Volume 9 Issue 2
May  2020
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ZHANG Tianxian and XIA Xiang-Gen. An overview of OFDM SAR imaging methods[J]. Journal of Radars, 2020, 9(2): 243–258. doi: 10.12000/JR19116
Citation: ZHANG Tianxian and XIA Xiang-Gen. An overview of OFDM SAR imaging methods[J]. Journal of Radars, 2020, 9(2): 243–258. doi: 10.12000/JR19116

An Overview of OFDM SAR Imaging Methods

DOI: 10.12000/JR19116
Funds:  The National Natural Science Foundation of China (61971109), The Fundamental Research Funds for the Central Universities (2672018ZYGX2018J009)
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  • Corresponding author: ZHANG Tianxian, txzhang@uestc.edu.cn; XIA Xiang-Gen, xxia@ee.udel.edu
  • Received Date: 2019-12-22
  • Rev Recd Date: 2020-04-22
  • Available Online: 2020-05-08
  • Publish Date: 2020-04-01
  • In recent years, Orthogonal Frequency Division Multiplexing (OFDM) signal has been widely used in Synthetic Aperture Radar (SAR) imaging research due to its orthogonality and large bandwidth. Compared with the traditional SAR, OFDM SAR has certain advantages in imaging applications because of its unique signal characteristics. Nevertheless, OFDM SAR faces many challenges. In this paper, on the basis of different antenna configurations, the problems and studies of single-antenna OFDM SAR imaging and multi-antenna MIMO OFDM SAR imaging are reviewed. The imaging methods of SAR/MIMO SAR based on OFDM and cyclic prefix OFDM signals are discussed, and some possible future research directions of OFDM SAR are presented.

     

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