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

作　　者：吴丹[1] 刘莹[1] 方莉 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]河北远东通信系统工程有限公司,河北石家庄050081

出　　处：《无线电通信技术》2007年第4期13-14,24,共3页Radio Communications Technology

摘　　要：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.

关 键 词：分集接收 通道不平 误码性能 信噪比 

分 类 号：TN915.05[电子电信—通信与信息系统]