Multipath Effects on High-Frequency Coherent Acoustic Communications in Shallow Water
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Title
- Multipath Effects on High-Frequency Coherent Acoustic Communications in Shallow Water
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Author(s)
- Son, Su-Uk; Kim, Hyeonsu; Joo, Jongmin; Choi, Jee Woong
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Alternative Author(s)
- 주종민
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Publication Year
- 2013-07
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Abstract
- Shallow-water acoustic communication channel, referred to as a multipath-limited channel, produces inter-symbol interference that poses a significant obstacle to reliable communication. Accordingly, signal-to-multipath ratio (SMR), rather than signal-to-noise ratio (SNR), becomes an important factor affecting communication performance. However, it is difficult to estimate SMR from measured communication data, especially at higher frequency (> 10 kHz) because many arrivals scattered from rough ocean boundaries produce a significant intrapath time spreading, which acts as random noise in communication. In this paper, the energy fraction of the channel impulse response existing in one symbol duration is proposed as a parameter for estimating the quality of shallow-water communication channels. This parameter is compared with the bit-error-rate performance for data acquired in shallow water off the south coast of Korea, where the water depth is 45 m and the bottom consists of sandy clay sediment. The results imply that the energy fraction in one symbol duration may be used as a parameter for describing shallow-water communication channels and applied to the quick decision of a symbol or bit rate in a shallow-water field for reliable underwater communication. (c) 2013 The Japan Society of Applied Physics
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ISSN
- 0021-4922
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/3158
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DOI
- 10.7567/JJAP.52.07HG03
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Bibliographic Citation
- JAPANESE JOURNAL OF APPLIED PHYSICS, v.52, no.7, 2013
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Publisher
- IOP PUBLISHING LTD
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Subject
- DECISION-FEEDBACK EQUALIZER; EXPERIMENT KAUAIEX; CHANNEL; VARIABILITY; SIMULATION
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Type
- Article
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Language
- English
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Document Type
- Article
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