2021/09/23 by Nima Taherkhani, Taherkhani, Nima, Kamran Kıasaleh +1
Engineering · #Optical Wireless Communication Technologies #PAPR reduction in OFDM
paper · pdf · doi:10.48550/arxiv.2109.11667
In this paper, we propose a new subcarrier index modulation scheme for\northogonal frequency division multiplexing (OFDM), which incorporates the\nReed-Solomon (RS) encoding in a visible light communication (VLC) system. In\nthis scheme, the incoming bits are first encoded using the RS encoder, then a\nset of symbols in the resulting RS codeword are punctured, and the remaining\nsymbols are modulated and mapped onto the OFDM subcarriers. This system is\nreferred to as RS-OFDM-IM. Unlike the traditional subcarrier index modulation\n(SIM) schemes, the proposed scheme operates based on conveying extra\ninformation by inactivating the selected subcarriers, which facilitates\nsimultaneous clipping noise reduction and spectral efficiency enhancement in\nOFDM-VLC. The bit error rate (BER) and throughput of the proposed technique is\ntheoretically and numerically analyzed. The simulation results show the\nsuperiority of the proposed technique as compared to the coded DCO-OFDM without\nSIM and the classical SIM in OFDM-VLC in a system with practical clipping\nconditions.\n