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两个或多个接收信号之间的延时估计问题在许多工程应用中具有重要的意义。本文提出一种在接收信号的统计特性的先验知识了解甚少,或不了解的情况下,仍能准确地估计出接收信号间时延的方法,并推导了这一估计的方差。该方法是基于自适应噪声抵消器,在其收敛时,用权系数进行内插估计,与传统的用采样函数内插不同,本方法对F.A.Reed等人提出的二次内插法进行了改进,保证了估计精度,在实现上也比较简单。计算机模拟实验与海上实验结果与理论上的分析是一致的。
The problem of delay estimation between two or more received signals is of great importance in many engineering applications. This paper presents a method that estimates the time delay between received signals with little or no prior knowledge of the statistical properties of the received signal and derives the variance of this estimate. This method is based on the adaptive noise canceller. When it converges, it uses the weight coefficient to estimate the interpolation. Different from the traditional interpolation with sampling function, this method improves the quadratic interpolation proposed by FAReed et al. , To ensure the accuracy of the estimation, in the realization is relatively simple. Computer simulation experiments and offshore experimental results and theoretical analysis is consistent.