Abstract:

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.

Key words: cooperative diversity, decode-and-forward, outage probability, fading channel