多径衰落信号循环平稳特性研究及其应用  

Multipath Fading Signal Cyclostationarity and Its Application

作　　者：高泽忠[1,2] 牛英滔 李永贵 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007 [2]南京电讯技术研究所,江苏南京210007

出　　处：《通信技术》2013年第5期4-8,共5页Communications Technology

基　　金：国家自然科学基金资助项目(批准号:61102091)

摘　　要：利用信号的循环平稳特性可有效解决通信中的很多问题。在通信双方未知干扰信号先验知识时,信干噪比(SJNR,Signal-to-Jamming-Plus-Noise Ratio)可以描述人为有意干扰和噪声对通信信道的综合影响。分析典型人为音调干扰、加性高斯白噪声及多径衰落信号的循环平稳特性,得出结论:可利用通信信号、干扰及噪声三者不同的循环平稳特性进行SJNR估计,表征信道质量,为通信中的信道质量判决提供可靠依据。By utilizing the cyclostationarity of signals many problems in communication could be effectively solved. Signal-to-jamming-plus-noise ratio （SJNR） could describe the combined effects of jamming and noise on the communication system when both receiver and transmitter have no prior knowledge of the jamming signal. Based on analysis of the typical tone-jamming, additive Gaussian white noise and multipath fading signals cyclostationarity, the following conclusions could be obtained： the differences of among communication signal, jamming and noise on cyclostationarity can be used to estimate the SJNR values, further represent the channel quality and provide reliable basis for channel quality decision in communication.

关 键 词：信道质量 循环平稳 多径衰落 信干噪比 

分 类 号：TN911.4[电子电信—通信与信息系统]