PAPR comparison Of OWDM and OFDM system

PAPR is the ratio of peak power of the signal with average power. Large PAPR value causes difficulty in the implementation of power amplifier device and higher cost of implementation. Recently it has been developed a system as an alternative to multicarrier 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. One of the weaknesses of OFDM is high PAPR value, so in this study the PAPR value of OFDM and OWDM system will be compared. Simulation PAPR in OWDM and OFDM systems show that more number of sub-bands cause higher PAPR value, but PAPR of OWDM is smaller than OFDM system.