基于GIS信息的CFAR检测器

CFAR Detector Based on GIS Information

在雷达信号检测过程中,为了实现恒虚警处理,必须采用动态门限。恒虚警检测器的门限设置通常是利用待检测单元附近的距离单元杂波数据进行计算得到的。然而,杂波环境的非均匀性导致了杂波功率随着距离变化剧烈,常规的恒虚警检测器性能会显著下降。文中给出了基于地理信息系统的恒虚警检测算法,利用对杂波环境的了解程度,可以显著提高CFAR检测器的性能。利用IPIX雷达实测数据,验证了该算法性能优于常规的其他CFAR处理器。

In order to realize the constant false alarm ratio（CFAR） process,the dynamic threshold should be used in radar signal detection.The threshold of the CFAR detector can be calculated using the clutter of range bins near by the cell under test.In the real world,the clutter environments is always non homogeneous,which result in the performance degradation of the CFAR detector.In this paper,the CFAR detector using geographic information system（GIS） is proposed.With the knowledge of the clutter environment,the performance of the CFAR detector can be improved remarkably.The IPIX radar data is used to validate that the detector is outperform the other conventional CFAR detectors.