研究了复线性调频信号的循环互相关估计时延问题。利用信号循环平稳特性,分析了存在时延条件下的复线性调频信号的循环统计特性,同时提出了基于循环互相关包络的时延估计算法,然后分析了其估计性能,推导了循环互相关包络时延估计后的输出信噪比表达式。最后采用计算机仿真得到了估计性能的曲线,仿真实验验证了文中的结论。

The time-delay estimator of complex LFM based on cyclic cross-correlation amplitude is discussed.The cyclic statistics of complex LFM is analyzed,and the time-delay estimator based on the cyclic crosscorrelation amplitude is constructed.Then,the estimator performance is analyzed and output SNR of the estimator is deduced.Finally,the character of the estimator is given through computer simulation,which is in agreement with the analytic results.

TN957.51