In this paper we present an energy saving
approach to transmission of discrete wavelet transformation based compressed image frames over the OFDM channels. Based on one-bit
channel state information at the transmitter, the descriptions in
order of descending priority are assigned to the currently good channels used
in Huffman and SPHIT Encoding. Analytical
evaluation of the system in terms of probability of error is carried out in a
diffused wireless channel. As a conclusion, the
proposed system shows promising results for a high speed wireless channel and
we demonstrate the usefulness of our proposed
scheme in terms of system energy saving without compromising the received
quality in terms of peak signal to noise ratio.
Despite using more number of carriers instead subset of carriers is usable for
successful data transmission and permitting
the retransmission of lost packets. The improvements that can be realized in
various performance parameters in a digital
Communication system using wavelets. Parameters like Spectral efficiency, Mean
square error, Peak signal to noise ratio (PSNR) and bit error rate are found to improve with the help of wavelets.
Keywords: DWT; IMAGE; HUFFMAN;
SPIHT; OFDM.
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