Robust adaptive beamforming based on interference covariance matrix reconstruction and mismatched steering vector compensation

Lu Yan, Xiaopeng Yang, Wen Xi, Zongao Zhang, Tapan K. Sarkar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The performance of adaptive beamforming degrades in presence of signal model mismatches. In particular, when the desired signal is present in training snapshots, the adaptive beamforming is quite sensitive to desired signal steering vector mismatch. Therefore, a robust adaptive beamforming for actual system is proposed based on the reconstruction of interference covariance matrix and mismatched steering vector compensation. In the proposed method, the interference covariance matrix is firstly reconstructed by using Root-MUSIC method to estimate Direction-of-Arrival (DOA) of signals, where the desired signal component is removed from the training snapshots. Subsequently, the mismatched desired signal steering vector is compensated by solving a quadratically constrained quadratic programming problem. Simulation results show that the performance of proposed algorithm outperforms the existing robust adaptive beamforming, and the output signal-to-interference-plus-noise ratio (SINR) is close to optimal values. Therefore, the proposed algorithm could be significantly effective for actual system.

Original languageEnglish (US)
Title of host publicationProceedings of 3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages189-192
Number of pages4
ISBN (Electronic)9781479943548
DOIs
StatePublished - Dec 18 2014
Event3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014 - Harbin, China
Duration: Jul 26 2014Jul 29 2014

Publication series

NameProceedings of 3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014

Other

Other3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014
CountryChina
CityHarbin
Period7/26/147/29/14

Keywords

  • Adaptive beamforming
  • Root-MUSIC
  • quadratically constrained quadratic programming
  • reconstructed interference covariance

ASJC Scopus subject areas

  • Computer Networks and Communications

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  • Cite this

    Yan, L., Yang, X., Xi, W., Zhang, Z., & Sarkar, T. K. (2014). Robust adaptive beamforming based on interference covariance matrix reconstruction and mismatched steering vector compensation. In Proceedings of 3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014 (pp. 189-192). [6992449] (Proceedings of 3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APCAP.2014.6992449