An Application of Multi Wavelets in Wireless Communication In The Presence Of Frequency Selective Fading

Abstract

Multi wavelet multiplexing is a signal transmission technique in which the message symbols are coded onto the multiplicity `R' wavelet basis functions for transmission. The proposed transmission scheme comes under the class of orthogonally multiplexed communication. The use of multiplicity `R' wavelet basis functions enhances the data transmission rate. On the other hand, the property of orthogonality enables the design of a simple correlation receiver. The use of `L' scale multiplicity `R' multi-wavelet multiplexing along with matched filtering at the receiver effectively converts a frequency selective fading channel into `RL' flat fading channels. We have examined the performance of this multiplexing scheme from a rate-diversity trade-off point of view. Further, a simple channel estimation technique for lower data rates has been proposed