基于QPSK图传链路信号的多径信道BER仿真  

BER simulation of multipath channel based on QPSK signal

作　　者：王传鑫[1] 许斌[2] 

机构地区：[1]装备指挥技术学院研究生院,北京101416 [2]装备指挥技术学院光电装备系,北京101416

出　　处：《国外电子测量技术》2008年第12期7-9,13,共4页Foreign Electronic Measurement Technology

摘　　要：对于无线通信,衰落是影响系统性能的重要因素,而不同形式的衰落对于信号产生的影响也不相同。本文在分析移动多径信道特性的基础上,建立了不同信道模型下多径时延效应的计算机仿真模型。不仅针对不同信道衰落条件下多径衰落引起的多径效应进行仿真,而且进一步阐述了多径效应的影响,用Matlab对有3条固定路径的AWGN多径信道中的QPSK系统进行BER性能仿真。For wireless communication, fading is the dominant factor that reduces the performance of the system. Different fading brings different effect for signal. The computer simulation models of multipath time delay spread are established in different channels on basis of analyzing the characteristic of mobile multipath channels. The influence of multipath effect on different channels characteristic is simulated, and in order to further describe the influence of multipath effect, influence of multipath fading for QPSK system in AWGN channel is also simulated by Matlab.

关 键 词：无线通信 多径 衰落信道 误码率分析 

分 类 号：TP929[自动化与计算机技术]