학술논문
Oversampled orthogonal and biorthogonal multicarrier modulations with perfect reconstruction
Document Type
Conference
Author
Source
2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628) Digital signal processing Digital Signal Processing, 2002. DSP 2002. 2002 14th International Conference on. 2:647-650 vol.2 2002
Subject
Language
Abstract
A new system of multicarrier modulation is described, which takes advantage of the biorthogonality property, to generalize the oversampled OFDM technique into a biorthogonal frequency division multiplex scheme named BFDM/QAM. A discrete-time analysis of this scheme leads to a discrete model of modulated transmultiplexer. Using a polyphase decomposition of this transmultiplexer, and assuming a distortion free channel, we determine the mathematical conditions on the prototype filters, allowing an exact cancellation of intersymbol and interchannel interference, i.e. a perfect reconstruction. Then, computationally efficient realizations of the modulators and demodulators are given. Lastly, some design examples are provided.