电讯技术2024，Vol.64Issue(4)：584-590,7.DOI:10.20079/j.issn.1001-893x.221208004
半双工译码转发中继信道下的空间耦合RA码设计
Design of Spatially Coupled RA Codes for Decode-and-Forward in Half-duplex Relay Channels
摘要
Abstract
The design method of capacity-approaching spatially coupled RA(SC-RA)codes for half-duplex decode-and-forward relay channel is proposed.For binary erasure channels,the source node sends one SC-RA code to the relay node and the destination node respectively.After receiving the information from the source node,the relay node first correctly recovers the information and then encodes it to generate additional check bits sent to the destination node.The destination node can correctly recover the information from the source node by combining the additional check bits sent by the relay node with the information sent by the source node.To evaluate the asymptotic performances of the proposed SC-RA codes in the three-node relay channel,a modified density evolution algorithm is derived to compute the decoding thresholds.The threshold analysis results show that the proposed SC-RA codes can approach the capacity of the source-to-relay link and the source-to-destination link simultaneously.Moreover,the decoding performances over the binary erasure half-duplex relay channels are also simulated to demonstrate the threshold analysis results.Simulation results show that the bit error rate performance of the designed SC-RA codes is consistent with the decoding thresholds obtained by the Derived Density Evolution Algorithm,the codes exhibit excellent capacity-approaching performances and also are better than spatially coupled low density parity check(LDPC)codes.关键词
协作通信/空间耦合RA码/半双工中继信道/译码转发/密度进化Key words
cooperative communication/spatially coupled RA code/half-duplex relay channel/decode-and-forward/density evolution分类
信息技术与安全科学引用本文复制引用
刘洋,李进达,王斌,张育芝..半双工译码转发中继信道下的空间耦合RA码设计[J].电讯技术,2024,64(4):584-590,7.基金项目
国家自然科学基金资助项目(61801371,U19B2015,61801372) （61801371,U19B2015,61801372）
