时延估计在被动声定位中是一个关键的参数,它的精度直接影响定位的精度。文中着重探讨了时延估计的基本理论及系统的软硬件设计。采用了ROTH加权处理的互相关性对采集到的声信号进行了处理。实验结果表明该算法能够从复杂的声信号中提取出时延值且效果明显。

Time-delay estimation is a key parameter in passive acoustic positioning; whose accuracy directly affects the positioning accuracy. In this paper, focused on the basic theory of time delay estimation and the system design, the ROT H cross-correlation of pairs of collected sound signals was adopted. The results prove that the arithmetic can effectively extract the time delay values from complex acoustic signals.