星载双基跟飞构型的杂波特性分析及参数选择  

Analysis of clutter characteristics and parameters selection for following configuration of spaceborne bistatic radar

作　　者：谭啸 杨志伟[1] 何鹏远 吴翔宇 TAN Xiao;YANG Zhiwei;HE Pengyuan;WU Xiangyu(National Key Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China)

机构地区：[1]西安电子科技大学雷达信号处理全国重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2023年第9期2735-2743,共9页Systems Engineering and Electronics

基　　金：国家自然科学基金(62071481,61801373)资助课题。

摘　　要：星载双基地雷达收发分置,双基构型导致了分辨率空变和严重的空时谱展宽,目标检测面临极大的挑战。本文基于严格的斜距历程和星地关系,同时考虑分辨率空变性的影响,建立了星载双基地雷达的杂波信号模型,分析了跟飞构型下分辨率空变性及其对杂波谱分布的影响。在此基础上,结合全链路评估模型,以输出信杂噪比损失为指标,分析了观测区域和基线长度对性能的影响,明确了跟飞构型下的关键参数选择依据,能够为实际跟飞构型的系统设计提供参考。The transmitter and receiver of spaceborne bistatic radar are placed on different satellites,bistatic configurations cause resolution spatial variation and severe space-time power spectrum broadening,posing great challenge to moving target indication.Based on strict slant range and satellite-earth relation,and taking into consideration the influence of resolution spatial variation,a signal model of clutter is established and the resolution spatial variation and its influence on the distribution of space-time power spectrum are analysed.Drawing on the full link evaluation mode and the index of output signal-to-clutter-plus-noise ratio loss,the performance under the influence of observation area and baseline is analysed and criteria for selecting key parameters in same orbital following configuration are specified.This paper provides references for system design of same orbital following configuration.

关 键 词：星载双基地雷达 杂波模型 杂波特性 轨道构型 

分 类 号：TN951[电子电信—信号与信息处理]