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时间延迟估计方法时常出现于目标方程和距离的检测问题中.通常时延估计问题的数学模型可描述为 x_1(t)=s(t)+n_1(t) (1) x_2(t)=αs(t-τ_1)+n_2(t) (2)此处n_2(t)和n_2(t)分别为两接收信号中的干扰噪声。一般假定s(t),n_1(t)和n_2(t)是联合平稳的,且互不相关。时间延迟估计的目标就是通过对观测信号x_1(t)和x_2(t)的分析处理估算(2)式中出现的因子τ_1。
The time delay estimation method often appears in the detection of the target equation and the distance.The mathematical model of the general time delay estimation problem can be described as x_1 (t) = s (t) + n_1 (t) (1) x_2 (t) = αs (t-τ_1) + n_2 (t) (2) where n_2 (t) and n_2 (t) are respectively the interference noise in the two received signals. It is generally assumed that s (t), n_1 (t) and n_2 (t) are jointly stable and unrelated. The goal of time delay estimation is to estimate the factor τ_1 appearing in Eq. (2) by analyzing the observed signals x_1 (t) and x_2 (t).