Minimum and maximum Power Adaptation Methods using Haar Wavelet for Image Transmission using QPSK Modulation

Abstract

Abstract -This paper addresses power allocation methods for multimedia signals over wireless channels. The objective is to minimize total power allocated for image compression and transmission, while the power for each bit is kept at a predetermined value. Minimum and maximum power adaptation methods are proposed. In this work, an approach for minimizing the total power allocated of a multimedia like image due to source compression and transmission subject to a fixed bit source distortion. Simulations are performed using haar wavelet over AWGN channel using QPSK modulation.The numerical analysis shows that optimized power methods can reduce the total power allocated by a significant factor and the Bit error rate is reduced considerably compared to the Conventional equal power method