Title :
On enhancing inter-user spatial separation for downlink multiuser MIMO systems
Author :
Yi, Xinping ; Au, Edward
Author_Institution :
Mobile Commun. Dept., EURECOM, Sophia Antipolis, France
Abstract :
In practical downlink multiuser MIMO channels, users´ channels are non-orthogonal, which results in inter-user interference and in turn degrades system performance. In this paper, a new subspace-domain linear transmit preprocessing technique is proposed in enhancing users´ spatial separation and suppressing inter-user interference. We show by simulations that sum rate is significantly improved and its saturation is avoided.
Keywords :
MIMO communication; interference suppression; wireless channels; downlink multiuser MIMO channels; downlink multiuser MIMO systems; inter-user interference suppression; inter-user spatial separation; nonorthogonal channels; subspace-domain linear transmit preprocessing technique; Downlink; Interference channels; MIMO; Null space; Signal to noise ratio; Vectors;
Conference_Titel :
Communications (ICC), 2012 IEEE International Conference on
Conference_Location :
Ottawa, ON
Print_ISBN :
978-1-4577-2052-9
Electronic_ISBN :
1550-3607
DOI :
10.1109/ICC.2012.6364594
