Digital Beam-forming Scheme on Elevation for Bistatic Spaceborne High Resolution Wide Swath SAR

LIN Yuchuan; ZHANG Jianyun; WU Yongjun; ZHOU Qingsong

doi:10.11999/JEIT170012

Volume 39 Issue 10

Oct. 2017

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LIN Yuchuan, ZHANG Jianyun, WU Yongjun, ZHOU Qingsong. Digital Beam-forming Scheme on Elevation for Bistatic Spaceborne High Resolution Wide Swath SAR[J]. Journal of Electronics & Information Technology, 2017, 39(10): 2317-2324. doi: 10.11999/JEIT170012

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Digital Beam-forming Scheme on Elevation for Bistatic Spaceborne High Resolution Wide Swath SAR

doi: 10.11999/JEIT170012

Funds:

The Natural Science Foundation of Anhui Province (1508085MF119)

Received Date: 2017-01-03
Rev Recd Date: 2017-05-03
Publish Date: 2017-10-19

Abstract

Abstract

In bistatic spaceborne High Resolution Wide Swath SAR (HRWS-SAR) system, the Digital Beam Forming (DBF) technique is employed to achieve the coherent combination of multi-channel signals in the fast time domain, and its performance is affected by the bistatic configuration. For a point target, the relationship between receiver aspect angle and the sum of transmitter distance and receiver distance is approximated by a linear function, and the echo signal model in elevation channel is built. Further, a DBF processing scheme is proposed, which combines the time-variant weighting and Finite Impulse Response (FIR) filtering, and the implementation block diagram is presented. The DBF processing is simulated in several typical bistatic configuration spaceborne HRWS-SAR systems. Simulation results show that the higher DBF performance can be achieved in the spaceborne HRWS-SAR system with rational bistatic configuration.
- Bistatic SAR,
- High Resolution Wide Swath (HRWS),
- Digital Beam Forming (DBF),
- Bistatic configuration

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References(23)

References

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