空间电子技术2025，Vol.22Issue(2)：48-56,9.DOI:10.3969/j.issn.1674-7135.2025.02.006
基于1-bit的北斗卫星外辐射源目标定位方法研究
Research on the method of Beidou satellite signals based on 1-bit sampling as external radiation sources for target localization
摘要
Abstract
For Beidou satellite external radiation source target positioning,in order to achieve higher positioning accuracy,a considerable amount of data processing is required.1-bit sampling,compared to high-precision sampling,offers advantages such as lower cost,reduced computational load,and smaller data volume.Therefore,1-bit sampling is applied to satellite signal processing,and a target positioning scheme using external radiation sources is designed.First,the principle of 1-bit sampling,as well as its performance loss and boundary conditions,are introduced,and it is found that the performance loss is relatively small under low SNR conditions.Then,a scheme is designed for using Beidou satellite signals based on 1-bit sampling as an external radiation source for target localization.The scheme employs direct wave signal reconstruction,matched filtering,and coherent accumulation processing methods to enhance the SNR of the target-scattered echo signals.Digital beamforming technology is utilized to distinguish the target-scattered echoes from the direct waves in terms of azimuth,thereby reducing the impact of the direct waves on the target-scattered echoes.Modeling and simulation of the signal processing procedure are conducted,and the experimental results indicate that although there is a performance loss compared to high-precision sampling,the proposed scheme can detect the target-scattered echo signals after 1-bit sampling and effectively estimate the target's position and velocity.关键词
1-bit采样/北斗卫星信号处理/外辐射源定位Key words
1-bit sampling/Beidou satellite signal processing/external radiation source location引用本文复制引用
张泽,陈伯孝,尚社,徐境天..基于1-bit的北斗卫星外辐射源目标定位方法研究[J].空间电子技术,2025,22(2):48-56,9.基金项目
国家重点实验室稳定支持基金项目(编号:HTKJ2021KL504005) （编号:HTKJ2021KL504005）
