Transmission of DWT Image over OFDM Fading Channel with Channel State Feedback

In OFDM system the transmission in fading channel is the challenging issue. Due to this fading, subset of carriers may be affected and they are cancelled at the receiver and it is also not possible to retransmit the lost packet. If the channel state information is available at the transmitter it is easy to retransmit the data by mapping and give the description effectively onto the good sub carrier and eliminate the bad sub carries which produces high channel error at the receiver. This paper describes the saving of energy approach for transmission of first level discrete wavelet transformed (DWT) based compressed image over fading channel. With the availability of channel state information at the transmitter and the description based on the descending order priority. This will reduce the consumption of power in the system, by dropping the data onto the bad subcarriers with mapped description at the transmitter. The parameter that were analyzed for system power consumption without effecting the data are in terms of peak signal-noise ratio(PSNR), distortion, Bit error rate(BER) are simulated using MATLAB. It gives 60% of energy saving.