NDLI: Measurements and modeling comparisons of underwater communications performance at three shallow-water sites

Content Provider	IEEE Xplore Digital Library
Author	Siderius, M. Porter, M.B. Hursky, P. McDonald, V.K.
Copyright Year	2003
Description	Author affiliation: Sci. Applications Int. Corp., San Diego, CA, USA (Siderius, M.; Porter, M.B.; Hursky, P.)
Abstract	Large differences in performance of underwater acoustic communications were found when looking at results from three shallow water sites. Using acoustic modeling, these channel responses are simulated and communications performance predictions are made. Ray based modeling is used to determine the mechanisms in the environment causing differences in bit error rates. Experimental results for the non-coherent Multi-Frequency Shift Keying (MFSK) signaling method showed better performance in very shallow water (about 5 m) with a lossy seabed compared to deeper water (about 80-150 m) with a more reflective seabed. The modeling shows that while interfering multi-path is an important mechanism for bit errors in the deeper water sites, the performance at the shallow water site depends mainly on the surface roughness, volume attenuation and ambient noise level. In this paper, simple acoustic modeling is used to capture the most important channel characteristics. The emphasis is on modeling the mulitpath arrival pattern and on the comparison between modeled and measured communications performance.
Sponsorship	Dept. of the Navy Sci. and Technol. Coalition for Enhanced Marine Resources Orincon Ceros Harbour Offshore Inc
Starting Page	1773
Ending Page	1779
File Size	775327
Page Count	7
File Format	PDF
ISBN	0933957300
DOI	10.1109/OCEANS.2003.178154
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Underwater communication Acoustic measurements Underwater acoustics Predictive models Bit error rate Performance loss Rough surfaces Surface roughness Attenuation Noise level
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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