一种基于联合网络编码和信道解码的高效率中继技术

摘要

Based on joint network coding and channel decoding, a spectral efficient transmission scheme for two-user single-relay systems is proposed. By exploiting the broadcast nature of the wireless medium and the linear property of practical error control codes, only two time slots are required for data transmission as that in the point-to-point direct transmission. In the first time slot, the two users broadcast their own data to the relay and the destination simultaneously. In the second time slot, the relay performs joint network coding and channel decoding, and then forwards the encoded bits to the destination. Simulations results show that the proposed scheme outperforms the direct transmission in terms of BER performance in various cases.%针对一个两用户单中继系统,研究了一种基于联合网络编码与信道解码的高效率传输技术.利用无线信道的广播特性以及常见信道编码的线性特性,所提出的方法只需要两个时隙即可完成两个用户的数据传输,具有和点对点直接传输一样的传输效率.在第一个时隙,两个用户将各自的数据同时广播给中继和接收端.在第二个时隙,中继进行联合网络编码与信道解码,并将编码后的数据转发给接收端.仿真结果表明在各种情况下,所提出的中继传输技术可以有效改善用户的比特误码率性能.