成组多普勒处理中的速度—幅度二维配对方法OA

As radar application scenarios become increasingly complex,the requirements for radar performance in clutter suppres-sion are constantly rising.Improved capabilities of radar clutter suppression not only aid in target detection against strong clutter backgrounds,but also provide crucial support for automatic initiation and stable tracking of target trajectories.At present,grouped Doppler processing,with its excellent clutter suppression performance,has been widely used in radar system design,especially in harsh clutter environments,such as coastal closed sea areas or airborne downward-looking detection,where it has become the main-stream technology for target detection in strong clutter backgrounds In this paper,the concept of grouped Doppler processing is firstly introduced,and the impact of velocity matching on the performance of target detection in the course of processing is further analyzed.On this basis,a two-dimensional matching method based on target velocity-amplitude is proposed,which can effectively improve the matching accuracy of spectral peaks of targets in frequency domain and the precision of velocity measurement.Finally,an in-depth analysis of the key parameters and the decision thresholds affecting two-dimensional velocity-amplitude matching is car-ried out by means of simulation experiments.