Adaptive protograph-based BICM-ID relying on the RJ-MCMC algorithm: a reliable and efficient transmission solution for plasma sheath channels

Abstract

For reentry communication, owing to the influence of the highly dynamic plasma sheath (PS), the parasitic modulation effect can occur and the received phase shift keying (PSK) signal constellation can be severely rotated, leading to unacceptable demodulation performance degradation. In this work, an adaptive noncoherent bit-interleaved coded modulation with iterative decoding (BICM-ID) system with binary PSK (BPSK) modulation and protograph low-density parity-check (LDPC) under the PS channel is proposed. The proposed protograph-based BICM-ID (P-BICM-ID) system can achieve joint processing of demodulation and decoding, where the soft information is adaptively estimated by reversible-jump Markov chain Monte Carlo (RJ-MCMC) algorithms. Simulation results indicate that the proposed system can adapt well to the dramatic and nonstationary characteristics of the PS channel and can obtain a greater 5 dB performance improvement compared to existing algorithms at a bit error rate (BER) of 10−6. Index Terms—Plasma sheath, BICM-ID, Markov Model, Joint Demodulation and Decoding.

An Efficient Simulation Method of Quasi-Neutral Plasma Channel for Hypersonic Vehicle Based on Direct Electron Density Mapping

“…The envelope-phase correlation coefficients of the EM calculation results are 0.9992, −0.9990, −0.9728, and −0.9714, and those of the channel generated by the proposed method are 0.9957, −0.9999, −0.9892, and −0.9780, respectively. As ω < ω p / √ 2 in Condition 1, the correlation coefficient is greater than 0 according to (3), which is different from other conditions. A numerical comparison reveals that the envelope-phase correlation coefficients of the proposed method are similar to those of the EM calculation results.…”