一种协作网络编码的调制性能分析

Performance analysis of modulation techniques with cooperative network coding

将物理层网络编码运用于协作通信,可有效地提高系统的频谱利用率和增加网络容量,高阶数字调制方式是提高通信系统传输速率的有效方式之一。结合协作网络编码与数字调制技术,分析了协作网络编码中不同数字调制方式对系统误码率和吞吐量等性能指标的影响,并进一步给出了一种基于此方案的系统功率分配策略。计算机模拟分析表明,协作网络编码可使得高阶调制方式下,既能提高系统吞吐量又能保证系统能得到较低的误帧率。

Physical layer network coding is a promising technique to improve spectral efficiency and network capacity of cooperative relay system, and high order digital modulation techniques are also the effective methods to improve the transmission rate for communication system. This paper analyzes and evaluates bit error rate and throughput in a joint cooperative network coding with modulation system, and a power allocation scheme is also presented. The computer simulation shows that by the deployment of higher-order modulation cooperative network coding system can improve system throughput and also achieve the low frame error rate requirement.