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电子学报  2014 

基于TDOA与GROA的信号源被动定位偏差消除技术

DOI: 10.3969/j.iss.0372-2012-2014.03.009, PP. 477-484

Keywords: 信号源定位,到达时间差,到达增益比,偏差消减

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Abstract:

本文针对Ho提出的基于TDOA(TimeDifferenceofArrival)与GROA(GainRatioofArrival)信号源定位的代数闭式解,提出两种偏差消减方法.首先对其闭式解偏差进行了推导,然后给出BiasRed法与BiasSub法两种偏差消减算法,BiasSub法从Ho给出的解中直接减去期望偏差,BiasRed法通过分析误差表达方程并引入二次约束来提升定位估计精度;分析表明两种方法均可针对远距离信号源,在较小高斯误差情况下有效消减定位偏差,BiasRed法可将偏差降低到最大似然估计算法的水平;计算机仿真分析验证了所提算法的性能.

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