基于单元筛选的CFAR检测器研究

Two CFAR Detectors Based on Cell Selection

针对CML和CGO-CFAR检测器的最大干扰容限有限的问题,结合单元筛选技术,提出了两种新的CFAR检测器———CSCML-CFAR检测器和CSCGO-CFAR检测器,并推导出了它们的标称化因子的表达式;仿真结果表明:首先,采用单元筛选技术的检测器可以提高最大干扰容限,并且可以减小相对最优检测的检测损失;其次,单元筛选几乎不影响CFAR检测器的虚警控制能力,CSCGO不仅提高了CGO的抗干扰能力,还保持了良好的虚警控制能力;此外,单元筛选处理方法简单,附加时延小,便于工程实现,所以提出的两种新检测器具有一定的应用潜力。

According to the problem that CML and CGO-CFAR detectors have a limit on interfering numbers, two new CFAR detec-tors based on cell selection, CSCML-CFAR and CSCGO-CFAR, are put forward and their threshold multiplier factor＇ analytic expressions are also derived. The simulation demonstrates that the detectors＇ limit on interfering numbers based on cell selection are improved and the de- tection loss is reduced at the same time; Furthermore, the false alarm performance based on CS is almost consistent with the detectors with-out CS. CSCGO-CFAR detector not only improves the anti-jamming performance of CGO-CFAR detector, but also keeps good false a-larm performance. Moreover, these two CFAR detectors have great potential applications because CS is simply, small time-delay and easy to implement in engineering.