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An efficient method of passive emitter location

机译：一种有效的无源发射极定位方法

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摘要

The problem of locating a stationary emitter from passive bearing and frequency measurements taken by a moving and autonomously operating sensor along its trajectory is considered. The estimation procedure based on bearings only is quite different from that based on frequency measurements. From the Cramer-Rao (CR) analysis of the single-measurement case, the characteristic features of each method become transparent and an intuitive understanding of both methods is provided. One of the major results is that the orientation of the error ellipses of the bearings method (BM) and frequency method (FM) differ significantly. From this a considerable integration gain in accuracy results, when processing the combined set of bearing and frequency measurements. The results of the theoretical CR analysis are verified in a numerical simulation based on the maximum-likelihood (ML) estimation. The simulations demonstrate that a combined method is definitely superior to BM and FM with respect to the bias and the size of the error ellipses.
机译：考虑了从被动方位定位固定发射器的问题，以及移动的自动操作的传感器沿其轨迹进行的频率测量。仅基于方位的估算程序与基于频率测量的估算程序完全不同。通过单次测量案例的Cramer-Rao（CR）分析，每种方法的特征变得透明，并提供了对这两种方法的直观了解。主要结果之一是轴承方法（BM）和频率方法（FM）的误差椭圆的取向有很大不同。由此，在处理轴承和频率测量的组合集时，可以在精度上获得可观的积分增益。基于最大似然（ML）估计的数值模拟验证了理论CR分析的结果。仿真表明，就误差椭圆的偏差和大小而言，组合方法绝对优于BM和FM。

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