A study on wideband adaptive beamforming based on WBRCB for passive uniform line array sonar

Ara Hyun; Jae-Kyun Ahn; In-Sik Yang; Gwang-Tae Kim

doi:10.7776/ASK.2019.38.2.145

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2019 Vol.38, Issue 2 Preview Page Next Page

Research Article

A study on wideband adaptive beamforming based on WBRCB for passive uniform line array sonar WBRCB 기반의 수동 선배열 소나 광대역 적응빔형성 기법 연구

31 March 2019. pp. 145-153

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Abstract

Adaptive beamforming methods are known to suppress sidelobes and improve detection performance of weak signal by constructing weight vectors depending on the received signal itself. A standard adaptive beamforming like the MVDR (Minimum Variance Distortionless Response) is very sensitive to mismatches between weight vectors and actual signal steering vectors. Also, a large computational complexity for estimating a stable covariance matrix is required when wideband beamforming for a large-scale array is used. In this paper, we exploit the WBRCB (Wideband Robust Capon Beamforming) method for stable and robust wideband adaptive beamforming of a passive large uniform line array sonar. To improve robustness of adaptive beamforming performance in the presence of mismatches, we extract a optimum mismatch parameter. WBRCB with extracted mismatch parameter shows performance improvement in beamforming using synthetic and experimental passive sonar signals.

Keywords

Wideband adaptive beamforming

WBRCB (Wideband Robust Capon Beamforming)

Passive uniform line array sonar

Uncertainty parameter

적응빔형성 기법은 부엽을 줄이고 약한 신호에 대한 탐지 성능을 향상시킨다. MVDR(Minimum Variance Distortionless Response)과 같은 일반적인 적응빔형성 기법은 설계한 가중벡터와 실제 입사신호의 조향벡터의 불일치에 대해 매우 민감하다. 또한 센서 수가 많은 어레이를 이용하여 광대역 적응빔형성을 할 경우 공분산행렬을 산출하기 위해 긴 관측시간과 많은 연산량이 요구된다. 본 논문은 센서 수가 많은 수동 선배열 소나의 광대역 적응빔형성 성능 향상 및 안정성을 위해 WBRCB(Wideband Robust Capon Beamforming)를 적용하였다. 불일치 요소에 강인한 WBRCB 구현을 위해 다양한 불일치 요소를 반영하여 최적의 불일치 파라미터를 도출하였다. 도출된 파라미터를 반영한 WBRCB 기법을 시뮬레이션 및 실험데이터에 적용하여 수동 선배열 소나의 광대역 적응빔형성 성능 향상을 검증하였다.

키워드

광대역 적응빔형성

WBRCB (Wideband Robust Capon Beamforming)

수동 선배열 소나

불일치 파라미터

References

F. B. Jensen, W. A. Kuperman, M. B. Porter, and H. Schmidt, Computational Ocean Acoustics (Springer, New York, 2000), Chap. 10.

J. Capon, "High resolution frequency-wavenumber spectrum analysis," Proc. IEEE. 57, 1408-1418 (1969).

10.1109/PROC.1969.7278

J. Krolik and D. Swingler, "Multiple broad-band source location using steered covariance matrices," IEEE Transactions on Acoustics, Speech, and Signal Processing, 37, 1481-1494 (1989).

10.1109/29.35386

J. Li, P. Stoica, and Z. Wang, "On robust capon beamforming and diagonal loading," IEEE Transactions on Signal Processing, 51, 1702-1715 (2003).

10.1109/TSP.2003.812831

S. D. Somasundaram, "Wideband robust capon beamforming for passive sonar," IEEE J. Oceanic Eng. 38, 308-322 (2013).

10.1109/JOE.2012.2223560

L. Godara, "The effect of phase-shifter errors on the performance of an antenna-array beamformer," IEEE J. Oceanic Eng. 10, 278-284 (1985).

10.1109/JOE.1985.1145105

N. Jablon, "Adaptive beamforming with the generalized sidelobe canceller in the presence of array imperfections," IEEE Transactions on Antennas and Propagation, 34, 996-1012 (1986).

10.1109/TAP.1986.1143936

Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 38
No :2
Pages :145-153
Received Date : 2019-12-03
Accepted Date : 2019-03-26
DOI :https://doi.org/10.7776/ASK.2019.38.2.145

The Journal of the Acoustical Society of Korea ISSN:1225-4428(Print) 2287-3775(Online) 한국음향학회지

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