数字正交调制器在脉冲多卜勒雷达杂波信号模拟中的应用

The Application of DQM in Clutter Simulation for Pulse Doppler Radar

杂波信号是频谱关于零多卜勒不对称的非平稳随机信号，在实验室仿真时，需要将时域信号搬移到中频或射频上。为了得到较高的镜频抑制度，文章提出了数字正交调制（ DQM）的方法，以取代传统的线性正交调制器（ LQM），文中对其实现原理进行了阐述。

The clutter for pulse Doppler radar is non－ stationary random signal. Its power spectrum density is non－ symmetry about zero Doppler frequency. As clutter simulating in library, the time domain sequences need to be moved to intermediate frequency or radio frequency, in order to refrain mirror frequency effectively, the method of digital quadrature modulation (DQM) is proposed instead of liner quadrature modulation (LQM),and its realization is also discussed in details.