雷达科学与技术2025，Vol.23Issue(5)：482-490,9.DOI:10.3969/j.issn.1672-2337.2025.05.002
基于时空统一补偿的天基分布式雷达动目标相参合成方法
A Method for Coherent Synthesis of Moving Targets Based on Spatio-Temporal Unified Compensation in Space-Based Distributed Radar
摘要
Abstract
This study addresses the detection requirements of space-based distributed radar system for high-speed maneuvering space targets.Aiming at the problems of echo range migration and Doppler crossing caused by platform spatial position difference and target high-speed maneuvering characteristics,a spatio-temporal two-dimensional coher-ent accumulation method for space-based distributed radar is proposed.Based on the spatio-temporal phase history of target echoes,the algorithm designs a spatio-temporal joint compensation function between and within distributed radar nodes and incorporates the node spatial synthesis compensation and intra-channel target motion compensation into a uni-fied processing framework.Firstly,an equivalent compensation function model is established under the distributed one-transmitter and multi-receiver configuration,emulating a monostatic transceiver mode.Through envelope range correc-tion and spatial phase difference compensation,the echo time-domain process of distributed nodes is completely uni-fied,so as to achieve spatial coherent accumulation.Secondly,the time domain two-dimensional walk correction of the target echo in the node is carried out to realize the time domain pulse coherent accumulation of the high-speed maneu-vering target.To enhance the computational efficiency,on the basis of generalized Radon-Fourier transform(GRFT),the target coherent accumulation problem is transformed into parameter estimation problems such as target angle,velocity,and acceleration,thereby the accumulation detection of space-based distributed radar for space targets is realized.Finally,the effectiveness of the method is evaluated by simulation experiments.The simulation results show that the method can accurately estimate the target parameters,and the coherent accumulation gain is consistent with the theoretical analysis.关键词
天基分布式雷达/相参积累/高速机动目标/扩展GRFTKey words
space-based distributed radar/coherent accumulation/high-speed maneuvering target/extended GRFT分类
电子信息工程引用本文复制引用
张晓波,李相海,徐星苑,高翔,杨志伟..基于时空统一补偿的天基分布式雷达动目标相参合成方法[J].雷达科学与技术,2025,23(5):482-490,9.基金项目
雷达信号处理全国重点实验室支持计划项目(No.JKW202404) （No.JKW202404）
国家自然科学基金青年项目(No.62501454) （No.62501454）
