基于时延差和相位差结合的分布式相参参数在线精确估计方法  

Online Accurate Estimation Method of Distributed Coherent Parameters Based on Combination of Time Delay Difference and Phase Difference

作　　者：张世超 朱玉权 刘志永 ZHANG Shichao;ZHU Yuquan;LIU Zhiyong(The 8th Research Academy of CSSC,Yangzhou 225101,China)

机构地区：[1]中国船舶集团有限公司第八研究院,江苏扬州225101

出　　处：《舰船电子对抗》2025年第1期82-88,92,共8页Shipboard Electronic Countermeasure

摘　　要：要实现分布式多站干扰信号在指定区域相参合成,需要精确的到达时、频率测量,同时相参合成技术需要将雷达脉冲前沿的确定、数据传输速率、超宽带雷达信号适应能力等相关数字信号处理技术提高一个数量级,在工程实现上,比较难以实现。提出一种基于时延、相位差相结合的分布式相参参数在线精确估计方法实现干扰信号相参合成,即对接收信号进行到达时测量,并进行时间反演处理,得到发射信号的时间差,调整2个干扰节点发射信号的时间差,使干扰信号发射时间对齐,使调整后的时延正好为信号周期的整数倍,且与测量值的差不大于信号周期的一半,以调整后的时延差作为干扰信号发射时间参数,同时以相位差测量值作为干扰信号发射相位参数,实现干扰信号在目标处的同相叠加。In order to realize coherent synthesis of distributed multi-station jamming signals in designated areas,accurate arrival time and frequency measurement are needed.At the same time,coherent synthesis technology needs to improve the determination of radar pulse front,data transmission rate,ultra-wideband radar signal adaptability and other related digital signal processing technologies by an order of magnitude,which is difficult to achieve in engineering implementation.A online accurate estimation method of distributed coherent parameters based on the combination of time delay difference and phase difference is proposed to realize coherent synthesis of interference signals,that is,the received signal is measured on arrival and time inversion processing is carried out to obtain the time difference of transmitted signals,and the time difference of transmitted signals of two interference nodes is adjusted to align the transmission time of interference signals,so that the adjusted time delay is exactly an integer multiple of the signal period,and the difference with the measured value is not greater than half of the signal period.The adjusted time delay difference is used as the transmitting time parameter of jamming signal,and the phase difference measurement value is used as the transmitting phase parameter of jamming signal,so that the jamming signal is superimposed in phase at the target location.

关 键 词：分布式相参 时延差 时间反演 参数估计 

分 类 号：TN972[电子电信—信号与信息处理]