论文部分内容阅读
一、引言脉冲多卜勒雷达的信号处理是在频域进行的。为了分析地面杂波对机载脉冲多卜勒雷达检测目标的影响,确定所需要的系统改善因子和对信号频谱纯度、天线副瓣电平等指标的要求,需要计算雷达所接收到的地面杂波功率谱密度的大小及其分布情况。许多文献已经提供了计算高脉冲重复频率(目标和杂波都不存在速度模糊)机载脉冲多卜勒雷达所接收到的地面杂波功率谱密度的公式。对于工作于低脉冲重复频率的动目标显示雷达,虽然可以通过频域的分析来确定所需要的系统改善因子及有关的雷
I. Introduction Pulsed Doppler radar signal processing is carried out in the frequency domain. In order to analyze the influence of ground clutter on the detection target of airborne pulsed Doppler radar, determine the required system improvement factor and the requirements of the signal spectral purity, antenna sidelobe level and other indicators, it is necessary to calculate the ground clutter received by the radar Power spectral density of the size and distribution. Many documents have provided formulas for calculating the power spectral density of terrestrial clutter received by airborne pulsed Doppler radars at high pulse repetition frequencies (both target and clutter do not have speed ambiguities). For moving target display radars operating at low pulse repetition frequencies, the required system improvement factors and the associated thunderbolts can be determined by frequency-domain analysis