Multipath Effects on High-Frequency Coherent Acoustic Communications in Shallow Water
- Title
- Multipath Effects on High-Frequency Coherent Acoustic Communications in Shallow Water
- Author
- 최지웅
- Keywords
- VARIABILITY; CHANNEL; EXPERIMENT KAUAIEX; DECISION-FEEDBACK EQUALIZER; SIMULATION
- Issue Date
- 2013-07
- Publisher
- IOP Publishing Ltd
- Citation
- Japanese Journal of Applied Physics, v. 52, NO. 7, article no. 07HG03, Page. 1-8
- 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
- URI
- https://iopscience.iop.org/article/10.7567/JJAP.52.07HG03https://repository.hanyang.ac.kr/handle/20.500.11754/184222
- ISSN
- 0021-4922;1347-4065
- DOI
- 10.7567/JJAP.52.07HG03
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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