• Title/Summary/Keyword: Fully Digital Active Array Radar

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Wide Beam Design of a Fully Digital Active Array Radar Using Convex Optimization with Only Phase Control (위상 조정 Convex 최적화 알고리즘을 이용한 완전 디지털 능동배열레이다의 광역빔 설계)

  • Yang, Woo-Yong;Lee, Hyun-Seok;Yang, Sung-Jun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.30 no.6
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    • pp.479-486
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    • 2019
  • The fully digital active array radar uses a wide beam for effective mission performance within a limited time. This paper presents a convex optimization algorithm that adjusts only the phase of an array element. First, the algorithm applies a semidefinite relaxation technique to relax the constraint and convert it to a convex set. Then, the constraint is set so that the amplitude is fixed to some extent and the phase is variable. Finally, the optimization is performed to minimize the sum of the eigenvalues obtained through eigenvalue decomposition. Compared to the application results of the existing genetic algorithm, the proposed algorithm is more effective in wide beam design for a fully digital active array radar.

Analysis of Adaptive Side-Lobe Canceller Algorithm for Fully Digital Active Array Radar (완전 디지털 능동배열 레이다의 적응형 부엽제거 알고리즘에 관한 연구)

  • Yang, Woo-Yong;Park, Min-Kyu;Hong, Sung-Won;Kim, Chan-Hong
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.29 no.5
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    • pp.375-382
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    • 2018
  • To eliminate strong jamming signals, a radar acquires a relatively weak target signal by using a side-lobe canceller (SLC) algorithm. This paper presents a novel adaptive SLC algorithm that is applicable to a fully digital active array radar. First, a covariance matrix is obtained from the SLC beam. Then, an adaptive SLC coefficient is extracted after calculating the correlation matrix between the main beam signal and the SLC beam signal. Finally, the target signal is estimated and the jamming signal is removed through the operation with the main beam signal. The application results from simulated radar signals demonstrated that the proposed algorithm is effective in an SLC system. Moreover, we analyzed various considerations and improved systematic usability.