针对雷达视频信号进行数字量化后仍存在大量噪音干扰的情况 ,分析了噪音电平的基本特点 ,给出了用可编程器件ispLSI1016E实现数字脉冲宽度鉴别的原理电路。利用该电路可以剔除脉冲宽度小于320ns的信号 ,从而降低噪音干扰。文中介绍了鉴别电路的工作原理 ,并给出了仿真波形的示意图 After the digitalization of radar video signal, there still exist a lot of noise interference. The basic characteristics of the noise level are analyzed, and the principle circuit of digital pulse width discrimination using programmable device ispLSI1016E is given. The circuit can be used to eliminate the pulse width of less than 320ns signal, thereby reducing noise interference. The paper introduces the working principle of the identification circuit, and gives the schematic diagram of the simulation waveform