一种改善单脉冲雷达测角精度的新方法  

A Novel Approach for Angle Measuring Precision Improvement in Monopulse Radar System

作　　者：姜义成[1] 喻春曦[1] 

机构地区：[1]哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001

出　　处：《雷达科学与技术》2009年第5期380-383,388,共5页Radar Science and Technology

基　　金：教育部博士点基金(No.20060213009)

摘　　要：提出了一种基于最大平均改善因子的自适应动目标显示(AMTI)和APES算法提高测角精度的新方法。在单脉冲雷达系统中,雨杂波降低了多普勒频率检测精度,从而降低了雷达的跟踪能力。传统的动目标显示(MTI)和快速傅里叶变换(FFT)不能满足精密跟踪的要求。为了抑制雨杂波,选择了基于最大平均改善因子的自适应MTI方法。此外,还选用了APES方法来提高频率估计精度。相对于传统的MTI和FFT方法,新的方法具有更好的多普勒频率估计精度,从而可提高比幅法测角精度。最后通过仿真证明了该方法的有效性。This paper presents a novel approach for angle measuring precision improvement based on adaptive moving target indicator（AMTI） and APES algorithm. In monopulse radar system, the rain clutter reduces radar＇s tracking ability by means of decreasing the measuring accuracy in Doppler spectrum. The classical moving target indicator（MTI） and fast Fourier transform（FFT） method doesn＇t meet the precise tracking needs. In order to suppress rain clutter, we choose the adaptive MTI for obtaining the best mean im- provement factor（IF）. Moreover, APES approach is used to enhance the measuring accuracy in this article. Compared with the classical MT1 and FFT, the AMTI and APES based algorithm shows better resolution quality. Thus it improves the amplitude-comparison angle measuring precision. Numerical simulation experiments prove the validity of the new method.

关 键 词：单脉冲雷达 改善因子 自适应动目标显示 APES算法 测角精度 

分 类 号：TN958.4[电子电信—信号与信息处理]