高频电离层信道4F4T4PSK系统性能  

Performance for 4F4T4PSK Communication System on HF Ionospheric Channels

作　　者：王先义[1] 江长荫[1] 

机构地区：[1]中国电波传播研究所,中国电波传播研究所学术委员会,新乡,453003,研究员,主任,现从事电波传播理论研究工作新乡

出　　处：《通信学报》1995年第1期17-24,共8页Journal on Communications

基　　金：国家自然科学基金资助项目

摘　　要：本文提出了高频电离层信道4F4T4PSK通信系统性能分析方法,给出了其误码率表达式。4F4T4PSK系统在时变信道上传输信息,信道输出为加性噪声和多条具有不同时延、不同频移和不同到达角传播路径信号的总和。误码率表达式考虑了信道中存在的瑞利衰落、频率与时间选择性衰落、四重频率分集及白噪声的影响。给出了该体制“不可克服误码率”与信道中存在的归一化最大多径时延和归一化多普勒散布的关系曲线,并根据其结果,讨论了该体制对多径时延和多普勒散布扰动的敏感性。最后,针对高频2DPSK系统,对Sunde和Gaarder提出的两种分析方法所得结果进行了分析研究。This paper presents a method for determining the error probability of 4F4T4PSK communication system on HF ionospheric channels. The signals of 4F4T4PSK system are transmitted in the time-varying channels, and the output of the channels includes additive white noise and the sum of singals on several paths with different time delays, frequency shifts and arrival angles. In error-rate expression the effects of Rayleigh fading, frequency-and time-selective fading on HF ionospheric channels, quadruple frequency diversity and white noise have been considered. The irreducible error probability Pe() of 4F4T4PSK system is plotted as a function of the maxium normalized differential time delay and normalized doppler spreads. Finally, using Sunde's method, the error rate of 2DPSK system on HF ionospheric channels are studied and compared with Gaarder's method.

关 键 词：数据通信 电离层信道 高频 误码率 

分 类 号：TN919[电子电信—通信与信息系统]