該文主要介紹了幾種時延估計器的原理和方法，并且重點介紹了自適相位估計器、自
適應線譜增強器的原理和方法以及它們在時延估計中的應用。在以聲吶脈沖模塊的三元非對稱應用背景下，介紹了自適相位估計器、自適應線譜增強器的應用方法及其流程，這一方法也可以很方便的應用在其它場合。文章的最后給出了計算機仿真及實驗室內利用模擬器進行實驗的實驗結果，在實驗中，自適應時延差估計的方法表現出了優良的性能，而且具有很強的魯棒性，實驗數據充分證明了理論研究和仿真研究的正確性1。
關鍵詞：時延估計 自適應相位估計器 自適應線譜增強(ALE)
Abstract: In this paper, principles and methods of several time delay estimators, adaptive
phase estimator and adaptive linear enhancer and their application in delay estimation are
introduced in this paper. As an example of our time delay estimation in applications, orientate
and ranging model of three asymmetrical elements is very effective and typical. The
application flow chart of the adaptive phase estimator and ALE, as well as the simulation and
experimental results are also shown. In the experiments the adaptive method performance of
delay estimation is excellent.
Key words: delay estimation, adaptive phase estimator, adaptive linear enhancer