广义多径信道MDPSK相位比较解调性能  

Performance for M-ary DPSK Communication Systems Employing Differential Phase Detection on General Multipath 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,河南新乡453003

出　　处：《电波科学学报》1998年第2期162-166,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金;电科院预研基金

摘　　要：本文提出了一种适合于广义多径信道多进制差分相移键控信号相位比较解调的性能分析方法，推导出符号平均错误率积分表达式．该表达式考虑了信号幅度衰落，时间选择性衰落和高斯白噪声对体制性能的影响。并针对几种形式的衰落功率谱分别对二进制，四进制和八进制的符号平均错误率进行了数值计算，讨论了衰落功率谱的形式对MDPSK信号性能的影响，并给出了MDPSK信号的“不可克服符号错误率”与衰落功率谱归一化带宽的关系曲线。This paper presents a method for determining the error probability of M-ary DPSK communication systems employing differential phase detection on general multipath channels, and the integral expression of symbol error rate is derived. The effects of Rician fading, time selective fading and white noise on the performance for M-ary DPSK systems have been only considered. With some different fading spectra, MDPSK performance has been numerically calculated for several cases, such as binary, quarternary and octonary. Their effects of different spectral shapes on the performance for M-ary DPSK systems are also discussed, and the irreducible error probability, Pe(∞), of M-ary DPSK systems are plotted as a function of normalized bandwidth of Land Mobile fading spectrum.

关 键 词：MDPSK通信系统 广义多径信道 相位比较解调 

分 类 号：TN911.22[电子电信—通信与信息系统] TN011[电子电信—信息与通信工程]