关键词: 协作通信, 放大转发, 选择中继, 误码率, 信道容量

Abstract:

A hybrid relay selection scheme based on amplify-and-forward (AF) is proposed in the general cooperative communication network. In the proposed scheme, all the relays are divided into two groups, referred to as group P and group Q depending on whether they can perform decoding correctly or not. Both group P and group Q will select the relay which has the maximum signal-to-noise ratio at the destination. Simulation results show that the proposed relay selection scheme significantly outperforms the conventional AF selection scheme in terms of both bit error rate (BER) and channel capacity, and that these performance gains considerably grow as the transmission power of group P increases and antennas equipped on the nodes increases respectively.

Key words: cooperative communication, amplify-and-forward, select relay, bit error rate, channel capacity