Wavelets for baseband coding of waveforms
Prashant P. Gandhi, Sathyanarayan S. Rao, Ravikanth Pappu · 2002
We consider a novel baseband waveform coding technique based on wavelets. Wavelets are recognized for their temporal and spectral localization and for their orthogonality across scale and location. We exploit these fundamental properties of wavelets and propose a wavelet-based modulator-demodulator structure to improve communication efficiency. Numerical results for bandwidth occupancy and bandwidth efficiency are given, and a detailed comparison between different families of wavelets is presented. A codec based on the Battle-Lemarie wavelet is shown to outperform traditional BPSK-, QPSK- and MSK-based codecs as well as codecs based on Daubechies wavelets.