A different scheme of encoding data bits in digital communication using wavelets

Abstract

Digital data communication uses various modes of encoding the data bits into a frequency signal. Phase shift keying (PSK) of various forms such as Binary PSK, Quaternary PSK etc., are in vogue in several current communication schemes such as GSM. In this paper, a different scheme of encoding digital data using wavelet functions instead of sinusoidal waves is explained. Errors in bits at the received end through a radio 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 PSK schemes, this method is found to be better in performance. Simulation of the scheme was made with Matlab and some preliminary results are presented.