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Research Article

A structure and signal processing of directional linear array for left/right discrimination in low frequency band

저주파 대역에서 좌/우 구분이 가능한 지향성배열센서 구조 및 신호처리 기법

Dae-Kyung Kim1
,
Eun-Hyon Bae1∗
,
Sang-Tae Jeon1
,
Tae-Hwan Kim2
김 대경1
,
배 은현1∗
,
전 상태1
,
김 태환2
1한화시스템 해양연구소
2국방과학연구소
∗Corresponding Author
31 July 2018. pp. 188-195
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Abstract

A new directional linear array structure and its signal processing method are presented to resolve the left/right ambiguity inherent in a linear array. The array structure combines an ordinary acoustic sensor array with a DIFAR (Directional Frequency Analysis and Recording) sensor array, keeping a linear array configuration and gaining a instantaneous left/right discrimination. It presents better PSRR (Port-Starboard Rejection Ratio) in low frequency band and low SNR (Signal to Noise Ratio) situation as compared with a conventional twin linear array, and good compromise to easily upgrade an existing linear array system to a new one with a left/right discrimination capability.

Keywords
Left/Right discrimination
Directional linear array
Acoustic sensor array
DIFAR (Directional Frequency Analysis and Recording) sensor array

본 논문은 기존 선배열센서에서 발생하는 좌/우 구분 모호성을 해결하기 위해 저주파 대역에서 좌/우 구분이 가능한 지향성배열센서 구조 및 신호처리 방안을 제안한다. 지향성배열센서는 기존 음향배열센서에 지향성을 가지는 DIFAR(Directional Frequency Analysis and Recording)배열센서를 추가 확장한 선배열센서 구조이며, 음향배열센서의 빔형성 결과와 DIFAR배열센서의 빔형성 결과를 융합/처리하는 신호처리 구조를 가진다. 이러한 지향성배열센서는 좌/우 구분이 가능한 기존의 이중 선배열센서와 비교하여 낮은 신호 대 잡음비 및 저주파수 대역에서 높은 좌/우 구분 성능을 나타낸다.

키워드
좌/우 구분
지향성배열센서
음향배열센서
DIFAR(Directional Frequency Analysis and Recording)배열센서
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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 :4
  • Pages :188-195
  • Received Date : 2018-06-08
  • Accepted Date : 2018-07-27
  • DOI :https://doi.org/10.7776/ASK.2018.37.4.188
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