Abstract: Mathematic model of signal processing is established for wideband PD radar. The special requirements for waveform-design of HPRF wideband linear-frequency-modulated pulse Doppler signal are presented. The digital IQ processing method is presented for mono-channel dada with low sampling frequency. Theoretical analysis and simulation result show that the method is superior to the method of mono-channel high-sampling-frequency direct IF sampling used in traditional pulse Doppler radar in the performance of signal energy accumulation.

Key words: wideband pulse Doppler radar, linear-frequency-modulation, digital IQ processing, pulse compression, precision guidance

摘要： 建立了宽带PD雷达信号处理过程的数学模型，提出了高重频宽带线性调频脉冲多卜勒雷达信号的波形设计要求，以及一种单通道低采样率数字IQ处理方法。理论分析与仿真结果表明，该方法相对于传统脉冲多卜勒雷达所采用的高采样率单通道直接中频采样IQ处理方法具有更好的信号能量积累性能。

关键词: 宽带脉冲多卜勒雷达, 线性调频, 数字IQ处理, 脉冲压缩, 精确制导