基于局部解线性调频的多频连续波雷达实时加速度补偿算法

Partial-Dechirping-Based Real-Time Acceleration Correction Algorithm for Multi-Frequency Radar

本文给出了多频连续波雷达的一种实时加速度补偿算法。带有加速度信息的雷达回波相当于线性调频信号,目前各种解线性调频算法的最主要缺点在于运算量大,难以用于实时处理。本文提出的算法通过等效的复调制、低通、抽取等处理,得到了完全包含加速度信息的局部时域信号,然后利用加速度模板的方法进行了局部的解线性调频,从而实现加速度补偿。这种方法具有较高的估计精度,并且大大降低了解线性调频的运算量,可以用于雷达实时信号处理。仿真结果证明了该方法的有效性。

This paper presents a new real-time acceleration correction algorithm for multi-frequency radar. Radar echo with acceleration information equal to linear frequency-modulation signal. The main shortage of existing dechirping methods is their high computation, which cannot be used in real-time processing. In the new algorithm, the partial time-domain signal including acceleration is obtained by equivalent complex-modulation,low-pass filtering and decimation processing. And then the dechirping processing is implemented on the partial time-domain signal by acceleration template method. The algorithm has high estimation accuracy, and more important, the method has low computation. Simulated result proves its feasibility and validity.