MARC中联合BICM-ID和网络编码设计及性能分析

联合网络信道编码是将网络编码和信道编码联合处理,通过联合处理网络信道编码可以增加带有噪声信道的分集数,从而进一步提高网络容量。结合联合网络信道编码的思想,基于比特交织编码调制迭代译码(BICM-ID)设计了两种应用于多址接入中继信道(MARC)环境中的联合网络信道编码方案,并对这两种方案进行了仿真比较。仿真结果表明:在译码之前对解调后的软信息直接进行网络译码相比于对译码后的外信息进行网络译码能更加有效地利用中继信道传输的冗余信息。

Joint BICM-ID and Network Coding for the Multiple Access Relay Channel

Joint Network-Channel Coding conducts both the channel coding and network coding simultaneously. By treating network and channel coding jointly, a network can obtain diversity gain. According to joint network-channel coding, two schemes of Bit-Interleaved Coded Modulation with iterative decoding (BICM-ID) based network coding applied to Multiple Access Relay Channel (MARC) were proposed. The simulation results show the additional redundancy from the relay can be more sufficiently exploited if the object of the networking decoding is log-likelihood ratio from demapper module rather than the extrinsic information from decoding module.