本文针对存在信道估计误差的情况,分析了非理想信道状态信息下认知中继系统的性能。建立了非理想信道状态信息下认知中继系统的数学模型,推导出了非理想信道状态信息下认知中继系统中断概率的表达式。理论分析表明在非理想信道状态信息下认知中继系统的性能较理想状态有所下降,但更符合实际情况。同时数值仿真结果验证了理论分析的正确性。 In this paper, the performance of cognitive relay system under non-ideal channel state information is analyzed in the presence of channel estimation error. The mathematical model of cognitive relay system under non-ideal channel state information is established, and the expression of the outage probability of cognitive relay system under non-ideal channel state information is deduced. Theoretical analysis shows that the performance of cognitive relay system is lower than the ideal state under the non-ideal channel state information, but more in line with the actual situation. At the same time, numerical simulation results verify the correctness of the theoretical analysis.