Comparison performance analysis of OWDM and OFDM system on multipath fading Rayleigh channel

Abstract

Improvement of information technology especially in telecommunication system support wireless communication system must provide high data rate service. OFDM is the system that have high data rate and had been used as the method to overcome multiple channel effect But the weakness of OFDM system is PAPR. Large PAPR causes non linear distortion of signal and non orthogonal of sub carrier that caused performance of OFDM system will decrease. Recently, it has been developed a system as an alternative to OFDM system called OWDM (Orthogonal wavelet division multiplex). Basic idea of OWDM is replaced Inverse Discrete Fourier Transform (IDFT) with the Inverse Discrete Wavelet Transform (IDWT) for generating orthogonal sub-carrier. Like IDFT on OFDM systems, function of IDWT on OWDM system is modulator, while demodulator process used DFT (Discrete Fourier Transform) on OFDM and DWT (Discrete Wavelet Transform) on OWDM. This paper will compare the performance between OWDM and OFDM system on fading Rayleigh channel. Simulation both of system resulted same performance on multipath Rayleigh fading channel but different PAPR value PAPR of OWDM system is smaller than OFDM system. Thus OWDM techniques can be chosen as an alternative method to overcome the problems of the high PAPR value in OFDM techniques.