Abstract: An algorithm combines the auto-correlation and inter-correlation to estimate the time delay of stabilized signal in different noises, based on the analysis of many generalized correlations. Theory analysis and simulation prove that the second correlation can obtain higher precision than the generalized correlation in lower SNR.

Key words: time delay estimation, generalized correlation, the second correlation

摘要： 在研究广义相关时延估计方法和二次相关时延估计方法的基础上，将自相关和互相关结合起来，分别对不同噪声背景下的平稳窄带信号进行了时延估计，从理论上指出了二次相关法的可行性及其适用条件。实验仿真的结果表明，与一次相关法相比较，二次相关法可在更低信噪比的情况下，取得较高的时延估计精度。

关键词: 时延估计, 广义相关, 二次相关

CLC Number: 

• TP391