收发信机通道不平对分集系统性能的影响

Effect of Gain Difference in Multi-channel Transceiver on the Performanceof Diversity System

分析了分集系统收发信机通道增益不一致产生的原因,分2种情况讨论:一是通道增益不一致导致的信噪比不同对系统误码性能的影响,二是通道增益虽然不一致但不影响分集通道信噪比,即仅仅电平不同对系统误码性能的影响。分析结果表明,通道信噪比不一致对系统性能影响较大,在系统设计时应特别注意避免,这一结论对工程设计具有重要的指导作用。

The reason for gain difference between multi channels of transceiver in dual diversity system is analyzed and discussed in two ways：one is the effect of the difference between SNR of diversity channels on performance; the other is the effect of the difference between signal level of the diversity channels on performance, which is simulated. The result indicates that it is the difference in SNR between diversity channels that degrades the performance of the system seriously, so it should be avoided in system design. The conclusion is instructional in engineering design.