摘要
研究了两维数字阵列雷达的数字单脉冲测角方法,分析了基本单脉冲测角过程中存在的问题,提出了改进的数字单脉冲测角方法。该方法在差波束形成过程中考虑了不同工作频率、不同波位的天线等效孔径的变化。针对测角误差信号的非线性特征,在根据误差信号计算目标角度时采用了多阶多项式拟合的方法,给出了数字阵列雷达中数字单脉冲测角的详细过程。计算机仿真和实测结果表明,此方法具有良好的测角性能,减少了对单脉冲测量误差曲线的存储要求,适合于工程实际应用。
The angle measurement method with digital monopulse for 2-dimensional digital array radar is studied.The problems in the process of digital monopulse measurement are analyzed and an improved angle measurement method with digital monopulse is proposed.The variations of equivalent aperture of antenna array with different frequencies and different beam positions are taken into account in the process of difference patterns synthesis.A multi-order polynomial fitting method is adopted to calculate the target＇s angle according to the angle error signal whose characteristic is nonlinear.The detailed process of angle measurement method with digital monopulse for digital array radar is given.The simulation results and the actual measurements show that the method has a good performance in angle estimate.Because of the less memory needed by the error curves,the method is suitable for the project.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2011年第7期1503-1509,共7页
Systems Engineering and Electronics
基金
国家自然科学基金(61001209)
中央高校基本科研业务费专项资金(JY10000902010)
航空科学基金(20100181010)资助课题
关键词
数字阵列雷达
数字单脉冲测角
数字波束形成
天线阵等效孔径
digital array radar
digital monopulse measurement of angle
digital beamforming
equivalent aperture of antenna array
