基于中继择优选择的协同ARQ吞吐量分析

Research on Cooperative ARQ for Two-hop and Two-relay System

本文分为两个部分:基于中继择优选择,分析选择多个中继情况下系统的中断概率;考虑系统延时,仅仅对双中继协同系统、单中继协同ARQ系统和双中继协同ARQ系统的吞吐量进行比较。理论分析和仿真结果说明,协同系统最优中继选择个数越多,系统中断概率就越小;选择单个中继和两个中继的协同ARQ系统的吞吐量,无论高信噪比还是低信噪比情况下,都明显优于非ARQ协同系统。

In this paper, we divided it into two parts： one is best-relay selection from several possible relays, based on outage probability; the other part is throughput analysis of three different systems： two-relay cooperative system, single-relay cooperative ARQ system and two-relay cooperative ARQ system, which consider system delay. The analysis of theory and simulation results show that, on matter there is a high SNR （signal to noise ratio） of between source and relay, or a poor SNR, the throughput of single -relay and two-relay cooperative ARQ is much better than non-cooperative ARQ system.