中国科学院大学学报2018，Vol.35Issue(1)：96-101,6.DOI:10.7523/j.issn.2095-6134.2018.01.013
基于双频共轭的外辐射源雷达多普勒徙动的解决方法
Dealing with Doppler migration for passive radar based on SDCFCP
摘要
Abstract
Long-term coherent integration is a main method to improve gain in target identification for passive radar.However,tangential-speed leads to Doppler expansion based on bistatic model which decreases the gain and then degrades the detection range.In this work we discuss the contribution factor of Doppler migration and propose an algorithm to deal with Doppler migration based on sub-band double carrier frequency conjugated processing (SDCFCP).SDCFCP increases the equivalent wavelength of composite signal,makes Doppler quadratic term close to zero,and solves the Doppler migration problem.We also propose an improved method to decrease PRF at azimuth and enhance the weak target detection ability.SDCFCP can be applied conveniently with little calculation work.Moreover,the algorithm is useful on multi-target scenario.Finally,experiments based on simulated and real signals verify the proposed algorithm.关键词
外辐射源雷达/相参积累/多普勒徙动/双频共轭Key words
passive radar/coherent integration/Doppler migration/SDCFCP分类
信息技术与安全科学引用本文复制引用
张丹,吕晓德,李道京,杨鹏程,柴致海..基于双频共轭的外辐射源雷达多普勒徙动的解决方法[J].中国科学院大学学报,2018,35(1):96-101,6.基金项目
国家部委预研项目资助 （）
