雷达本振相位噪声的数字仿真技术

Computerized Simulation of Radar Local Oscillator Phase Noise

在现代雷达和通讯系统中 ,本振相位噪声越来越成为决定系统性能的关键因素。分析了本振调相、调幅噪声对相参雷达系统探测性能的影响 ,给出了主杂波环境下雷达发射机调相噪声以及发射机泄漏的调幅噪声的数字仿真模型。在雷达数字仿真系统中使用这些模型 ,可以在各种环境下定量分析微波本振相位噪声对目标探测性能的影响 ,对昂贵的微波系统提出满足总体设计要求的合理指标。

In modern radar and communication system,phase noise of local oscillator(LO) becomes a vital factor of system performance.This paper presents computer simulation models of amplitude modulation(AM) noise of radar transmitter leakage and phase modulation(PM) noise of clutter in main lobe,it gives a analysis of the effect of LO AM/PM noise to the capability of radar detector.By using this model in radar system simulation,we can calculate the effect of LO phase niose to radar detector performance quantitatively,and acquire reasonable specifications of valuable microwave subsystem.