Ocean surface current retrieval and imaging with a new shore-based X-band radar based on time-shifted up-and-down linear frequency modulated signal

Yijun He; Xin Song; Baochang Liu; Na Yi; Xiuzhong Li

doi:10.1007/s13131-021-1715-4

Volume 40 Issue 3

Apr. 2021

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Article Navigation > Acta Oceanologica Sinica > 2021 > 40(3): 112-121

Yijun He, Xin Song, Baochang Liu, Na Yi, Xiuzhong Li. Ocean surface current retrieval and imaging with a new shore-based X-band radar based on time-shifted up-and-down linear frequency modulated signal[J]. Acta Oceanologica Sinica, 2021, 40(3): 112-121. doi: 10.1007/s13131-021-1715-4

Citation:

Yijun He, Xin Song, Baochang Liu, Na Yi, Xiuzhong Li. Ocean surface current retrieval and imaging with a new shore-based X-band radar based on time-shifted up-and-down linear frequency modulated signal[J]. Acta Oceanologica Sinica, 2021, 40(3): 112-121. doi: 10.1007/s13131-021-1715-4

Citation:

Yijun He, Xin Song, Baochang Liu, Na Yi, Xiuzhong Li. Ocean surface current retrieval and imaging with a new shore-based X-band radar based on time-shifted up-and-down linear frequency modulated signal[J]. Acta Oceanologica Sinica, 2021, 40(3): 112-121. doi: 10.1007/s13131-021-1715-4

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Ocean surface current retrieval and imaging with a new shore-based X-band radar based on time-shifted up-and-down linear frequency modulated signal

doi: 10.1007/s13131-021-1715-4

Yijun He^{1, 2},
Xin Song¹,
Baochang Liu^{1
,
,},
Na Yi¹,
Xiuzhong Li¹

1.
School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China
2.
Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China

Funds: The National Key Research and Development Program under contract No. 2016YFC1401002; the National Natural Science Foundation of China under contract Nos 41606201, 41576173, 41620104003 and 41706202.

More Information

Corresponding author: E-mail: bcliu@nuist.edu.cn
Received Date: 2020-04-22
Accepted Date: 2020-05-18

Available Online: 2021-04-30

Publish Date: 2021-04-30

Abstract

Abstract

This paper proposes a multifunction radar that can not only measure sea currents but also perform sea-surface imaging. The fundamental aspect of the proposed radar comprises transmitting time-shifted up-and-down continuous wave linear frequency modulated signals that allow for the offset of two one-dimensional range images of the sea surface that respectively correspond to the upward linear frequency modulated (LFM) signal and the downward LFM signal. Owing to the Doppler frequency shift from the sea surface, a range offset, which is proportional to the radial velocity of the sea surface, occurs between the upward and downward LFM signals. By using the least-squares linear fitting method in the transformed domain, the range offset can be measured and the current velocity can be retrieved. Finally, we verify the accuracy of current measurement with simulation results.
- shore-based radars,
- signal processing,
- ocean surface currents,
- up-and-down CWLFM

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References(23)

References

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