DWT & FEC guided orthogonal frequency division multiplexing (MB-OFDM)-enhanced quality data rate

Multiband OFDM is the optimum candidate for high rate wireless applications over short distances. The aim of this contribution is to investigate the performance of convolutional code and Reed Solomon code combination for multiband OFDM cognitive radio system. Analysis showed that better performance could be achieved with RS-CC combination than single codes. Furthermore the fast Fourier transform and the inverse fast Fourier transform blocks of the multiband OFDM system is exchanged with the discrete wavelet transform and inverse wavelet transform respectively. With the use of wavelet transform the interference due to symbol spread and the interference caused by the adjacent channel can be mitigated. It also eludes the use of cyclic prefix in the OFDM system. Finally the significance of interleaver in the system is also analysed. All these techniques make the multiband OFDM system a suitable fit for personal area networks.