A Novel Digital Communication Techniques using Daubechies Scaling Functions for Modulation

摘要

Encoding digital data with pure sinusoidal wave segments of varying amplitudes and phase is being done in all digital communication methods. This paper describes the use of wavelet signals. It is shown how to use the Daubechie's waveforms for encoding multiple bits in a symbol. Methods of decoding are better here because of several criteria available with wavelet signals for comparative detection. Among multi-carrier digital modulation schemes such as IEEE802.11a/g, there is good scope for trying alternative waveforms other than the phase shifted sinusoids for the symbols. Daubechie's scaling functions provide such an alternative to provide for more variations than the usual QPSK/QAM waveforms. The properties of these novel signals enable easier decoding with more bits per symbol than the 64QAM and 128QAM currently used in DVB-C TV systems. This paper also describes the method and illustrates the advantages in implementing such a scheme even in the existing TV and microwave digital communication links.