分集接收抗多径衰落性能及在隧道模型中仿真  

Ability of diversity reception technique to resist multipath decline and simulating with a tunnel model

作　　者：张会清[1] 王普[1] 高学金[1] 任明荣[1] 

机构地区：[1]北京工业大学电子信息与控制工程学院,北京100124

出　　处：《电波科学学报》2010年第4期793-797,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(60704036)

摘　　要：限定空间(如隧道、井下巷道、建筑物)内多径衰落非常严重,移动通信质量急剧下降。为了抑制多径衰落的影响,主要研究分集接收技术抗多径衰落的性能,推导出采用分集接收技术后接收机的信噪比和误码率的表达式,并利用矩形隧道多径传播模型对RAKE接收机的误码特性进行了仿真。仿真结果表明:采用分集接收技术后,有效降低了多径衰落的影响,提高了接收信号的信噪比,增加了传输的可靠性,在同等条件下,可以扩大移动通信的覆盖范围。The multipath decline is severe in limited space（such as in the tunnel, laneway or building）, so the quality of mobile communication in it drops sharply. The ability of diversity reception technique to resist multipath decline is studied, while the expression of SNR and BER of the system using diversity reception technique is educed, and a bit error simulating curve of RAKE receiver with a rectangle tunnel model is got. The simulating result demonstrates that the performance of the system to resist multipath decline is improved awfully.

关 键 词：分集接收 抗多径衰落 误码特性 仿真 

分 类 号：TN929.533[电子电信—通信与信息系统]