An Efficient Design of One and Two-Dimensional DWMT-MCM

Abstract

Primarily two areas of research progress are made in this paper: Discrete Wavelet Transform based Multicarrier Modulation (DWT-MCM), and the Discrete Wavelet Multitone based Multicarrier Modulation (DWMT-MCM). In this work, an efficient design of one and two-dimensional DWT-MCM is proposed for DWMT-MCM. Different channel conditions for different environments are simulated. Various wavelet families are employed with DWMT-MCM system. Additionally, bit error probability is compared to the familiar Orthogonal Frequency Division Multiplexing (OFDM) system for AWGN, Rayleigh flat fading, and frequency selective fading channels. The obtained outcomes demonstrate that the probability of error in the DWMT-MCM system is improved in manyscenarios, even though the guard interval (Cyclic Prefix (CP)) is not used, which leads to increase the spectral efficiency. The results also demonstrate that there is an error floor for some families of wavelet trans form. The obtained simulation results for DWMT-MCM system have significantly improved compared with conventional OFDM system in many scenarios and the proposed approach able to mitigate error floors introduced by channel variation effectively as well as the insufficient CP with high bandwidth efficiency.

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