International Journal of Engineering and Technology

This study aims at enhancing the performance of the Multiband OFDM system by implementing various techniques. As a first step the Fast Fourier Transform and Inverse Fast Fourier Transform blocks are alternated by Wavelet transform. The main advantage of wavelet transform is the need of cyclic prefix is eliminated as it takes care of Inter symbol interference (ISI) and Inter carrier interference ICI). Second it up thrusts its positions in terms of an efficient system adhering to high data rates only when the order of the wavelet families involved in the process remains conducive. In wireless system the channel being air, is prone to noise, Owing to which the output of the channel is erroneous. As a consequence the error control codes are used which targets at removing the errors from the transmitted bit. Single error control codes are not suitable for high noisy conditions and as a consequence to improve the coding gain concatenation of error control codes is preferred. This study focusses on concatenating convolutional codes with turbo codes. All these techniques enhance the performance of the Multiband OFDM system and make it more appropriate for high data rate wireless applications. In addition the system is trained using neural network .The system is trained using Back propagation algorithm.