NDLI: Acquisition of direct sequence spread spectrum acoustic communication signals

Content Provider	IEEE Xplore Digital Library
Author	Stojanovic, M. Freitag, L.
Copyright Year	2003
Description	Author affiliation: Massachusetts Inst. of Technol., Cambridge, MA, USA (Stojanovic, M.)
Abstract	Acquisition of the code timing in DS/SS systems is addressed for time-varying frequency-selective underwater acoustic channels. Acquisition algorithm based on adaptive channel estimation and filtering is proposed. The algorithm employs feedback of pre-cursor and post-cursor inter-chip interference to provide a channel estimate from which the code timing is acquired. The channel estimate is also used to filter the signal prior to making the acquisition decision. Channel estimation/filtering procedure eliminates the need for explicit equalization, and enables a computationally efficient implementation. Simulation results show excellent performance in low-SNR regime, as well as in the presence of multiple-access interference and fast fading.
Sponsorship	Dept. of the Navy Sci. and Technol. Coalition for Enhanced Marine Resources Orincon Ceros Harbour Offshore Inc
Starting Page	279
Ending Page	286
File Size	546576
Page Count	8
File Format	PDF
ISBN	0933957300
DOI	10.1109/OCEANS.2003.178569
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	Spread spectrum communication Underwater acoustics Timing Channel estimation Time varying systems Frequency Filtering algorithms Adaptive filters Feedback Interference
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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