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High-Resolution and Wide-Swath SAR Imaging with Space–Time Coding Array.

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Title: High-Resolution and Wide-Swath SAR Imaging with Space–Time Coding Array.
Authors: Yu, Kun1 (AUTHOR) sqzhu@xidian.edu.cn, Zhu, Shengqi1 (AUTHOR), Lan, Lan1 (AUTHOR), Yang, Biao1 (AUTHOR)
Source: Remote Sensing. May2023, Vol. 15 Issue 9, p2465. 16p.
Subjects: Space-time codes, Synthetic aperture radar, Phase modulation, Phase coding, Modulation coding, Space-based radar
Abstract: To achieve high-resolution and wide-swath (HRWS) synthetic aperture radar (SAR) images, this paper focuses on resolving the problem of separating range-ambiguous echoes with the space–time coding (STC) array. At the modeling stage, the transmit elements and pulses of the STC array are configured with time delay and phase coding modulation, which introduces extra degrees of freedom (DOFs) in the transmit domain. To separate the echoes corresponding to different range-ambiguity regions, the equivalent transmit beamforming is performed in the two-dimensional space–frequency domain. Moreover, in order to compensate for the loss of range resolution during the beamforming progress, the frequency splicing method is proposed. At the analysis stage, the distributed target simulation is provided to demonstrate the effectiveness of obtaining HRWS SAR images in the STC radar. Additionally, the performance of resolving range ambiguity is compared with the traditional radar in terms of the range-ambiguity-to-signal ratio (RASR). [ABSTRACT FROM AUTHOR]
Copyright of Remote Sensing is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: High-Resolution and Wide-Swath SAR Imaging with Space–Time Coding Array.
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  Data: <searchLink fieldCode="AR" term="%22Yu%2C+Kun%22">Yu, Kun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sqzhu@xidian.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhu%2C+Shengqi%22">Zhu, Shengqi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lan%2C+Lan%22">Lan, Lan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Biao%22">Yang, Biao</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Remote+Sensing%22">Remote Sensing</searchLink>. May2023, Vol. 15 Issue 9, p2465. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Space-time+codes%22">Space-time codes</searchLink><br /><searchLink fieldCode="DE" term="%22Synthetic+aperture+radar%22">Synthetic aperture radar</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+modulation%22">Phase modulation</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+coding%22">Phase coding</searchLink><br /><searchLink fieldCode="DE" term="%22Modulation+coding%22">Modulation coding</searchLink><br /><searchLink fieldCode="DE" term="%22Space-based+radar%22">Space-based radar</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To achieve high-resolution and wide-swath (HRWS) synthetic aperture radar (SAR) images, this paper focuses on resolving the problem of separating range-ambiguous echoes with the space–time coding (STC) array. At the modeling stage, the transmit elements and pulses of the STC array are configured with time delay and phase coding modulation, which introduces extra degrees of freedom (DOFs) in the transmit domain. To separate the echoes corresponding to different range-ambiguity regions, the equivalent transmit beamforming is performed in the two-dimensional space–frequency domain. Moreover, in order to compensate for the loss of range resolution during the beamforming progress, the frequency splicing method is proposed. At the analysis stage, the distributed target simulation is provided to demonstrate the effectiveness of obtaining HRWS SAR images in the STC radar. Additionally, the performance of resolving range ambiguity is compared with the traditional radar in terms of the range-ambiguity-to-signal ratio (RASR). [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Remote Sensing is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.3390/rs15092465
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 2465
    Subjects:
      – SubjectFull: Space-time codes
        Type: general
      – SubjectFull: Synthetic aperture radar
        Type: general
      – SubjectFull: Phase modulation
        Type: general
      – SubjectFull: Phase coding
        Type: general
      – SubjectFull: Modulation coding
        Type: general
      – SubjectFull: Space-based radar
        Type: general
    Titles:
      – TitleFull: High-Resolution and Wide-Swath SAR Imaging with Space–Time Coding Array.
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            NameFull: Yu, Kun
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            NameFull: Zhu, Shengqi
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            NameFull: Lan, Lan
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            NameFull: Yang, Biao
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          Dates:
            – D: 01
              M: 05
              Text: May2023
              Type: published
              Y: 2023
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              Value: 15
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              Value: 9
          Titles:
            – TitleFull: Remote Sensing
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