Performances of Orthogonal Wavelet Division Multiplex (OWDM) System Under AWGN, Rayleigh and Ricean ChannelConditions

摘要

Orthogonal Wavelet Division Multiplexing (OWDM) has been considered as an alternative of OrthogonalFrequency Division Multiplexing (OFDM) in the recent years. OWDM has lower computational complexityand higher flexibility compared to its OFDM counterpart. The core component of OWDM is wavelet.Wavelet has been a much investigated and applied topic in digital image processing for a long time.Recently, it has drawn considerable attention of the researchers working in communication field. In thiswork we investigate the performances of OWDM under different channel conditions. We consider threechannel conditions namely Additive White Gaussian Noise (AWGN), Rayleigh, Ricean, and frequencyselective. We consider a number of wavelets namely Haar, Daubechies, Biorthogonal, ReverseBiorthogonal, Coiflets, and Symlets in OWDM design. For system model we choose Digital VideoBroadcasting-Terrestrial (DVB-T). Originally DVB-T system was designed based on OFDM. In this workwe use OWDM instead. The simulation results show OWDM outperforms OFDM in terms of bit error rate(BER), noise resiliency, and peak-to-average ration. The results also show that the Haar wavelet basedOWDM outperforms other wavelets based OWDM system under all three considered three channelconditions.