Range estimation of underwater vehicles using superimposed chirp signals

Hyung-in Ra; Kyung-won Lee; Chang-hyun Youn; Ki-man Kim

doi:10.7776/ASK.2023.42.6.511

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2023 Vol.42, Issue 6 Preview Page Next Page

Research Article

Range estimation of underwater vehicles using superimposed chirp signals 중첩된 처프 신호를 이용한 수중 이동체의 거리 추정

30 November 2023. pp. 511-518

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Abstract

Accurate ranging is one of the key factors in the test and evaluation process of underwater vehicles. In particular, when estimating range using Time of Arrival (ToA) values, signals such as Linear Frequency Modulation (LFM), a chirp signal, are highly applicable due to their correlated nature. However, in a Doppler shift environment with mobility, measurement errors may occur due to the range-Doppler coupling effect. In this paper, we propose a signal that compensates for the distance-Doppler coupling effect to reduce the measurement error of the arrival time value. The proposed signal is constructed by superimposing two types of LFM signals, and the range-Doppler coupling effect can be minimized. Through simulations, it is confirmed that the proposed signal is a way to compensate for the distance-Doppler coupling effect in the distance estimation of underwater mobile bodies, reducing the measurement error of the arrival time value.

Keywords

Time of arrival estimation

Linear Frequency Modulation (LFM)

Range-Doppler coupling

Doppler shift

Range estimation

수중 이동체의 시험평가 과정에서 정확한 거리 추정은 중요한 요소 가운데 하나이다. 특히, 도달 시간 값을 이용하여 거리를 추정하는 경우 상관 특성 등으로 인해 처프 신호인 Linear Frequency Modulation(LFM)과 같은 신호의 적용성이 높다. 하지만 이동성이 있는 도플러 천이 환경에서는 거리-도플러 커플링 효과로 인하여 측정 오류가 발생할 수 있다. 이에 본 논문에서는 거리-도플러 커플링 효과를 보상하여 도달 시간 값의 측정 오류를 감소시키는 신호를 제시한다. 제안된 신호는 2종류의 LFM 신호를 중첩하여 구성하였으며, 거리-도플러 커플링 효과를 최소화할 수 있다. 시뮬레이션을 통해 제안된 신호가 수중 이동체의 거리 추정에 있어서 거리-도플러 커플링 효과를 보상하여 도달 시간 값의 측정 오류를 줄이는 방법임을 확인하였다.

키워드

도달 시간 추정

선형 주파수 변조

거리-도플러 커플링

도플러 천이

거리 추정

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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 : 42
No :6
Pages :511-518
Received Date : 2023-07-06
Revised Date : 2023-07-27
Accepted Date : 2023-08-21
DOI :https://doi.org/10.7776/ASK.2023.42.6.511

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

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