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Öğe A comparative simulation study on the performance of LDPC coded communication systems over Weibull fading channels(Universidad Nacional Autonoma de Mexico, Centro de Ciencias Aplicadas y Desarrollo Tecnologico, 2016) Develi I.; Kabalci Y.The Weibull distribution is a useful statistical model that can be used to describe the multipath fading in nowadays wireless communication environments. In this paper, the bit error rate (BER) performance of Low-Density Parity-Check (LDPC) coded communication systems using different decoding rules is presented over Weibull fading channels by means of comparative computer simulations. It is shown that, especially for the case of the Belief Propagation (BP) decoding rule, significant performance improvement can be achieved in comparison with uncoded transmission when the channel is assumed to have Weibull fading. © 2016 Universidad Nacional Autónoma de México, Centro de Ciencias Aplicadas y Desarrollo Tecnológico.Öğe Multiuser communications for broadband indoor power line channels using IDMA technology(2013) Bilim M.; Develi I.; Kabalci Y.Power line communication (PLC) systems are one of the most popular technologies for smart grids due to their cost efficiency. This paper presents bit error rate (BER) performance of traditional interleave-division multiple access (IDMA) systems over broadband (BB) indoor PLC channels. The BB PLC channels considered in this paper are proposed by Cañete and others. Subsequently, simulation results are carried out by using these different BB indoor PLC channel scenarios. © 2013 IEEE.Öğe Proposal of an experimental data and image transmission system and its possible application for remote monitoring smart grids(Universidad Nacional Autonoma de Mexico, Centro de Ciencias Aplicadas y Desarrollo Tecnologico, 2017) Develi I.; Kabalci Y.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. © 2017 Universidad Nacional Autónoma de México, Centro de Ciencias Aplicadas y Desarrollo Tecnológico