Cart (Loading....) | Create Account
Close category search window
 

An Underwater Acoustic Spread-Spectrum System Using RA Coding and Band-Pass Signal Acquisition

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Liu Lanjun ; Sch. of Inf. Eng., Univ. of Sci. & Technol. Beijing, Beijing, China ; Zhang Xiaotong ; Wang Qin ; Li Li

Aiming at reducing the system complexity, raising communication rate and supporting CDMA based applications, a direct sequence spread spectrum based underwater acoustic communication system is proposed. BPSK/QPSK modulation is used. A RA coding scheme is adopted to reduce the BER. To reduce the phase-acquisition complexity of receiver, a carrier modulation method which lets spread-spectrum code and carrier have the same phase is adopted in transmitter. To raise the communication rate, an architecture of de-spreading before demodulation is used in receiver. To support CDMA based applications, a band-pass signal acquisition strategy is used in receiver, and the acquisition method is delay correlation acquisition algorithm. Matlab-based simulations and practical system based experiments are carried out. The results show that the system has a good performance at supporting multi-user communication and rejecting multi-path effects. Under a water tank environment, the BER of the system without interference of other users is at 10-4 order of magnitude, and the BER of the system with interference of two users is at 10-3 order of magnitude.

Published in:

Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on

Date of Conference:

24-26 Sept. 2009

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.