A novel RHT-TBD approach for weak targets in HPRF radar  

作　　者：Hongbo YU Guohong WANG Wei WU Shuncheng TAN 

机构地区：[1]Institute of Information Fusion, Naval Aeronautical and Astronautical University

出　　处：《Science China Earth Sciences》2016年第12期59-72,共14页中国科学（地球科学英文版）

基　　金：supported by National Natural Science Foundation of China (Grant Nos. 61179018, 61372027, 61501489);Special Foundation for Mountain Tai Scholars

摘　　要：A novel approach, which can handle ambiguous data from weak targets, is proposed within the randomized Hough transform track-before-detect(RHT-TBD) framework. The main idea is that, without the pre-detection and ambiguity resolution step at each time step, the ambiguous measurements are mapped by the multiple hypothesis ranging(MHR) procedure. In this way, all the information, based on the relativity in time and pulse repetition frequency(PRF) domains, can be gathered among different PRFs and integrated over time via a batch procedure. The final step is to perform the RHT with all the extended measurements, and the ambiguous data is unfolded while the detection decision is confirmed at the end of the processing chain.Unlike classic methods, the new approach resolves the problem of range ambiguity and detects the true track for targets. Finally, its application is illustrated to analyze and compare the performance between the proposed approach and the existing approach. Simulation results exhibit the effectiveness of this approach.A novel approach, which can handle ambiguous data from weak targets, is proposed within the randomized Hough transform track-before-detect（RHT-TBD） framework. The main idea is that, without the pre-detection and ambiguity resolution step at each time step, the ambiguous measurements are mapped by the multiple hypothesis ranging（MHR） procedure. In this way, all the information, based on the relativity in time and pulse repetition frequency（PRF） domains, can be gathered among different PRFs and integrated over time via a batch procedure. The final step is to perform the RHT with all the extended measurements, and the ambiguous data is unfolded while the detection decision is confirmed at the end of the processing chain.Unlike classic methods, the new approach resolves the problem of range ambiguity and detects the true track for targets. Finally, its application is illustrated to analyze and compare the performance between the proposed approach and the existing approach. Simulation results exhibit the effectiveness of this approach.

关 键 词：high pulse repetition frequency weak targets TRACK-BEFORE-DETECT randomized Hough transform multiple hypothesis ranging range ambiguity resolution 

分 类 号：TN215[电子电信—物理电子学] TN248.13