Loading...

Large Array Null Steering Using Compressed Sensing

Khosravi, M ; Sharif University of Technology

481 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/LSP.2016.2580587
  3. Publisher: Institute of Electrical and Electronics Engineers Inc
  4. Abstract:
  5. In this letter, array null steering is formulated as a sparse recovery problem. In addition, a novel null steering scheme for large arrays by perturbing only a few elements is presented. To achieve this goal, compressed sensing (CS) is used to exploit the sparsity of the perturbed elements. The advantages of the proposed scheme are a significant reduction in hardware cost and lower power consumption, as well as less aging of the elements and faster response. Simulation results show that the CS-based method could be efficiently used to generate wide nulls using at least two elements. The interference rejection ratio achieved by the proposed method is 10-20 dB better than the existing solutions. The performance of different null generation methods in terms of peak-to-sidelobe ratio, pointing error, and beam-width is compared as well. The proposed algorithm is a prominent solution for the future 5G base stations, where a fast and low-cost beam shaping algorithm is required
  6. Keywords:
  7. 5G ; Phased array ; Sparse recovery ; Antenna phased arrays ; Beamforming ; Interference suppression ; Signal reconstruction ; Beam-shaping algorithms ; Compressive sensing ; Interference rejection ; Lower-power consumption ; Peak-to-sidelobe ratio ; Perturbed elements ; Compressed sensing
  8. Source: IEEE Signal Processing Letters ; Volume 23, Issue 8 , 2016 , Pages 1032-1036 ; 10709908 (ISSN)
  9. URL: http://ieeexplore.ieee.org/document/7491215