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Estimation of sea clutter inherent Doppler spectrum from shipborne S-band radar sea echo |
| Jin-Peng Zhang(张金鹏)1,2, Yu-Shi Zhang(张玉石)1, Xin-Yu Xu(许心瑜)1, Qing-Liang Li(李清亮)1, Jia-Ji Wu(吴家骥)2 |
1 China Research Institute of Radiowave Propagation, Qingdao 266107, China;
2 School of Electronic Engineering, Xidian University, Xi'an 710071, China |
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Abstract Measurement of shipborne radar sea echo is instrumental in collecting the sea clutter data in open sea areas. However, the ship movement would introduce an extra Doppler component into the spectrum of the sea clutter, so the sea clutter inherent spectrum must be estimated prior to investigating the sea clutter Doppler characteristics from the shipborne radar sea echo. In this paper we show some results about a shipborne sea clutter measurement experiment that was conducted in the South China Sea in a period between 2017 and 2018; abundant clutter data have been collected by using a shipborne S-band clutter measurement radar. To obtain the sea clutter inherent Doppler spectrum from these data, an estimation method, based on the mapping relationship between the shipborne clutter spectrum and the inherent clutter spectrum, is proposed. This method is validated by shipborne clutter data sets under the same measuring conditions except for the ship speed. Using this method, the characteristics of the Doppler spectrum lineshapes in the South China Sea are calculated and analyzed according to different sea states, wave directions, and radar resolutions, which can be instrumental in designing the radar target detection algorithms.
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Received: 13 January 2020
Revised: 26 March 2020
Accepted manuscript online:
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PACS:
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84.40.Xb
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(Telemetry: remote control, remote sensing; radar)
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07.50.Qx
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(Signal processing electronics)
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02.50.Ey
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(Stochastic processes)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61801446). |
Corresponding Authors:
Jin-Peng Zhang
E-mail: zhjinpeng@hotmail.com
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Cite this article:
Jin-Peng Zhang(张金鹏), Yu-Shi Zhang(张玉石), Xin-Yu Xu(许心瑜), Qing-Liang Li(李清亮), Jia-Ji Wu(吴家骥) Estimation of sea clutter inherent Doppler spectrum from shipborne S-band radar sea echo 2020 Chin. Phys. B 29 068402
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