| Paper: | SPCOM-L4.1 | ||
| Session: | MIMO Training Design and Capacity Issues | ||
| Time: | Wednesday, May 17, 14:00 - 14:20 | ||
| Presentation: | Lecture | ||
| Topic: | Signal Processing for Communication: MIMO multi-user and multi-access schemes | ||
| Title: | Cramér-Rao Bound and Training Sequence Selection for MIMO-OFDMA transmissions impaired by frequency offsets | ||
| Authors: | Serdar Sezginer, Pascal Bianchi, Supélec, France | ||
| Abstract: | In this paper, we investigate the data-aided estimation of frequency offsets and channel coefficients in the uplink transmission of MIMO-OFDMA systems. A compact and informative expression of the deterministic Cramér-Rao Bound (CRB) is derived for large training sequence sizes. It is shown that the asymptotic performance bounds do not depend on the number of users. Next, we bring to the fore the training strategies which minimize the asymptotic performance bounds and which are therefore likely to lead to accurate estimates of the parameters. In particular, for a given user, it is shown that accurate frequency offset estimates are likely to be obtained by introducing relevant correlation between training sequences send at different antennas. On the otherhand, accurate channel estimation is achieved when training sequences send at different antennas are uncorrelated. | ||
©2018 Conference Management Services, Inc. -||- email: webmaster@icassp2006.org -||- Last updated Friday, August 17, 2012