NDLI: Estimating mutual information for the underwater acoustic channel

Content Provider	IEEE Xplore Digital Library
Author	Gendron, P.J.
Copyright Year	2005
Description	Author affiliation: Div. of Acoust., Naval Res. Lab., Washington, DC, USA (Gendron, P.J.)
Abstract	Estimates of upper and lower bounds on the information rates attainable for acoustic communication systems with white Gaussian sources under uncertain channel conditions are provided. These bounds account for finite duration signaling effects as well as finite coherence time and are not reliant on the presence of training data. The approach is useful in providing guidance in the selection of coding strategies based on available probe data or from propagation modeling. For the case of the coherence time of the channel exceeding that of the packet duration the estimators are computationally efficient with the use of the Levinson recursion. The reduction in the information rate relative to the known channel case is qualitatively assessed. For scenarios where the prior channel covariance is known exactly the exact bounds on the information rates are computable else the estimators provide confidence intervals for these rates. These estimators are tested on 18 kHz at sea data collected from north of Elba Italy on a 1.8 m aperture vertical array. The effects of coherence degradation as well as multi-path spread are quantified.
Starting Page	2137
Ending Page	2142
File Size	174953
Page Count	6
File Format	PDF
ISBN	0933957343
DOI	10.1109/OCEANS.2005.1640078
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Mutual information Underwater acoustics Information rates Coherence Training data Probes Recursive estimation Testing Apertures Degradation
Content Type	Text
Resource Type	Article

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