一种子阵级DAR同时多波束拟合测角方法

An Approach for Simultaneous Multi-Beam Fitting Angle Measurement in Digital Array Radar at Subarray Level

针对数字同时多波束技术在子阵级数字阵列雷达中的应用问题,提出了一种适用于子阵级数字阵列雷达的同时多波束测角方法。首先介绍了如何通过数字加权的方式形成同时接收多波束,然后基于比幅法建立了同时多波束拟合测角模型,给出了同时多波束拟合测角方法的实现流程和具体步骤,最后进行仿真验证及分析。仿真结果表明:该方法具有与数字和差单脉冲相当的测角精度,且在保持一定测角精度的情况下,同时多波束拟合测角方法可以获得更宽的测角范围,具有良好的工程化应用价值。

Aiming at the application of digital simultaneous multi-beam technology in subarray-level digital array radar, a multi-beam fitting angle measurement method for subarray-level digital array radar is proposed. First, an approach to form simultaneous multiple beams by digital weighting is introduced. Then a fitting angle estimation model based on amplitude comparison method is established, and its implementation flow and steps are described. At last the simulation and analysis are carried on. The angle estimation preci- sion is equal to that of digital monopulse angle estimation according to simulation results. And the angle esti- mation method can provide a wider range of angle measurement under the condition of keeping certain angle measuring accuracy. It is valuable for engineering application.