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一、概述机载雷达处于脉冲多卜勒(PD)工作状态时,采用主杂波频率跟踪器,补偿载机运动及天线扫描引起的主杂波频率偏移,保证数字信号处理前对主杂波抑制的顺利进行。目前,主杂波频率跟踪大多采用开环或开、闭环结合的方案(见图1),这两种方案都需要一个跟踪范围大、线性度高、频谱纯度好的可控振荡器。使用VCO或VCXO
I. Overview Airborne radar in the pulse Doppler (PD) working state, the use of the main clutter frequency tracker to compensate for carrier motion and antenna scanning caused by the main clutter frequency offset to ensure that the digital signal processing before the main miscellaneous Wave suppression smooth. At present, most of the main clutter frequency tracking using open-loop or open, closed-loop combination of programs (see Figure 1), both programs require a tracking range, high linearity, good spectral purity controlled oscillator. Use VCO or VCXO