基于有限域网络编码的中继选择方法

摘要

针对采用有限域网络编码的多源多中继协作通信系统,提出一种以极大最小距离可分码作为网络编码的自适应中继选择方法,将网络编码技术与中继选择技术相结合来提高系统的复用增益。通过分析系统的中断概率性能,得到系统的分集复用折中,由此证明自适应中继选择方法能够在保持协作系统获得满分集增益的同时,使得系统的复用增益不低于1/2。仿真结果表明,自适应中继选择方法优于传统的网络编码协作方法。%The multi-source multi-relay system with finite field network coding is considered in this paper, and an adaptive relay selection approach based on maximum minimum distance separable code（MDS） is proposed. The system multiplexing gain is improved by combining network coding and relay selection. The diversity-multiplexing tradeoff is derived by analyzing the system outage probabili- ty, which proves that the adaptive relay selection approach can achieve full diversity gain as well as maintain the multiplexing gain not less than 1/2. The simulations verify that the adaptive relay selection approach outperforms conventional network coding cooperation ap- proach.