采用分布式编码的协作HARQ协议

摘要

In order to improve the reliability of the cooperative communication system, a new HARQ protocol is pro-posed by combining the distributed code with the averaged diversity combining technology. The collaborative hybrid repeat request system is constructed by distributed Turbo code. In the destination terminal, the retransmission of relay is processed by incremental redundancy technology, and the Chase combining technology is used to process the source infor-mation. Joint soft decision decoding is adopted at the destination terminal. The outage probability and average throughput are deduced. Compared with non-collaborative HARQ protocols, the collaborative HARQ protocol with distributed code can achieve better performance on flat Rayleigh fading channel.%为提高协作通信系统的可靠性，将分布式编码和码合并技术相结合，提出了一种新的混合自动重传协议，构造了基于分布式Turbo码的协作重传系统模型。目的终端分别采用递增冗余和Chase合并技术处理中继节点和信源的重发信息，并进行联合软判决译码。分析了系统的中断概率和平均吞吐量。仿真结果表明，在平坦瑞利衰落信道下，该分布式编码协作HARQ协议较非协作HARQ协议可获得较大的性能改善。