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    A comparative study of coded and uncoded optical frequency domain channel equalizer in visible light communications
    (Institute of Electrical and Electronics Engineers Inc., 2021) Toprakci, Gamze; Temurtas, Sinem; Polat, Efecan; Özen, Ali
    This article recommends using channel encoders to develop the achievement of optical single carrier frequency domain equalizers (OSC-FDE) in multi-path optical channel environment, which is an alternative to OFDM waveform for visible light communication (VLC) systems. Reed Solomon (RS) and convolutional coding (CC) are used as channel encoders. Computer simulations are made to compare the encoded OSC-FDE method with the non-encoded OSC-FDE and VLC-OFDM methods over the bit error rate (BER) achievement criteria. From the acquired outcomes, it is perceived that 18 dB SNR development is achieved, especially with the convolutional coding. © 2021 IEEE.
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    Öğe
    An investigation of the effects of channel coding techniques in SC and MC VLC systems in AWGN and color noise environment
    (Institute of Electrical and Electronics Engineers Inc., 2021) Polat, Efecan; Kucukusta, Nuh Mehmet; Devellioglu, Timurhan; Besceli, Burak; Toprakci, Gamze; Guelu, Mehmet Murat; Mogol, Taha
    In this study, the effects of channel coding techniques in single carrier (SC) and multi carrier (MC) visible light communication (VLC) systems are investigated. Reed Solomon (RS) and convolutional coding (CC) methods are utilized as channel coding techniques. Computer simulations are carried out in AWGN and colored noise environments to compare the performance of coded and un-coded SC-VLC and MC-VLC systems over bit error rate (BER) achievement criteria. The simulation outcomes show that SC-VLC systems are approximately 10 dB better than MC-VLC systems. © 2021 IEEE.
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    Öğe
    Enhancing the performance of Flip-OFDM systems with channel coding techniques for visible light communications
    (Institute of Electrical and Electronics Engineers Inc., 2021) Temurtas, Sinem; Toprakci, Gamze; Özen, Ali
    This paper suggests employing channel encoders techniques to develop the attainment of the Flip-OFDM system. Reed Solomon (RS) and convolutional coders (CC) are used as channel coding techniques. Simulation works are carried out in AWGN channel and flat fading optical LOS channel surroundings to compare the performance of Non-Encoded VLC-OFDM, Non-Encoded Flip-OFDM, RS-Coded Flip-OFDM and 1/2 rate CC Coded Flip-OFDM systems on bit error rate (BER) achievement benchmark. From the acquired numerical outcomes, it is observed that especially the 1/2 CC Coded Flip-OFDM method is better than other methods. In addition, it is understood from the results that with the 1/2 CC Coded Flip-OFDM method, approximately 18 dB SNR development is achieved for the 1E-3 BER value against the Un-Coded VLC-OFDM method. © 2021 IEEE.