广义互相关函数，用于时延估计的运算，很好用。
Generalized cross-correlation function for time delay estimation of the operation, it just works.
常用的时延估计方法是广义互相关方法，按方法对于较少先验知识、大背景噪声具有一定的局限性。
The common using method is generalized cross correlation, but it has a definite limitation to those without transcendental information on the occasion of having much noise.
阐述了广义互相关时延估计算法的原理并对其作了详细的数学推导，研究各种加权函数的形式以及性能特点。
This thesis presents the theory on the generalized cross-correlation method and its detailed derivation mathematically. Five generalizations of the cross-correlation function are listed and discussed.
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