MIMO UWB Systems based on Linear Precoded OFDM for Home Gigabit Applications

Antoine Stephan (1) , Jean-François Hélard (2) , Bernard Uguen (2)

1 IETR - Institut d'Electronique et de Télécommunications de Rennes
2 IETR - Institut d'Électronique et des Technologies du numéRique

In this paper, we investigate the use of multiple-input multiple-output (MIMO) techniques with linear precoded orthogonal frequency division multiplexing (LP-OFDM) waveform for high data rate ultra-wideband (UWB) systems. This scheme is an evolution of the multiband OFDM (MB-OFDM) solution supported by the WiMedia Alliance. The aim of this paper is to obtain a very high data rate of around one gigabit for home access networks (HAN) and to improve the system range for lower data rates, while not significantly increasing the system complexity compared to the WiMedia solution. Firstly, a single-input single-output (SISO) LP-OFDM system study is led to high-light the benefits of adding a precoding function to an OFDM signal in the UWB context. In an analytical study, different sys-tem choices and parameterization strategies are proposed in or-der to minimize the mean bit-error-rate (BER) and consequently improve the system range. Secondly, a MIMO scheme is added and global system simulations are performed on a proposed new geometric statistic MIMO channel model. We show that the pro-posed system can considerably improve the system range at low data rates, and can reach very high data rates up to 1 Gbit/s with comparable BER performances to WiMedia.

Mots clés: Linear precoded OFDM; Mean BER; MIMO; UWB; WiMedia

Domaines: Electronique

Antoine Stephan, Jean-François Hélard, Bernard Uguen. MIMO UWB Systems based on Linear Precoded OFDM for Home Gigabit Applications. IEEE Global Communications Conference (GLOBECOM'08), Dec 2008, New Orleans, United States. ⟨hal-00325635⟩