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- Title
海洋4A散射计幅相校正算法FPGA优化实现.
- Authors
刘永庆; 刘 鹏; 云日升; 张祥坤; 王 特
- Abstract
The Ocean 4A scatterometer is the worlds first spaceborne microwave scatterometer employing a phased-array digital beamforming system. Achieving high-precision measurements in phased-array scatterometers relies on the consistency of individual channels within the system. Therefore, it necessitates real-time correction of the amplitude and phase of each channel to ensure the array accurately synthesizes the required beams. This paper presents a real-time amplitude and phase correction algorithm for phased-array scatterometer channels. The proposed algorithm is implemented using field-programmable gate array (FPGA), capitalizing on FPGA7 s parallel processing capabilities and high-speed performance to process received signals in real-time, thereby achieving amplitude and phase calibration for the channels. Simulations, FPGA hardware implementation, and analysis of measured data show that the proposed algorithm effectively corrects channels amplitudes and phases, with an average error of less than 1 %. The proposed algorithm enhances the synthetic performance of digital beamforming, demonstrating the feasibility of high-precision measurements in phased-array scatterometers.
- Subjects
PROCESS capability; GATE array circuits; SIGNAL processing; BEAMFORMING; DATA analysis
- Publication
Systems Engineering & Electronics, 2024, Vol 46, Issue 8, p2554
- ISSN
1001-506X
- Publication type
Article
- DOI
10.12305/j.issn.1001506X.2024.08.03