对通信信号的时差估计技术  

Technique of Estimating Time Difference of Arrival of Communications Signal

作　　者：张正鸿[1] 

机构地区：[1]信息综合控制国家重点实验室,成都610036

出　　处：《电子信息对抗技术》2009年第5期20-24,共5页Electronic Information Warfare Technology

摘　　要：以循环相关理论为基础,讨论了利用循环互相关再相关法进行通信信号时差估计的算法原理,通过仿真验证了时差估计的效果。理论分析和仿真表明该算法具有优越的信号选择能力与干扰和噪声抑制能力;并指出了该方法的优缺点,阐明了该方法适合应用于对通信源的时差估计。Base on cyclic cross-correlation theory, the algorithmic principles is described that timedifference-of-arrival estimation of communications signal using correlated cyclic cross-correlation. And its performance is verified by simulation. The result of the theory analysis and simulation shows that the algorithm has ascendant ability of signal choice and suppressing the interference and noise. The advantages and disadvantages of the cyclic cross-correlation method, and its application in time-difference-of-arrival estimation of communications signal source are concluded.

关 键 词：循环互相关 循环频率 到达时差 循环相关函数再相关 

分 类 号：TN971.1[电子电信—信号与信息处理]