The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
권호 표지

Adaptive Chirp Beamforming for Direction-of-Arrival Estimation of Wideband Chirp Signals in Sensor Arrays

광대역 chirp 신호의 방위각 추정을 위한 적응 빔 형성

  • 김정수 (경북대학교 전자전기컴퓨터학부) ;
  • 최병웅 (경북대학교 전자전기컴퓨터학부) ;
  • 배은현 (경북대학교 전자전기컴퓨터학부) ;
  • 이균경 (경북대학교 전자전기컴퓨터학부)
  • Published : 2008.02.29
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Abstract

In this paper, the adaptive chirp beamforming method is proposed to solve the bias problem in the direction-of-arrivals (DOAs) estimation of the wideband chirp signals which have an identical time-frequency parameter and are emanated from different directions. The source location bias results from the interferences impinging on the array from the other directions. The proposed method exploits the time-frequency structure of the chirp signal based on STMV (STeered Minimum Valiance) to improve the DOA estimation performance by minimizing the chirp interferences effectively. Simulation results show the DOA estimation performance achieved by the proposed method as compared to the conventional methods.

본 논문은 동일한 주파수 파라미터를 가지고 다른 방위에서 입사하는 chirp신호의 방위각 (DOA : Direction-of-arrival) 추정에서 상호 간섭으로 인한 bias문제를 해결하기 위하여 적응 chirp 빔형성기법을 제안한다. 제안한 기법은 기존의 STMV (STeered Minimum Variance)기법에 chirp 신호의 시간-주파수 특성을 고려함으로써 chirp신호들의 상호 간섭을 보다 효과적으로 감소시켜 방위각 추정성능을 향상시킨다. 모의 실험에서 제안한 기법과 기존의 기법들에 의한 방위각 추정성능을 비교한다.

Keywords

References

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