基于不同导航信号的BISAR系统分辨性能分析

doi:10.16180/j.cnki.issn1007-7820.2019.01.0013

电子科技 ›› 2019, Vol. 32 ›› Issue (1): 62-66.doi: 10.16180/j.cnki.issn1007-7820.2019.01.0013

基于不同导航信号的BISAR系统分辨性能分析

张磊,碗超凡,尹治平

合肥工业大学光电技术研究院,安徽合肥 230009

收稿日期:2017-12-22 出版日期:2019-01-15 发布日期:2018-12-29
作者简介:张磊 (1993-),男,硕士研究生。研究方向:信号检测与处理。
基金资助:
国家自然科学基金青年科学基金(61401140)

Resolution Capability Analysis of BISAR System Based on Different Navigation Signals

ZHANG Lei,WAN Chaofan,YIN Zhiping

Academy of Photoelectric Technology,Hefei University of Technology,Hefei 230009, China

Received:2017-12-22 Online:2019-01-15 Published:2018-12-29
Supported by:
Youth Science Foundation of National Natural Science Foundation of China(61401140)

摘要/Abstract

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。

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

Abstract:

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.

Key words: BISAR, transmitter, navigation satellite, pseudo-random code, ambiguity function, resolution capability

中图分类号:

TN958.97

张磊,碗超凡,尹治平. 基于不同导航信号的BISAR系统分辨性能分析[J]. 电子科技, 2019, 32(1): 62-66.

ZHANG Lei,WAN Chaofan,YIN Zhiping. Resolution Capability Analysis of BISAR System Based on Different Navigation Signals[J]. Electronic Science and Technology, 2019, 32(1): 62-66.

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卫星	?_e(u₀)	θ_e(u₀)	Δ?_e	Δθ_e
SAT05	68°	40°	0.66°	-0.258°
SAT15	300°	78.5°	1.91°	-0.167°
SAT18	292°	19.6°	0.378°	0.276°

卫星	GPS	GLONASS	GALILEO	BDS
f_c/MHz	1575.42	1603.13	1575.42	1561.10
B/MHz	1.023	0.511	1.023	2.046
N	1023	511	4092	2046

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

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