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Robust FDA-STAP Under Transmit Array Gain and Phase Error for Range Ambiguity.

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Τίτλος: Robust FDA-STAP Under Transmit Array Gain and Phase Error for Range Ambiguity.
Συγγραφείς: Song, Di1,2 (AUTHOR) sandy@nynu.edu.cn, Song, Chunyu1,2 (AUTHOR), Wang, Fangyu1 (AUTHOR), Shi, Jinmin1,2 (AUTHOR)
Πηγή: Eng (2673-4117). Jul2026, Vol. 7 Issue 7, p327. 17p.
Θεματικοί όροι: *Space-time adaptive signal processing, *Clutter (Radar), *Signal processing, *Optimization algorithms, *Radar signal processing, *Adaptive signal processing, *Phased array antennas
Περίληψη: Frequency diverse array (FDA)-aided spacetime adaptive processing (STAP) is a useful approach to suppressing range-ambiguous clutter in airborne radars. In general, FDA-STAP schemes based on subspace techniques can provide excellent clutter rejection capability when only limited secondary data are available. However, transmit array gain and phase errors may cause serious performance degradation. To overcome this problem, a robust subspace-based FDA-STAP algorithm is proposed in this work: RSUB-FDA-STAP. Firstly, the influence of transmit array errors on subspace-based FDA-STAP is analyzed, indicating that the errors must be calibrated. Secondly, an error calibration vector is constructed, and an optimization problem is formulated to estimate the errors. Finally, by minimizing the objective function of the optimization problem, the errors are effectively estimated with limited secondary data, and an effective RSUB-FDA-STAP is developed for range-ambiguous clutter suppression. The proposed method effectively suppresses range-ambiguous clutter under transmit array gain and phase errors in comparison with existing robust FDA-STAP techniques. Numerical simulations demonstrate that the developed RSUB-FDA-STAP shows superior robustness against transmit array gain and phase errors. [ABSTRACT FROM AUTHOR]
Βάση Δεδομένων: Academic Search Index
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  Data: Robust FDA-STAP Under Transmit Array Gain and Phase Error for Range Ambiguity.
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  Data: <searchLink fieldCode="AR" term="%22Song%2C+Di%22">Song, Di</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> sandy@nynu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Song%2C+Chunyu%22">Song, Chunyu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Fangyu%22">Wang, Fangyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shi%2C+Jinmin%22">Shi, Jinmin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Eng+%282673-4117%29%22">Eng (2673-4117)</searchLink>. Jul2026, Vol. 7 Issue 7, p327. 17p.
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  Data: *<searchLink fieldCode="DE" term="%22Space-time+adaptive+signal+processing%22">Space-time adaptive signal processing</searchLink><br />*<searchLink fieldCode="DE" term="%22Clutter+%28Radar%29%22">Clutter (Radar)</searchLink><br />*<searchLink fieldCode="DE" term="%22Signal+processing%22">Signal processing</searchLink><br />*<searchLink fieldCode="DE" term="%22Optimization+algorithms%22">Optimization algorithms</searchLink><br />*<searchLink fieldCode="DE" term="%22Radar+signal+processing%22">Radar signal processing</searchLink><br />*<searchLink fieldCode="DE" term="%22Adaptive+signal+processing%22">Adaptive signal processing</searchLink><br />*<searchLink fieldCode="DE" term="%22Phased+array+antennas%22">Phased array antennas</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Frequency diverse array (FDA)-aided spacetime adaptive processing (STAP) is a useful approach to suppressing range-ambiguous clutter in airborne radars. In general, FDA-STAP schemes based on subspace techniques can provide excellent clutter rejection capability when only limited secondary data are available. However, transmit array gain and phase errors may cause serious performance degradation. To overcome this problem, a robust subspace-based FDA-STAP algorithm is proposed in this work: RSUB-FDA-STAP. Firstly, the influence of transmit array errors on subspace-based FDA-STAP is analyzed, indicating that the errors must be calibrated. Secondly, an error calibration vector is constructed, and an optimization problem is formulated to estimate the errors. Finally, by minimizing the objective function of the optimization problem, the errors are effectively estimated with limited secondary data, and an effective RSUB-FDA-STAP is developed for range-ambiguous clutter suppression. The proposed method effectively suppresses range-ambiguous clutter under transmit array gain and phase errors in comparison with existing robust FDA-STAP techniques. Numerical simulations demonstrate that the developed RSUB-FDA-STAP shows superior robustness against transmit array gain and phase errors. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/eng7070327
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 327
    Subjects:
      – SubjectFull: Space-time adaptive signal processing
        Type: general
      – SubjectFull: Clutter (Radar)
        Type: general
      – SubjectFull: Signal processing
        Type: general
      – SubjectFull: Optimization algorithms
        Type: general
      – SubjectFull: Radar signal processing
        Type: general
      – SubjectFull: Adaptive signal processing
        Type: general
      – SubjectFull: Phased array antennas
        Type: general
    Titles:
      – TitleFull: Robust FDA-STAP Under Transmit Array Gain and Phase Error for Range Ambiguity.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Song, Di
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            NameFull: Song, Chunyu
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            NameFull: Wang, Fangyu
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            NameFull: Shi, Jinmin
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          Dates:
            – D: 01
              M: 07
              Text: Jul2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 26734117
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              Value: 7
            – Type: issue
              Value: 7
          Titles:
            – TitleFull: Eng (2673-4117)
              Type: main
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