Comparative Performance Analysis OWDM over OFDM in DVB-T for Rayleigh Channel

The scarcity of radio spectrum has become problem in many applications that utilize the higher Radio Frequencies (RF). It is therefore important to manage this resource carefully to avoid the waste. In order to optimize the RF spectrum, in 1997, The United Kingdom launched the world’s first commercial digital terrestrial television service, aimed to switch off the analogue services between 2008 and 2012. The underlying technology was OFDM that comprises of an Inverse Fast Fourier Transform (IFFT) at the transmitter and an FFT at the receiver, which performs the frequency division multiplexing. By doing so, a large number of RF channels can be accommodated for either more television services or for other applications [1]. The large size of the FFT cores was the main cause for delay in implementing OFDM in consumer devices. Along with its inherent advantages, OFDM suffers from being inflexible to the system and also, there are only small numbers of parameters that can be changed to suit the channel. The use of filters in the wavelet domain has been predominantly used for multi-resolution analysis of time varying signals. This system is termed Orthogonal Wavelet Division Multiplex (OWDM). In this paper the implementation of OWDM is focused in place of OFDM in DVB-T, and results are presented in computer simulation using Matlab; a highly efficient tool for different mathematical applications Keywords—OWDM, MCM, Rayleigh Channel, Gaussian Channel, Bit Error Rate