基于OSVI-CFAR改进的恒虚警检测器  

Improved constant false alarm detector based on OSVI-CFAR

作　　者：文翔 万健中 张海燕[1] 

机构地区：[1]合肥工业大学计算机与信息学院

出　　处：《电子测量与仪器学报》2018年第1期181-187,共7页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金面上项目(61371156)资助

摘　　要：为了提高恒虚警检测器(CFAR)在不断变化的杂波环境下的检测性能,提出了一种基于有序统计类可变性指示(OSVI)检测器改进的恒虚警检测器(new variability index-CFAR,NVI-CFAR)。该检测器将OSVI-CFAR和均值类恒虚警检测器(MLCFAR)各自的优点结合起来,通过可变型指标的作用,自动选择与环境相适应的检测算法。通过仿真实验验证了NVI-CFAR恒虚警检测器的优势,在均匀环境下检测性能与VI-CFAR基本相同,相同检测率的条件下NVI-CFAR的信噪比低于OSVI-CFAR0.27 dB;在多目标环境下具有稳定的抗干扰能力;杂波边缘背景下具有优良的虚警控制能力。In order to improve the detection performance of the constant false alarm detector in the changing clutter environment,a new variability index( CFAR) is proposed based on the improved statistic variability indicator( OSVI) detector. Referred to as NVI-CFAR).The detector combines the advantages of the OSVI-CFAR and the mean-value CFAR( ML-CFAR),and automatically selects the detection algorithm that is compatible with the environment by the action of the variable index. The simulation results show that the performance of NVI-CFAR is similar to that of VI-CFAR in uniform environment. The SNR of NVI-CFAR is 0. 27 dB under the same detection rate. In the multi-target environment has a stable anti-jamming capability; clutter edge background with excellent false alarm control.

关 键 词：检测性能 雷达信号 恒虚警 自适应抗干扰能力 

分 类 号：TN957.51[电子电信—信号与信息处理]