DMCA
Analysis, optimization, and implementation of low-interference wireless multicarrier systems (2007)
| Venue: | IEEE Trans. Wireless Commun |
| Citations: | 28 - 6 self |
BibTeX
@ARTICLE{Matz07analysis,optimization,,
author = {G Matz and D Schafhuber and K Gröchenig and M Hartmann and F Hlawatsch},
title = {Analysis, optimization, and implementation of low-interference wireless multicarrier systems},
journal = {IEEE Trans. Wireless Commun},
year = {2007},
pages = {1921--1931}
}
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Abstract
Abstract-This paper considers pulse shaping multicarrier (MC) systems that transmit over doubly dispersive fading channels. We provide exact and approximate expressions for the intersymbol and intercarrier interference occuring in such systems. This analysis reveals that the time and frequency concentration of the transmit and receive pulse is of paramount importance for low interference. We prove the (nonobvious) existence of such jointly concentrated pulse pairs by adapting recent mathematical results on Weyl-Heisenberg frames to the MC context. Furthermore, pulse optimization procedures are proposed that aim at low interference and capitalize on the design freedom existing for redundant MC systems. Finally, we present efficient FFT-based modulator and demodulator implementations. Our numerical results demonstrate that for realistic system and channel parameters, optimized pulse-shaping MC systems can outperform conventional cyclic-prefix OFDM systems.
