Adaptive beamforming of triplet arrays for active sonar systems

Jae-Kyun Ahn; Yongwoo Ryu; Seung-Yong Chun; Seongil Kim

doi:10.7776/ASK.2018.37.1.066

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2018 Vol.37, Issue 1 Preview Page Next Page

Adaptive beamforming of triplet arrays for active sonar systems 능동소나 시스템을 위한 삼중 배열의 적응 빔형성

31 January 2018. pp. 66-72

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Abstract

In this paper, we propose an adaptive beamforming algorithm of triplet arrays for active sonar systems. The proposed algorithm consists of three steps: matched filters, cardioid beamforming, and line array beamforming. First, we apply a matched filter of a transmitted pulse to received individual sensor signals and obtain filterd signals. Then, we perform the fast Fourier transform to the matched filter results, and make a cardioid beam for each triplet data, respectively. Finally, we apply an adaptive beamforming by assuming that the cardioid beams are input signals of a line array. Experimental results demonstrate that the proposed algorithm provides better performances than conventional algorithms.

Keywords

Cardioid beamforming

Adaptive beamforming

Triplet arrays

Active sonars

본 논문에서 우리는 능동소나 시스템에서 삼중 배열의 적응 빔형성 기법을 제안한다. 제안하는 기법은 정합필터, 카디오이드 빔형성, 선배열 빔형성으로 구성된 3단계의 과정을 통해 빔형성을 수행한다. 먼저, 송신 펄스에 대한 정합필터를 개별 수신 센서 신호에 적용하여 필터링된 신호를 획득한다. 그리고 정합필터 출력에 푸리에 변환을 적용하고, 각 삼각 센서 별 카디오이드 빔을 형성한다. 최종적으로 삼각 센서에 대한 카디오이드 빔들을 선배열 신호의 입력으로 가정하여 선배열 적응 빔형성을 적용한다. 실험 결과를 통해 제안하는 방법의 성능이 기존 기법보더 더 우수함을 확인한다.

키워드

카디오이드 빔형성

적응 빔형성

삼중 배열 소나

능동 소나

References

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A. Elnashar, S. M. Elnoubi, and H. A. El-Mikati, “Further study on robust adaptive beamforming with optimum diagonal loading multiple broad-band source location using steered covariance matrices,” IEEE Trans. Antennas and propag. 54, 3647-3658 (2006).

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J. -K. Ahn, Y. Ryu, S. -Y. Chun, and S. Kim, “Robust adaptive beamforming for triplet sonar arrays” (in Korean), J. Acoust. Soc. Kr. 36, 115-122 (2017).

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 : 37
No :1
Pages :66-72
Received Date : 2017-11-21
Revised Date : 2017-12-18
Accepted Date : 2018-01-30
DOI :https://doi.org/10.7776/ASK.2018.37.1.066

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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