单脉冲四相调制跟踪接收机研究

Study of Monopulse Tracking System on 4-Phase Modulation

本文基于单脉冲跟踪系统中的四相调制方案,对自跟踪系统的通道及测角进行设计与仿真,分析通道相位一致性和信噪比对测角性能的影响,得出结论:测角性能对通道相位一致性敏感。从工程实践出发,针对特定参数下自跟踪系统的测角性能,得出结论:和差通道和π2/移相器的相位差分别在范围[-3 3]和[-5 5]内变化,信噪比不小于0d B时,方位和俯仰的误差百分比可控制在1/10以内。

Based on the 4-phase modulation scheme, the channel and angle measurement of tracking sysetem are designed and simulated in thia paper and the influnence of the channel phase consistency and SNR on angle measurement performance is analyze. The result shows that the performance of angle measurement is sensitive to the channel phase consistency through the simulation analysis in the monopulse tracking receiver. Considering the engineering practice and the specific system parameters, the conclusion is drawn that azimuth and elevation error percentage are less than 1/10 when the phase difference of the sum-difference channel and the phase shifter changes in the range of [-3 3] and [-5 5] at the same time SNR is less than 0dB.