基于不同导航信号的BISAR系统分辨性能分析  

Resolution Capability Analysis of BISAR System Based on Different Navigation Signals

作　　者：张磊 碗超凡 尹治平[1] ZHANG Lei;WAN Chaofan;YIN Zhiping(Academy of Photoelectric Technology,Hefei University of Technology,Hefei 230009, China)

机构地区：[1]合肥工业大学光电技术研究院,安徽合肥230009

出　　处：《电子科技》2019年第1期62-66,共5页Electronic Science and Technology

基　　金：国家自然科学基金青年科学基金(61401140)~~

摘　　要：基于GNSS信号的双基合成孔径雷达(BISAR)成像系统具有多种突出的优势,已获得越来越多的关注。文中在广义模糊函数的基础上,针对导航卫星信号的伪随机码的特点,引入平均模糊函数的概念,以消除码元序列的伪随机性对系统模糊函数的影响。构建了适用于分析不同码元序列的平均广义模糊函数,对基于不同导航信号的BISAR系统的分辨性能进行了分析比较,并通过仿真进行验证。研究结果表明,导航卫星轨道对BISAR系统的分辨性能有较大影响,BDS导航信号拥有良好的分辨能力。The BISAR system based on navigation satellite signals attracted more and more attention for its advantages.The concept of average ambiguity function was introduced in this paper in order to analyze the resolution capability of BISAR system independently of the particular pseudo-random code,and the generalized ambiguity function(GAF)of the system was studied.Then average GAFs of BISAR system based on different GNSS signals were calculated to compare their resolution performance.The results indicated that the trajectory of navigation satellite had a great influence on the performance of the BISAR system and BDS signal had the best resolution capability.

关 键 词：双基合成孔径雷达 照射源 导航卫星 伪随机码 模糊函数 分辨性能 

分 类 号：TN958.97[电子电信—信号与信息处理]