Direct-sequence spread-spectrum modulation for utility packet transmission in underwater acoustic communication networks
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Authors
Duke, Peter S.
Subjects
Acoustic communications
Underwater communications
Underwater networks
Undersea warfare
Direct-sequence spread-spectrum
Differential binary phase-shift keying
DSSS
DBPSK
DS/BPSK
Underwater communications
Underwater networks
Undersea warfare
Direct-sequence spread-spectrum
Differential binary phase-shift keying
DSSS
DBPSK
DS/BPSK
Advisors
Cristi, Roberto
Rice, Joseph
Date of Issue
2002-09
Date
September 2002
Publisher
Monterey, Calif. Naval Postgraduate School
Language
Abstract
This thesis investigates the feasibility and performance of using Direct-Sequence Spread-Spectrum (DSSS) modulation for utility-packet transmission in Seaweb underwater wireless acoustic communications networks. Seaweb networks require robust channel-tolerant utility packets having a low probability of detection (LPD) and allowing for multi-user access. MATLAB code simulated the DSSS transmitter and receiver structures and a modeled channel impulse response represented the underwater environment. The specific modulation scheme implemented is direct-sequence, differentially encoded binary phase-shift keying (DS-DBPSK) with quadrature spreading. Performance is examined using Monte Carlo simulation. Bit error rates and packet error rates for various signal-to-noise ratios and channel conditions are presented and the use of a RAKE receiver, forward error-correction coding and symbol interleaving are examined for improving system performance.
Type
Thesis
Description
Series/Report No
Department
Electrical and Computer Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
xviii, 131 p. : ill.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner