基于PDA+LDPC迭代接收机的分布式协作通信策略

Distributed cooperative communication scheme based on the PDA+LDPC iterative receivers

针对同步DS-CDMA协作通信系统,本文考虑在转发节点端和基站端使用随机数据联合检测算法(probabilistic data association algorithm,PDA)与LDPC码译码器级联的迭代接收机PDA+LDPC,基于该迭代接收机结构,给出了一种分布式协作通信策略,研究表明,该策略较集中式协作伙伴选择策略和传统的DAF协作通信策略可取得更好的系统性能。

Considered with the synchronous DS-CDMA cooperative communication system, this paper employs the PDA＋LDPC iterative receivers which is composed by the PDA detector connected with the LDPC decoder at both of the relay nodes and the base node. Based on the proposed iterative receiver structure, a distributed cooperative communication scheme is developed, and the research results demonstrate that this scheme can achieve some performance gains over the both of the central partner node selection scheme and the conventional DAF cooperative communication means.