Negative correlation and optimal tracking with Doppler measurements
Negative correlation and optimal tracking with Doppler measurements
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DOI：
10.1117/12.392014
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发表时间：
2000-07
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影响因子：
--
通讯作者：
Y. Bar-Shalom
中科院分区：
文献类型：
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作者：
Y. Bar-Shalom
在利用多普勒雷达(或声纳)的目标跟踪系统中，测量包括距离、距离速率和一个或两个角度。当在适当的几何结构中使用多个传感器时，最终精度主要由每个传感器的距离估计精度决定。在这种情况下，通过最优地处理距离和距离速率测量来提取距离方向上最准确的状态估计尤其重要。在跟踪滤波器的设计中，通常假设距离和测距率的测量误差是不相关的。然而，在常用的上扫线性调频(线性调频)波形的情况下，距离和距离速率测量噪声之间存在显著的负相关。本说明的目的是量化当这种相关性存在并被考虑时可以获得的业绩改进。
In target tracking systems that utilize Doppler radar (or sonar), the measurements consist of range, range rate and one or two angles. When multiple sensors are used in the proper geometry, the final accuracy is determined primarily by each sensor's range estimation accuracy. In this case it is particularly important to extract the most accurate state estimate in the range direction by processing optimally the range and range rate measurements. The usual assumption in the design of tracking filters is that the measurement errors in range and range rate are uncorrelated. However, in the case of the commonly used upsweep chirp (linear FM) waveforms, there is a significant negative correlation between the range and range rate measurement noises. The purpose of this note is to quantify the performance improvement one can obtain when this correlation is present and accounted for.