Abstract: This paper researches the best-relay selection scheme based on Amplify-and-Forward(AF) protocol in Multiple Input Multiple Output(MIMO) relay system, derives the closed-form expressions for the outage probability and average channel capacity, simulates the outage probability and the average channel capacity with different relays. Result shows that the scheme can reduce the outage probability effectively, and the average channel capacity of best-relay selection scheme outperforms the direct transmission scheme as the number of relays increases.

Key words: Amplify-and-Forward(AF), Multiple Input Multiple Output(MIMO) relay, best-relay selection, average channel capacity

摘要： 研究多输入多输出中继系统中基于放大转发协议的最优中继选择方案，推导出中断概率和平均信道容量的闭式表达式，并对不同中继节点数时的中断概率和平均信道容量进行仿真。结果表明，该方案可以有效降低系统中断概率，且随着中继节点数的增多，系统平均信道容量优于直接传输方案。

关键词: 放大转发, 多输入多输出中继, 最优中继选择, 平均信道容量

CLC Number: 

• TP393