A Novel High-Squint Spotlight SAR Raw Data Simulation Scheme in 2-D Frequency Domain

被引：7
|
作者：
Guo, Zhengwei [1 ,2 ,3 ]
Fu, Zewen [1 ,2 ,3 ]
Chang, Jike [4 ]
Wu, Lin [1 ,2 ,3 ]
Li, Ning [1 ,2 ,3 ]
机构：
[1] Henan Univ, Coll Comp & Informat Engn, Kaifeng 475004, Peoples R China
[2] Henan Univ, Henan Engn Res Ctr Intelligent Technol & Applicat, Kaifeng 475004, Peoples R China
[3] Henan Univ, Henan Key Lab Big Data Anal & Proc, Kaifeng 475004, Peoples R China
[4] Henan Univ, Sch Software, Kaifeng 475004, Peoples R China
来源：
REMOTE SENSING | 2022年 / 14卷 / 03期
基金：
中国国家自然科学基金;
关键词：
synthetic aperture radar (SAR); simulation; high-squint; coordinate transformation; non-uniform fast Fourier transform (NUFFT); SIGNAL SIMULATION; ECHO; TARGET; ALGORITHM;
D O I：
10.3390/rs14030651
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Raw data simulation is the front-end work of synthetic aperture radar (SAR), which is of great significance. For high-squint spotlight SAR, the frequency domain simulation algorithm is invalid because of the range-azimuth coupling effect. In order to realize high-squint spotlight SAR raw data simulation in the frequency domain, an algorithm based on coordinate transformation and non-uniform fast Fourier transform (NUFFT) is proposed. This algorithm generates broadside raw data using a two-dimensional (2-D) frequency simulation algorithm; then, coordinate transformation is used by analyzing the characteristics of broadside and high-squint spotlight SAR. After coordinate transformation, NUFFT is carried out to realize the coupling relation in the 2-D frequency domain. Since the coordinate transformation ignores the influence of range walk, the range walk is compensated after NUFFT. As a result, compared with the traditional squint spotlight SAR frequency domain simulation algorithm, the proposed algorithm can improve the accuracy of point and distributed target imaging results, and the efficiency of the proposed algorithm can be significantly improved in contrast the traditional time domain algorithm.
引用
收藏
页数：17
相关论文
共 50 条
  • [1] Squint spotlight SAR raw signal simulation in the frequency domain using optical principles
    Wang, Yu
    Zhang, Zhimin
    Deng, Yunkai
    [J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2008, 46 (08): : 2208 - 2215
  • [2] A 2-D Fourier domain approach for spotlight SAR raw signal simulation of extended scenes
    Franceschetti, G
    Iodice, A
    Riecio, D
    Ruello, G
    [J]. IGARSS 2002: IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM AND 24TH CANADIAN SYMPOSIUM ON REMOTE SENSING, VOLS I-VI, PROCEEDINGS: REMOTE SENSING: INTEGRATING OUR VIEW OF THE PLANET, 2002, : 853 - 855
  • [3] A Novel SV-PRI Strategy and Signal Processing Approach for High-Squint Spotlight SAR
    Hu, Yuzhi
    Wang, Wei
    Wu, Xiayi
    Deng, Yunkai
    Xiao, Dengjun
    [J]. REMOTE SENSING, 2024, 16 (05)
  • [4] A Novel Motion Compensation Approach for Airborne Spotlight SAR of High-Resolution and High-Squint Mode
    Zeng, Letian
    Liang, Yi
    Xing, Mengdao
    Huai, Yuanyuan
    Li, Zhenyu
    [J]. IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, 2016, 13 (03) : 429 - 433
  • [5] 2-D Frequency Autofocus for Squint Spotlight SAR Imaging With Extended Omega-K
    Lin, Hao
    Chen, Jianlai
    Xing, Mengdao
    Chen, Xiaoxiang
    You, Dong
    Sun, Guangcai
    [J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2022, 60
  • [6] 2-D Autofocus for High-Squint SAR Based on Affine Coordinate Back-Projection Algorithm
    Lou, Yishan
    Lin, Hao
    Chen, Quan
    Xing, Mengdao
    Zhou, Shengwei
    Sun, Guang-Cai
    [J]. IEEE Transactions on Geoscience and Remote Sensing, 2024, 62
  • [7] SAR raw data simulation in the frequency domain
    Khwaja, A. S.
    Ferro-Famil, L.
    Pottier, E.
    [J]. 2006 EUROPEAN RADAR CONFERENCE, 2006, : 277 - +
  • [8] Nonlinear frequency scaling algorithm for high squint spotlight SAR data processing
    Jin, Lihua
    Liu, Xingzhao
    [J]. EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING, 2008, 2008 (1)
  • [9] Nonlinear Frequency Scaling Algorithm for High Squint Spotlight SAR Data Processing
    Lihua Jin
    Xingzhao Liu
    [J]. EURASIP Journal on Advances in Signal Processing, 2008
  • [10] 2-D Fourier Domain SAR raw signal simulation accounting for sensor trajectory deviations
    Franceschetti, G
    Iodice, A
    Perna, S
    Riccio, D
    [J]. IGARSS 2005: IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-8, PROCEEDINGS, 2005, : 4045 - 4048
12345