Performance comparison of Orthogonal Wavelet Division Multiplexing (OWDM) system using discrete wavelet transform and wavelet packet transform on Rayleigh channel

Orthogonal Wavelet Division Multiplexing is a multicarrier technique based on wavelet transform. It is an alternative technique of Orthogonal Frequency Division Multiplexing System in wireless communication. Fourier transform and invers Fourier transform of OFDM are exchanged by wavelet transform and inverse wavelet transform. The OWDM Scheme is consists of filter bank decomposition as modulator on transmitter and filter bank reconstruction as demodulator on receiver. The advantages of OWDM system are not only reduces complexity of Fourier Transform on OFDM system but also offers flexibility and optimal resolution. This paper compared two schemes of OWDM system using discrete wavelet transform and packet wavelet transform. The results show that performances of OWDM system based discrete wavelet is better than wavelet packet. However, the sub-band numbers of discrete wavelet cannot be as large as wavelet packets. This is due to the bandwidth divisions on OWDM based discrete wavelet are not same for each level of decomposition and reconstruction process.