Imaging Technology of Doppler Diversity Forward-looking SAR Imaging for Unmanned Aerial Vehicle

Zhichao MENG; Jinyue LU; Pengfei XIE; Lei ZHANG; Hongxian WANG

doi:10.11999/JEIT190096

Volume 41 Issue 12

Dec. 2019

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Article Navigation > Journal of Electronics & Information Technology > 2019 > 41(12): 2852-2858

Zhichao MENG, Jinyue LU, Pengfei XIE, Lei ZHANG, Hongxian WANG. Imaging Technology of Doppler Diversity Forward-looking SAR Imaging for Unmanned Aerial Vehicle[J]. Journal of Electronics & Information Technology, 2019, 41(12): 2852-2858. doi: 10.11999/JEIT190096

Citation:

Zhichao MENG, Jinyue LU, Pengfei XIE, Lei ZHANG, Hongxian WANG. Imaging Technology of Doppler Diversity Forward-looking SAR Imaging for Unmanned Aerial Vehicle[J]. Journal of Electronics & Information Technology, 2019, 41(12): 2852-2858. doi: 10.11999/JEIT190096

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Imaging Technology of Doppler Diversity Forward-looking SAR Imaging for Unmanned Aerial Vehicle

doi: 10.11999/JEIT190096

1.
National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2.
School of Electronic and Communication Engineering, Sun Yat-sen University, Guangzhou 510275, China

Funds: The National Natural Science Foundation of China (61771372, 61771367), The Natural Science Foundation of Shanghai (16ZR1434900)

Received Date: 2019-02-17
Rev Recd Date: 2019-08-31

Available Online: 2019-09-04

Publish Date: 2019-12-01

Abstract

Abstract

Forward-looking Synthetic Aperture Radar (SAR) imaging has the problem of left-right Doppler ambiguity, so it is necessary to use spatial resources for ambiguity resolution. Due to the weight and size of Unmanned Aerial Vehicle (UAV), the receiving array is usually small, and the ability of spatial beam-forming for Doppler ambiguity resolution is insufficient. In addition, the small Doppler gradient and narrow bandwidth of forward-looking SAR echo make the receiving bandwidth underutilized. Based on the above problems, a Doppler diversity Multiple Input Multiple Output (MIMO) forward-looking SAR imaging method is proposed. Based on the forward-looking SAR imaging technology, the narrow-band forward-looking Doppler echo is modulated to different Doppler centers by using Doppler diversity MIMO technology to make full use of the Doppler receiving bandwidth. Furthermore, a virtual receiving array with several times the aperture of the real receiving array can be obtained, which expands greatly the receiving channel and improves effectively the performance of forward-looking SAR imaging in de-Doppler left-right ambiguity.
- Forward-looking SAR imaging,
- Multiple Input Multiple Output (MIMO) radar,
- Doppler diversity,
- Adaptive beam forming

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References(16)

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