| Year/Month | Html | Total | |
|---|---|---|---|
| 2024 October | 24 | 0 | 24 |
| 2024 September | 19 | 3 | 22 |
| 2024 August | 31 | 3 | 34 |
| 2024 July | 20 | 8 | 28 |
| 2024 June | 16 | 3 | 19 |
| 2024 May | 35 | 2 | 37 |
| 2024 April | 33 | 9 | 42 |
| 2024 March | 24 | 2 | 26 |
| 2024 February | 18 | 5 | 23 |
| 2024 January | 63 | 7 | 70 |
| 2023 December | 18 | 3 | 21 |
| 2023 November | 21 | 9 | 30 |
| 2023 October | 20 | 8 | 28 |
| 2023 September | 15 | 3 | 18 |
| 2023 August | 13 | 3 | 16 |
| 2023 July | 13 | 5 | 18 |
| 2023 June | 28 | 4 | 32 |
| 2023 May | 24 | 5 | 29 |
| 2023 April | 62 | 4 | 66 |
| 2023 March | 31 | 3 | 34 |
| 2023 February | 15 | 1 | 16 |
| 2023 January | 16 | 1 | 17 |
| 2022 December | 19 | 3 | 22 |
| 2022 November | 17 | 4 | 21 |
| 2022 October | 27 | 7 | 34 |
| 2022 September | 24 | 13 | 37 |
| 2022 August | 33 | 7 | 40 |
| 2022 July | 30 | 5 | 35 |
| 2022 June | 11 | 6 | 17 |
| 2022 May | 26 | 6 | 32 |
| 2022 April | 26 | 7 | 33 |
| 2022 March | 27 | 12 | 39 |
| 2022 February | 18 | 7 | 25 |
| 2022 January | 56 | 10 | 66 |
| 2021 December | 42 | 12 | 54 |
| 2021 November | 25 | 16 | 41 |
| 2021 October | 31 | 7 | 38 |
| 2021 September | 31 | 17 | 48 |
| 2021 August | 24 | 11 | 35 |
| 2021 July | 48 | 9 | 57 |
| 2021 June | 23 | 14 | 37 |
| 2021 May | 25 | 11 | 36 |
| 2021 April | 60 | 25 | 85 |
| 2021 March | 30 | 3 | 33 |
| 2021 February | 26 | 3 | 29 |
| 2021 January | 39 | 19 | 58 |
| 2020 December | 40 | 12 | 52 |
| 2020 November | 40 | 13 | 53 |
| 2020 October | 34 | 4 | 38 |
| 2020 September | 19 | 9 | 28 |
| 2020 August | 27 | 4 | 31 |
| 2020 July | 20 | 3 | 23 |
| 2020 June | 17 | 5 | 22 |
| 2020 May | 21 | 5 | 26 |
| 2020 April | 48 | 18 | 66 |
| 2020 March | 31 | 4 | 35 |
| 2020 February | 25 | 7 | 32 |
| 2020 January | 22 | 4 | 26 |
| 2019 December | 25 | 3 | 28 |
| 2019 November | 30 | 6 | 36 |
| 2019 October | 25 | 8 | 33 |
| 2019 September | 28 | 9 | 37 |
| 2019 August | 24 | 9 | 33 |
| 2019 July | 14 | 11 | 25 |
| 2019 June | 49 | 15 | 64 |
| 2019 May | 110 | 13 | 123 |
| 2019 April | 66 | 11 | 77 |
| 2019 March | 9 | 2 | 11 |
| 2019 February | 14 | 3 | 17 |
| 2019 January | 16 | 8 | 24 |
| 2018 December | 8 | 8 | 16 |
| 2018 November | 11 | 2 | 13 |
| 2018 October | 49 | 7 | 56 |
| 2018 September | 38 | 10 | 48 |
| 2018 August | 20 | 4 | 24 |
| 2018 July | 20 | 9 | 29 |
| 2018 June | 20 | 2 | 22 |
| 2018 May | 21 | 7 | 28 |
| 2018 April | 6 | 2 | 8 |
| 2018 March | 9 | 1 | 10 |
| 2018 February | 7 | 0 | 7 |
| 2018 January | 11 | 1 | 12 |
| 2017 December | 17 | 0 | 17 |
| 2017 November | 15 | 0 | 15 |
| 2017 October | 17 | 2 | 19 |
| 2017 September | 17 | 0 | 17 |
| 2017 August | 20 | 4 | 24 |
| 2017 July | 21 | 2 | 23 |
| 2017 June | 10 | 7 | 17 |
| 2017 May | 0 | 1 | 1 |
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