互相关法和互功率谱法时延估计的比较

Comparison between the Time-delay Estimations by Cross-correlation Method and Cross-power Spectrum Method

本文对被动声纳的两种时延估计方法——互相关法与互功率谱法的性能进行了比较,由于船舶辐射噪声和海洋环境噪声的复杂性,本文把重点放在被动声纳海上实测信号的研究上,实验研究表明,互功率谱法比互相关法有较大的环境适应能力和较高的估计精度。

A comparison between the time-delay estimations for passive sonars by cross correlation method and cross-power spectrum method is made in this paper. Due to the complexity of the ship-radiated noise and the ocean ambient noise, the em- phasis of this paper is put on the analysis of passive sonar signals measured at sea tests Results of the tests showed that the cross-power spectrum method has better environment adaptability and higher estimation accuracy than the cross-cor- relation method.