한국정보통신학회논문지 (Journal of the Korea Institute of Information and Communication Engineering)

  • 제17권3호
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  • Pages.540-545
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  • 2013
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  • 2234-4772(pISSN)
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  • 2288-4165(eISSN)
한국정보통신학회 (The Korea Institute of Information and Commucation Engineering)
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Fractional Fourier 변환을 이용한 LFM 신호 분리

LFM Signal Separation Using Fractional Fourier Transform

  • 석종원 (창원대학교 정보통신공학과) ;
  • 김태환 (경북대학원 전자공학과) ;
  • 배건성 (경북대학교 전자전기컴퓨터학부)
  • 투고 : 2012.11.14
  • 심사 : 2012.12.21
  • 발행 : 2013.03.31
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초록

Fractional 푸리에변환(Fractional Fourier Transform : FRFT)은 기존의 푸리에 변환의 일반화된 형태로서, 양자역학분야에서 처음 소개되었다. FRFT가 가지는 시간-주파수 영역에서의 단순하면서도 유용한 특성으로 인하여, 지금까지 소나 및 레이더 신호처리 분야에서 많은 연구결과들이 발표되었으며, 푸리에 변환을 활용한 기존의 방법보다 우수한 연구결과를 보여 왔다. 본 논문에서는 LFM(Linear Frequency Modulation)신호들이 겹쳐져 수신되었을 경우에 이들 신호들을 검출하고 분리하기 위해 FRFT를 이용하였다. 실험결과 수신된 LFM 신호들을 FRFT 영역에서 효율적으로 검출하고 분리가 가능함을 확인하였다.

The Fractional Fourier transform, as a generalization of the classical Fourier Transform, was first introduced in quantum mechanics. Because of its simple and useful properties of Fractional Fourier transform in time-frequency plane, various research results in sonar and radar signal processing have been introduced and shown superior results to conventional method utilizing Fourier transform until now. In this paper, we applied Fractional Fourier transform to sonar signal processing to detect and separate the overlapping linear frequency modulated signals. Experimental results show that received overlapping LFM(Linear Frequency Modulation) signals can be detected and separated effectively in Fractional Fourier transform domain.

키워드

참고문헌

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피인용 문헌

  1. Estimation of target distance based on fractional Fourier transform analysis of active sonar linear frequency modulation signals vol.35, pp.1, 2016, https://doi.org/10.7776/ASK.2016.35.1.008