恒虚警(CFAR)处理技术是雷达自动检测系统中控制虚警率最重要的手段.文章首先对恒虚警检测原理进行论述,并给出三种适用于船用导航雷达信号检测的恒虚警处理技术,然后进行模型建立和算法仿真分析.最后在此基础上,针对于杂波边缘环境下,选取处理效果较好的恒虚警处理算法,利用现场可编程门阵列(FPGA)进行硬件实现,并给出系统的实际测试效果图.结果表明,整个系统具有较好的检测性能.%The constant false alarm rate (CFAR) processing is the most important measure in controlling false alarm rate in the automatic detection system of radar. The CFAR detection theory and three CFAR processors, which are applied to marine navigation radar signal detection, are discussed in the article at first. Secondly, their mathematical models are established and algorithm simulation is analyzed. Finally, on that basis, the better CFAR processor algorithm is chosen in the context of clutter edge. It is carried out in Field-Programmable Gate Array (FPGA). And the test result figures of system in practice are given. The result shows that the whole system has well detection performance.
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