대한전자공학회논문지SP (Journal of the Institute of Electronics Engineers of Korea SP)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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간섭 및 반향신호 제거를 위한 다단계 구조의 다채널 암묵 디콘볼루션

Multichannel Blind Deconvolution of Multistage Structure to Eliminate Interference and Reverberation Signals

  • 임정우 (충북대학교 전파통신공학과) ;
  • 정규혁 (충북대학교 전파통신공학과) ;
  • 주기호 (배재대학교 정보통신공학과) ;
  • 김영주 (충북대학교 전파통신공학과) ;
  • 이인성 (충북대학교 전파통신공학과)
  • Lim, Joung-Woo (Dept. of Radio and Communications Engineering, Chungbuk National University) ;
  • Jeong, Gyu-Hyeok (Dept. of Radio and Communications Engineering, Chungbuk National University) ;
  • Joo, Gi-Ho (Dept. of Informations and Communications Engineering, Paichai University) ;
  • Kim, Young-Ju (Dept. of Radio and Communications Engineering, Chungbuk National University) ;
  • Lee, In-Sung (Dept. of Radio and Communications Engineering, Chungbuk National University)
  • 발행 : 2007.01.25
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초록

다채널 암묵 디콘볼루션을 자기상관 값이 큰 신호에 적용할 경우 분리필터행렬의 주대각 성분에 의해서 분리신호의 시간백색화가 발생한다. 이러한 왜곡을 줄이기 위해 분리필터 행렬의 주대각 성분을 강제하거나 선형예측 잔여신호를 이용하여 분리필터 행렬을 구하는 방법들이 제안되었지만 신호자신의 반향성분이나 간섭신호 분리에 있어서 문제점이 발생된다. 본 논문에서는 이러한 문제들을 해결하기 위해서 간섭신호의 분리를 위한 단계와 신호자신의 반향을 감소시키기 위한 단계를 분리하여 처리하는 구조의 다채널 암묵 디콘볼루션 방법을 제안한다. 모의실험 결과 혼합신호에서 간섭신호를 분리해낼 수 있을 뿐만아니라 신호 자신의 반향 또한 감소됨을 확인하였다.

In case that multichannel blind deconvolution (MBD) applies to signals of which autocorrelation has a high level, separated signals are temporally whitened by diagonal elements of a separation filter matrix. In order to reduce this distortion, the algorithms, which are based on either constraining diagonal elements of a separation filter matrix or estimating a separation filter matrix by using linear prediction residual signals, are presented. Still, some problems are generated in these methods, when we separate reverberation of signals themselves or interference signals from mixed signals. To solve these problems, this paper proposes the multichannel blind deconvolution method which divides processing procedure into the stage to separate interference signals and the stage to eliminate a reverberation of signals themselves. In simulation results, we confirm that the proposed algorithm can solve the problems.

키워드

참고문헌

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