基于FMCW环扫SAR的成像系统设计及测试方法

TN957.5; 为实现目标不同距离的高分辨率成像,提出一种调频连续波(FMCW)环扫合成孔径雷达(SAR)体制下的目标距离向探测系统设计及测试方法.该系统由模拟前端和FPGA共同处理实现,设计多种工作模式以实现近、中、远3种探测距离及相应的分辨率.通过MATLAB模拟射频前端去调频处理后的信号,加载到FPGA数字下变频处理,对所得信号仿真得到输出频谱,并进行闭环板级实测,验证了该基于FMCW环扫SAR的目标距离向成像系统设计的可行性....

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Published in电子技术应用 Vol. 44; no. 3; pp. 47 - 51
Main Authors 刘靓欢, 黄世锋, 陈章友
Format Journal Article
LanguageChinese
Published 武汉大学电子信息学院,湖北武汉,430072 2018
Subjects
距离向
range direction
环扫合成孔径雷达
数字下变频
FMCW
circular scanning synthetic aperture radar
调频连续波
digital down conversion
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Abstract TN957.5; 为实现目标不同距离的高分辨率成像,提出一种调频连续波(FMCW)环扫合成孔径雷达(SAR)体制下的目标距离向探测系统设计及测试方法.该系统由模拟前端和FPGA共同处理实现,设计多种工作模式以实现近、中、远3种探测距离及相应的分辨率.通过MATLAB模拟射频前端去调频处理后的信号,加载到FPGA数字下变频处理,对所得信号仿真得到输出频谱,并进行闭环板级实测,验证了该基于FMCW环扫SAR的目标距离向成像系统设计的可行性.
AbstractList TN957.5; 为实现目标不同距离的高分辨率成像,提出一种调频连续波(FMCW)环扫合成孔径雷达(SAR)体制下的目标距离向探测系统设计及测试方法.该系统由模拟前端和FPGA共同处理实现,设计多种工作模式以实现近、中、远3种探测距离及相应的分辨率.通过MATLAB模拟射频前端去调频处理后的信号,加载到FPGA数字下变频处理,对所得信号仿真得到输出频谱,并进行闭环板级实测,验证了该基于FMCW环扫SAR的目标距离向成像系统设计的可行性.
Abstract_FL In order to achieve high resolution imaging with different distances,a target range direction detection system is designed and tested under the frequency modulated continuous wave(FMCW) circular scanning synthetic aperture radar(SAR) system.The system is realized by analog front end and FPGA,and various working modes are designed to realize three detecting ranges and corresponding resolutions in the near,middle and far distance.Through MATLAB the RF front-end de-chirped signals are simulated,loaded into the FPGA digital down conversion processing,and emulated to get output spectrum.Closed-loop board level measurement is carried out,and the feasibility of the target range direction imaging system is verified based on FMCW circular scanning SAR.
Author 陈章友
刘靓欢
黄世锋
AuthorAffiliation 武汉大学电子信息学院,湖北武汉,430072
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Author_FL Chen Zhangyou
Huang Shifeng
Liu Lianghuan
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  fullname: 陈章友
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DocumentTitle_FL Design and testing method of imaging system based on FMCW circular scanning SAR
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Keywords 距离向
range direction
环扫合成孔径雷达
数字下变频
FMCW
circular scanning synthetic aperture radar
调频连续波
digital down conversion
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Title 基于FMCW环扫SAR的成像系统设计及测试方法
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