Correlation and capacity of measured multi-user MIMO channels (2008)
| Venue: | in Proc. IEEE Intl. Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC |
| Citations: | 6 - 5 self |
BibTeX
@INPROCEEDINGS{Kaltenberger08correlationand,
author = {Florian Kaltenberger and David Gesbert and Marios Kountouris},
title = {Correlation and capacity of measured multi-user MIMO channels},
booktitle = {in Proc. IEEE Intl. Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC},
year = {2008}
}
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Abstract
Abstract—In multi-user multiple-input multiple-output (MU-MIMO) systems, spatial multiplexing can be employed to increase the throughput without the need for multiple antennas and expensive signal processing at the user equipments. In theory, MU-MIMO is also more immune to most of propagation limitations plaguing single-user MIMO (SU-MIMO) systems, such as channel rank loss or antenna correlation. However, in this paper we show that this is not always true. We compare the capacity and the correlation of measured MU-MIMO channels for both outdoor and indoor scenarios. The measurement data has been acquired using Eurecom’s MIMO Openair Sounder (EMOS). The EMOS can perform real-time MIMO channel measurements synchronously over multiple users. The results show that in most scenarios MU-MIMO provides a higher throughput than SU-MIMO also in the measured channels. However, in outdoor scenarios with a line of sight, the capacity drops significantly when the users are close together, due to high correlation at the transmitter side of the channel. In such a case, the performance of SU-MIMO and MU-MIMO is comparable. I.
