A Differential Chaotic Bit-Interleaved Coded Modulation System Over Multipath Rayleigh Channels

Jia Zhan, Lin Wang, Marcos Katz, Guanrong Chen
2017 IEEE Transactions on Communications  
In this paper, a novel differential chaotic bitinterleaved coded modulation (DC-BICM) system is proposed for band-limited transmission. This system combines protographbased low density parity check codes with constellation-based M-ary differential chaos shift keying (DCSK) modulation by one bitwise interleaving. Bit error rate simulation results show that the system has higher coding gain compared with the constellation-based M-ary DCSK modulation system with the same spectral efficiency over
more » ... l efficiency over multipath Rayleigh fading channels. At the same time, several simulations and P-EXIT analysis are used to analyze the performance of the proposed system. It is found that there is a lot of room for optimization of the system by comparing decoding thresholds and simulation results. Moreover, the system with only partial channel state information has better performance and lower complexity compared with the traditional bit-interleaved coded modulation (BICM) directsequence-spread-spectrum system. As a result, the DC-BICM system is a good candidate for band-limited transmission. Index Terms-Constellation-based M-ary DCSK, BICM, protograph-based LDPC, multipath Rayleigh fading channel, band-limited transmission.
doi:10.1109/tcomm.2017.2719030 fatcat:3w33wvop3fhzrmyppfhs4ghd6e