A study on robust generalized cross correlation-phase transform based time delay estimation in impulsive noise environment using nonlinear preprocessing and frequency domain low-pass filter

Jun-Seok Lim; Keunwa Lee

doi:10.7776/ASK.2024.43.4.406

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2024 Vol.43, Issue 4 Preview Page Next Page

Research Article

A study on robust generalized cross correlation-phase transform based time delay estimation in impulsive noise environment using nonlinear preprocessing and frequency domain low-pass filter 비선형 전처리와 주파수 영역 저역 필터에 의한 임펄스성 잡음 환경에 강인한 위상 변환 일반 상호 상관 시간 지연 추정기 연구

31 July 2024. pp. 406-413

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Abstract

The proposed method uses Generalized Cross Correlation – Phase Transform (GCC-PHAT) method with nonlinear preprocessing and a frequency domain low-pass filter. In this paper, by reinterpreting the calculation process of GCC-PHAT as DFT, we derive that there is an effective frequency band used for time delay estimation in GCC-PHAT, and by using only the effective band using a low-pass filter, the noise component is reduced and it improves the time delay performance in impulsive noise environments. By comparing the proposed method with the traditional GCC-PHAT in an impulsive noise environment, we show that the GCC-PHAT becomes more robust to the impulsive noise.

Keywords

Time-delay estimation

Generalized Cross Correlation – Phase Transform (GCC-PHAT)

Low-pass filter

Impulsive noise

본 논문은 임펄스성 잡음에 견실한 시간 지연을 추정 방법을 제안한다. 제안하는 방법은 Generalized Cross Correlation – Phase Transform(GCC-PHAT) 방법에 비선형 전처리와 주파수 영역 저역 통과 필터를 사용한다. 본 논문에서는 GCC-PHAT의 연산 과정을 DFT로 다시 해석함으로써 GCC-PHAT에서 시간 지연 추정에 실제 사용되는 유효한 주파수 대역이 있음을 파악하고, 저역 통과 필터 사용하여 유효 대역만을 사용하면 잡음 성분을 줄여서 시간 추정 성능을 향상시킬 수 있음을 보인다. 제안한 방법을 임펄스성 잡음 환경에서 전통적인 GCC-PHAT와 비교함으로써 추정 견실성이 향상됨을 보인다.

키워드

시간 지연 추정

상호 상관

저역 통과 필터

임펄스성 잡음

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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 : 43
No :4
Pages :406-413
Received Date : 2024-05-01
Accepted Date : 2024-06-27
DOI :https://doi.org/10.7776/ASK.2024.43.4.406

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

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