在协作分集传输系统中,提出一种反馈式选择解码转发方法(FSDF),综合考虑源-中继端与源-目的端的信道传输特性,且由目的端给出反馈信号决定是否采用协作模式;同时得到高信噪比(SNR)下的中断概率表达式.理论分析与仿真结果证明该方法可得到满分集,在可靠性及有效性上均优于解码转发(DF)与选择解码转发(SDF).
An improved selection decode-and-forward method with feedback (FSDF)is proposed in cooperative diversity system, in which both the channel gain of source-to-relay and that of source-to-destination are considered, it is based on the destination' s feedback whether the source terminal adopts the cooperative scheme or not. The formulation of outage probability is derived at high signal-to-noise ratio (SNR). Theoretical analysis and simulation results show that the proposed method can achieve full spatial diversity and will be better than decode-and-forward (DF) and selection decode-and-forward (SDF) both in reliability and efficiency.