Dominant eigenmode transmission in MIMO FBMC for frequency-selective channels
(2014) 35th WIC Symposium on Information Theory in the Benelux — Location: Eindhoven (12.May.2014)
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- Authors
Rottenberg, François 
- Abstract
- In this paper, we consider a MIMO transmission using FBMC (filter-bank based multicarrier) modulation where channel state information (CSI) is assumed to be available at the transmitter. The so-called dominant eigenmode transmission (DET) scheme is investigated. This technique uses a joint beamforming scheme to transmit a single stream of data and can extract both full spatial diversity and a high array gain. It has already been shown that it can be applied to the FBMC modulation if the channel is not too selective in frequency. The paper then aims at comparing the performance of the DET technique with FBMC (more precisely the OFDM/OQAM version) and OFDM respectively, in a variety of channels including highly frequency selective channels. It is known that FBMC outperforms OFDM in mildly selective channels thanks to its better energy-efficiency. The paper investigates the effect of higher frequency selectivity on the DET technique both in the case of FBMC and OFDM. It is shown that FBMC slightly suffers from inter-carrier and inter-symbol interference while OFDM robustness heavily depends on the cyclic prefix length. To improve the FBMC behavior against channel selectivity, a low complexity per-subcarrier equalizer is designed based on the frequency sampling (FS) technique. The paper analyzes the trade-off between energy-efficiency and robustness against frequency selective channels that the two modulation techniques offer.
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Citations
Rottenberg, F., & Louveaux, J. (2014). Dominant eigenmode transmission in MIMO FBMC for frequency-selective channels. Proceedings of the 35th WIC Symposium on Information Theory in the Benelux. Published. 35th WIC Symposium on Information Theory in the Benelux, Eindhoven. https://hdl.handle.net/2078.5/230250