MXTM-CFAR Processor and Its Performance Analysis

MXTM-CFAR 처리기와 그 성능분석

An improved MXTM (maximum trimmed mean) -CFAR (constant false alarm rate) processor is proposed to reduce false alarm rates In detecting radar targets and Its performance character is ticsare analyzed to be compared with those of other CFAR processors. The proposed MXTM-CFAR processor is obtained by combining the GO (greatest of ) -CFAR processor reducing excessive falsealarm rate at riutter edges with the TM-CFAR processor showing good performances In homo-geneous Jnonhornog eneous background. Performance analyses have been done by computing detection probability, constant false alarm rate and detection thresholds under the homogeneous or multiple target environments and at the clutter edges. Analysis results how that the proposed CFAR processor maintains its performance as good as those of,05(order statistics) and TM-CFAR inhomogeneous and multiple target environments and Can reduce the false alarm rate at clutter edges. Overall computing time hfs been also reduced.

본 논문은 레이다 목표물 검파에 유용한 MXTM(maximum trmmed mea)-CFAR(constant false alarm rate) 처리기를 제안하고, 성능분석을 통하여 기존의 CFAR 처리기와 비교하였다. 제안된 MXTM-CFAR처리기는 클러터경계에서 좋은 성능을 갖는 GO(greatest of)-CFAR 처리기와 균질 또는 비균질상황에서 좋은 성능을 갖는 기존의 순서통계에 근거한 TM-CFAR 처리기를 결합한 형태이다. 균질상황, 간섭표적상화 및 클러터경계에서 구한 검파확률, 오경보율과 임계치를 통하여 성능을 분석하고 기존의 CFAR 처리기와 비교하였다. 제안된 처리기는 균질상황과 간섭표적상화에서 OS(order statistics)및 TM-CFAR 처리기와 같은 성능을 유지하면서 클러터 경계에서 오경보율을 줄일 수 있어으며 처리시간을 단축 시킬 수 있었다.