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Wavelet Based Alternative Modulation Scheme Provides Better Reception with Fewer Errors and Good Security in Wireless Communication

Authors:
Ramachandran Hariprakash
Raju Balaji
Sabapathy Ananthi
Krishnaswami Padmanabhan

Keywords: Data encoding; PSK Modem; Wavelet functions; Daubechie Wavelet; Bit Error Rate.

Abstract:
In this paper, a different scheme of encoding digital data using wavelet functions instead of sinusoidal waves is explained. Data communications use various modes of encoding the data bits into a frequency signal. Phase shift keying of various forms such as Binary Phase Shift Keying, Quaternary Phase Shift Keying, etc., are in vogue in several current communication schemes, such as Global system for mobile communication. Errors in bits at the received end through a wireless channel are common in such data communication. These errors are mainly caused by improper phase changes in the detected audio signal. Since the method presented here with the use of wavelet functions provides several clues for identification of the data symbol instead of just by one criterion viz., the phase of the carrier as in the Phase shift keying schemes, this method is found to be better in performance. Simulation of the scheme was made with Matlab and the results provide an improved bit error ratio. Also, by varying the wavelets as per the user’s choice, provides a higher level of security.

Pages: 50 to 57

Copyright: Copyright (c) IARIA, 2013

Publication date: October 27, 2013

Published in: conference

ISSN: 2163-9027

ISBN: 978-1-61208-305-6

Location: Venice, Italy

Dates: from October 27, 2013 to October 31, 2013