Doppler shift frequency estimation and compensation in underwater acoustic communication using triangle spread carrier technique

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

doi:10.7776/ASK.2023.42.3.169

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2023 Vol.42, Issue 3 Next Page

Research Article

Doppler shift frequency estimation and compensation in underwater acoustic communication using triangle spread carrier technique Triangle spread carrier 기법을 이용한 수중음향통신에서 도플러 천이 주파수 추정 및 보상

31 May 2023. pp. 169-180

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Abstract

The performance of underwater acoustic communication is greatly affected by multipath propagation and Doppler spread. This paper proposes a new communication technique, the Triangle Spread Carrier (TSC) technique, by modifying the existing Sweep Spread Carrier (SSC) technique that is strong in a multipath propagation environment. The proposed TSC technique is a form in which the up-chirp and down-chirp signals have repeated carriers, and each correlation function characteristic is used to estimate and correct the Doppler shift frequency of the receiving signal. To demonstrate the performance of the proposed TSC technique, we present the results of simulations using underwater channel simulators and sea trial conducted in the East Sea. When demodulating using only the estimated Doppler shift frequency as a result of the sea trial, the uncoded bit error rate was up to 0.194, but when the proposed method was applied, the uncoded bit error rate was reduced to 0.001.

Keywords

Underwater acoustic communication

Sea trial

Multipath propagation

Doppler shift frequency

Nonlinear least square curve fitting

수중음향통신의 성능은 다중경로 전달과 도플러 확산에 크게 영향을 받는다. 본 논문은 다중경로 전달 환경에서 강인한 기존의 Sweep Spread Carrier(SSC) 기법을 변형하여, 새로운 통신기법인 Triangle Spread Carrier(TSC) 기법을 제안한다. 제안한 TSC 기법은 상승-처프와 하강-처프 신호가 반복되는 반송파를 갖는 형태이며, 각각의 상관함수 특성을 활용하여 수신 신호의 도플러 천이 주파수를 추정하고 보정한다. 제안된 TSC 기법의 성능을 입증하기 위하여 수중 채널 시뮬레이터를 이용한 모의실험과 동해에서 수행된 해상실험을 결과를 제시한다. 해상실험 결과 추정된 도플러 천이 주파수만을 이용하여 복조하였을 때 비부호화 된 비트 오류율은 최대 0.194였지만, 제안한 방법을 적용하였을 때 비부화화된 비트 오류율이 0.001로 감소하였다.

키워드

수중음향통신

해상실험

다중경로 전달

도플러 천이 주파수

비선형 최소 제곱 곡선 적합

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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 :3
Pages :169-180
Received Date : 2023-04-11
Revised Date : 2023-05-01
Accepted Date : 2023-05-08
DOI :https://doi.org/10.7776/ASK.2023.42.3.169

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

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