泄漏信号定位中的时延估计算法

时延估计是阵列信号处理中的一项关键技术，广泛用于如语音增强，说话人定位，其目的是要估计出同源信号到达不同传感器时，由于传输距离不同而引起的时间差。现有的算法主要包括相关、广义互相关方法、自适应最小均方方法等。这些算法因其抗噪性能不同，有着各自的应用场合。本文在一段公共的声波数据上利用各种算法进行时延估计，分析比较算法性能，并将相关方法应用于管道泄漏检测定位误差不超过5%。

Time Delay Estimation Algorithms for Leak Signal Location

Time delay estimation (TDE) is one of the key techniques in the array signal processing, with application include speech enhance and speaker location. TDE is used to derive the time difference of signal propagation from the source to the spatially separated sensors. TDE algorithms mainly include the cross-correlation(CC), generalized cross-correlation(GCC) , the adaptive least mean square (LMS), etc. For these TDE techniques, different approaches show different anti-noise capability, thus using for diverse acoustic scenarios. This paper gives the state of the art TDE techniques. By comparison of the referred algorithms, distinct features of each method , including advantages and disadvantages, are revealed. Finally the cross-correlation method is used to leak detection of oil pipeline, and the error is not more than 5 percent.