单脉冲雷达数字接收机幅相不平衡的一种校正方法

给出了单脉冲雷达数字接收机和差三通道幅相不平衡的一种校正方法 ,介绍了这种方法在实际雷达系统中的应用。分析表明 :该方法可以有效校正和差三通道的幅相不平衡 ,提高角误差的测量精度。由于采用数字接收机可以保证接收机对测角精度的影响不随温度漂移而下降 ,从理论上消除了模拟接收机合并通道方法中方位与俯仰通道的互耦和零中频接收机模拟下变频正交双通道幅相不平衡 ,因此具有很高的实际应用价值。

A Correction Method of Amplitude-Phase Imbalance for Digital Receiver of a Monopulse Radar

A correction method of amplitude-phase imbalance for digital receiver of a monopulse radar is presented, and its application in a real radar system is introduced. Analysis indicates that the amplitude-phase imbalance among the three sum-difference receiving channels could be corrected effectively with the proposed method, and thus the precision of angle measurement is increased. By utilizing digital receiver, the precision of angle measurement would not be degraded with the temperature drift. And also, the mutual coupling between azimuth and elevation channels existing in an analog IF receiver and the amplitude-phase imbalance of quadrature channels in an analog zero-IF receiver are theoretically eliminated.