时间延迟估计的高阶谱矩估计算法

Estimation algorithm for higher order spectral of time delay esthnation

高阶谱估计方法是用于色噪声背景下时间延迟估计的一个十分有效的方法。本文提出了相关高斯色噪声背景下时延估计的高阶谱矩估计算法,改变了以往用互谱估计方法不能求未知互相关函数且加性噪声相关的情况。仿真结果表明,在信噪比为-2.5dB条件下,此方法能有效地抑制色噪声,且基本能估计出时间延迟的位置。

The estimation methods for higher order spectral are efficient in estimating time delay in colored noise. This paper introduces the higher order moment estimation algorithm under the correlated Gaussian colored noise, avoids soluting unknown spatially additive noises using the cross spetral estimation. Simulations have shown that this method can prohibit the colored noise and basically estimate the location of time delay under signal-to-noise ratio-2.5dB.