基于循环互相关包络的复调频信号时延估计方法及性能分析

Time-delay estimator of radar signal and its performance analysis based on cyclic cross-correlation amplitude

本文研究了复线性调频信号的时延估计问题，提出了基于信号循环互相关包络的时延估计算法，详细推导了时延估计误差的均值和方差表达式，并分析了其估计性能。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 paper considers the problem of estimating the time-delay of radar LFM signals. An estimator based on the cyclic cross-correlation amplitude is constructed and its performance is analyzed. The mean and variance of estimating error are deduced. It is shown that the estimator can achieve good performance. Finally, the performance of the estimator is given through computer simulation, which is in agreement with the analytic results.