Analysis of underwater acoustic communication channel environment in Kyungcheon Lake

Yong-Cheol Kim; Jong-Min An; Ho-Jun Lee; Sang-Kug Lee; JaeHak Chung

doi:10.7776/ASK.2019.38.1.001

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2019 Vol.38, Issue 1 Next Page

Research Article

Analysis of underwater acoustic communication channel environment in Kyungcheon Lake 경천호에서의 수중 음향 통신 채널 환경 분석

31 January 2019. pp. 1-8

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Abstract

This paper estimated communication parameters according to underwater channel environment of lake for underwater acoustic communication. This paper calculated coherence time and coherence bandwidth through two experiments in actual lake environments. In both experiments, the chirp signal for channel estimation and the BPSK (Binary Phase Shift Keying) signal for calculating the bit error rate were transmitted. In each experiment, the distance between transmitter and receiver was 300 m to 400 m, and 500 m to 600 m. The coherence times calculated in experiment 1 and experiment 2 are 175 msec and 340 msec, and the coherence bandwidths are 10 Hz and 5.71 Hz, respectively. It is confirmed that the experimental results are more appropriate because the synchronization and the bit error rate performance are better only when the length of the synchronization signal and the interval of the pilot signal in the frame are shorter than the coherence time.

Keywords

Underwater acoustic communication

Coherence time

Coherence bandwidth

Doppler effect

본 논문은 호수에서의 원활한 수중음향통신을 위해 호수의 수중 채널 환경에 따른 통신 변수들을 도출하였다. 본 논문에서는 실제 호수 환경에서의 두 번의 실험을 통하여 상관 시간과 상관 대역폭을 산출하였다. 두 번의 실험에서 채널 추정과 비트오류율 산출을 위해 chirp 신호와 BPSK(Binary Phase Shift Keying) 신호를 전송하였고, 각각의 실험은 송신단과 수신단과의 거리가 300 m에서 400 m일 때와 500 m에서 600 m일 때 진행하였다. 첫 번째 실험과 두 번째 실험에서 각각 산출한 상관 시간은 175 msec와 340 msec이고, 상관 대역폭은 10 Hz와 5.71 Hz이다. 동기 신호의 길이와 프레임 내 파일럿 신호의 간격이 상관 시간보다 짧은 경우에만 동기화와 비트오류율 성능이 더 우수하여 산출한 실험 결과가 적절함을 확인하였다.

키워드

수중 음향 통신

상관 시간

상관 대역폭

도플러 효과

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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 : 38
No :1
Pages :1-8
Received Date : 2018-10-17
Revised Date : 2018-10-30
Accepted Date : 2019-01-25
DOI :https://doi.org/10.7776/ASK.2019.38.1.001

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

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