Efficient Algorithm of Well-Localized Bases Construction for OFTDM Systems

This article presents the research work related to the development of enhanced modulation technique with Orthogonal Time-Frequency Division Multiplexing (OFTDM). Utilization of well–localized bases allows to improve considerably the efficiency and robustness against intercarrier (ICI) and intersymbol interference (ISI) of now existing wideband wireless digital communication systems. Until recently one of the main disadvantages of well-localized bases was the complexity of their construction algorithm. This fact restricted the area of their practical implementation. The algebraic procedure of orthogonal well-localized WeylHeisenberg basis construction is considered in the paper. Several basis orthogonality conditions are observed. They allow to formulate computationally efficient orthogonalization procedure on the base of fast Fourier transform. This approach can receive wide implementation in wideband mobile networks (Wi-Max), digital television (DVB-T/H) and other telecommunication systems.