@inproceedings{d654a8a68c4c413d8deac67e1d442691,
title = "Performance enhancement of random unitary beamforming based multiuser MIMO systems with optimum combining",
abstract = "Random unitary beamforming (RUB) is an attractive low-complexity transmission scheme for multiuser MIMO broadcast channel. When there are a moderate number of users in the system, the sum rate performance of this signaling scheme becomes mainly interference-limited over high signal-to-noise ratio (SNR) region. In this paper, we study the performance of RUB-based multiuser MIMO systems when optimum combining is employed at mulitple-antenna mobile receivers to suppress multiuser interference. We adopt a geometric approach to derive the statistics of the output signal-to-interference ratio (SIR) of the optimum combiner, based on which a sum rate upper bound is obtained over high SNR region. We show through selected numerical examples that the proposed RUB with optimal combining achieves much better sum rate performance while maintaining low feedback load.",
keywords = "And wireless communications, MIMO broadcast channel, Multiuser diversity, Optimum combining, Random unitary beamforming, Sum- Rate capacity",
author = "Peng Lu and Yang, {Hong Chuan} and Ko, {Young Chai}",
year = "2008",
doi = "10.1109/GLOCOM.2008.ECP.853",
language = "English",
isbn = "9781424423248",
series = "GLOBECOM - IEEE Global Telecommunications Conference",
pages = "4447--4451",
booktitle = "2008 IEEE Global Telecommunications Conference, GLOBECOM 2008",
note = "2008 IEEE Global Telecommunications Conference, GLOBECOM 2008 ; Conference date: 30-11-2008 Through 04-12-2008",
}