一种基于正交处理的角跟踪系统数字校相方法

针对双通道单脉冲角跟踪系统中存在的方位、俯仰差通道不正交的问题，在对基于正交处理的角误差提取原理进行深入研究分析的基础上，通过利用数字振荡器生成本振信号的初相进行相位补偿以及将方位、俯仰差通道分置的方法，进而提出了一种基于正交处理的数字校相方法。通过对采用不同校相方法时角误差提取精度的分析，从理论推导和仿真实验两方面验证了新方法的可行性。仿真结果表明该新方法可以减小方位、俯仰差通道不正交这一因素给角误差提取所带来的误差，从而提高双通道单脉冲角跟踪系统的角误差提取精度。

Digital phase calibration method in angle tracking system based on I/Q processor

Because azimuth and elevation difference channels are not orthogonal in monopulse angle tracking system, this paper presents a new digital phase calibration method by using two NCOs to compensate the azimuth and elevation phase differences to reduce the error of angle estimation with in depth study of the angle error extraction principle in I/Q processor. With an analysis of the precision of angle tracking under different calibration methods, the feasibility of the new method can be validated. As a simulation result, the precision of dual channel monopulse angle tracking system can be improved.