双基星载HRWS-SAR系统俯仰向DBF处理技术

林玉川; 张剑云; 武拥军; 周青松

doi:10.11999/JEIT170012

双基星载HRWS-SAR系统俯仰向DBF处理技术

doi: 10.11999/JEIT170012

基金项目:

安徽省自然科学基金(1508085MF119)

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- 被引次数: 0
出版历程
- 收稿日期: 2017-01-03
- 修回日期: 2017-05-03
- 刊出日期: 2017-10-19

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

Funds:

The Natural Science Foundation of Anhui Province (1508085MF119)

摘要

摘要: 双基星载高分辨率宽测绘带SAR系统(HRWS-SAR)利用数字波束形成技术(DBF)将俯仰向多通道的回波信号进行快时间域的相干合成，DBF处理性能必然受到双基构型的影响。该文针对一般双基构型的星载HRWS- SAR系统，推导了点目标接收方向角与收发距离和之间的线性近似表达式，建立了俯仰向通道的回波信号模型，进而构建了一种时变加权与FIR滤波相结合的DBF处理方法，并给出了系统实现框图。该文对几种典型双基构型的星载HRWS-SAR系统DBF处理进行了仿真，结果表明合理的双基构型能有效提升星载HRWS-SAR系统的DBF处理性能。
- 双基SAR /
- 高分辨宽测绘带 /
- 数字波束形成 /
- 双基构型
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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参考文献(23)

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