西安电子科技大学学报（自然科学版）2023，Vol.50Issue(6)：21-33,13.DOI:10.19665/j.issn1001-2400.20231003
外辐射源雷达互模糊函数智能快速计算方法
Fast algorithm for intelligent optimization of the cross ambiguity function of passive radar
摘要
Abstract
The passive radar system realizes the target detection by receiving the direct wave signal from the emitter and the target echo signal.The cross ambiguity function is an important means to improve the coherent accumulation of the echo signal.However,the echo signal received by the passive radar is very weak,so it is necessary to increase the accumulation time to improve the estimation accuracy.When the target speed is fast,the frequency search range increases.In order to achieve a range of target detection requirements and take into account the real-time performance of data processing,it is of great significance to study the fast calculation method of the cross ambiguity function,and due to the objective requirements of long-time accumulation and large-scale time-frequency search,the computation of the cross ambiguity function is huge,which makes it difficult for the traditional accelerated calculation method based on ergodic search to meet the real-time requirements of system processing.In order to improve the efficiency of cross ambiguity function optimization,a time-frequency difference calculation method based on multi-group feature optimization is proposed in this paper.By deeply analyzing the characteristics of typical digital TV signals,a two-stage cross ambiguity intelligent optimization fast calculation method based on target characteristics is designed in the framework of particle swarm optimization theory.By designing an effective search strategy,this method introduces the multi-population iteration mechanism and shrinkage factor,which avoids the disadvantages of the traditional method of redundant computation.On the premise of ensuring the calculation accuracy,the time-frequency point calculation is greatly reduced,and the search efficiency of cross ambiguity function is improved.关键词
外辐射源雷达/互模糊函数/粒子群优化/目标检测Key words
passive radar/ambiguity function/particle swarm optimization/target detection分类
信息技术与安全科学引用本文复制引用
车吉斌,王常龙,贾岩,任紫正,刘春恒,周峰..外辐射源雷达互模糊函数智能快速计算方法[J].西安电子科技大学学报（自然科学版）,2023,50(6):21-33,13.基金项目
国家自然科学基金(61801344,61801347,61631019,61201418,62001350,62101412) （61801344,61801347,61631019,61201418,62001350,62101412）
