TY - JOUR
T1 - 星载双基地 FMCW-SAR 高分辨时域成像算法
AU - Wang, Yan
AU - Yang, Tianxiao
AU - Ding, Zegang
AU - Zeng, Tao
N1 - Publisher Copyright:
© 2022 Editorial Board of Journal of Signal Processing. All rights reserved.
PY - 2022/1
Y1 - 2022/1
N2 - Bistatic Synthetic Aperture Radar(SAR)has separate transmitting and receiving antennas,which endows the system with flexible structure and strong function expansion. Frequency modulated continuous wave(FMCW)SAR is widely used in air/ground SAR platform because of its low cost. Combining bistatic configuration with FMCW system,spaceborne bistatic FMCW-SAR is applied to satellite platform,which has both the advantages above and is an optional implementation method for future small satellite SAR constellation. At present,the research on bistatic FMCW-SAR high-resolution imaging mostly focuses on the air/ground platform,while there is few research on the space-based platform. Therefore,this paper proposes a high-resolution time-domain imaging processing algorithm suitable for spaceborne bistatic FMCW-SAR system,analyzes the correlation between the distance migration curve after dechirping and the speed of load movement,and proposes a distance migration curve positioning method suitable for space-based platforms,which achieves higher processing accuracy than the traditional time-domain algorithm. The effectiveness of the proposed method has been verified by computer simulation.
AB - Bistatic Synthetic Aperture Radar(SAR)has separate transmitting and receiving antennas,which endows the system with flexible structure and strong function expansion. Frequency modulated continuous wave(FMCW)SAR is widely used in air/ground SAR platform because of its low cost. Combining bistatic configuration with FMCW system,spaceborne bistatic FMCW-SAR is applied to satellite platform,which has both the advantages above and is an optional implementation method for future small satellite SAR constellation. At present,the research on bistatic FMCW-SAR high-resolution imaging mostly focuses on the air/ground platform,while there is few research on the space-based platform. Therefore,this paper proposes a high-resolution time-domain imaging processing algorithm suitable for spaceborne bistatic FMCW-SAR system,analyzes the correlation between the distance migration curve after dechirping and the speed of load movement,and proposes a distance migration curve positioning method suitable for space-based platforms,which achieves higher processing accuracy than the traditional time-domain algorithm. The effectiveness of the proposed method has been verified by computer simulation.
KW - frequency modulated continuous wave
KW - high resolution imaging
KW - spaceborne bistatic synthetic aperture radar
KW - time domain algorithm
UR - http://www.scopus.com/inward/record.url?scp=85184007261&partnerID=8YFLogxK
U2 - 10.16798/j.issn.1003-0530.2022.01.005
DO - 10.16798/j.issn.1003-0530.2022.01.005
M3 - 文章
AN - SCOPUS:85184007261
SN - 1003-0530
VL - 38
SP - 35
EP - 42
JO - Journal of Signal Processing
JF - Journal of Signal Processing
IS - 1
ER -