A multiuser downlink system combining limited feedback and channel correlaton information

Huang, Yongming; Yang, Luxi; Bengtsson, Mats; Ottersten, Björn

doi:10.1109/ICC.2010.5502116

Reference : A multiuser downlink system combining limited feedback and channel correlaton information


	Document type :	Scientific congresses, symposiums and conference proceedings : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Computer science Engineering, computing & technology : Electrical & electronics engineering
	To cite this reference:	http://hdl.handle.net/10993/7595

Title :	A multiuser downlink system combining limited feedback and channel correlaton information
Language :	English
Author, co-author :	Huang, Yongming [> >]
	Yang, Luxi [> >]
	Bengtsson, Mats [> >]
	Ottersten, Björn [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Publication date :	2010
Main document title :	Communications (ICC), 2010 IEEE International Conference on
Publisher :	IEEE
Pages :	1-5
Peer reviewed :	Yes
Audience :	International
ISBN :	978-1-4244-6402-9
Event name :	Communications (ICC), 2010 IEEE International Conference on
Event date :	23-27 May 2010
Event place (city) :	Cape Town
Event country :	South Africa
Abstract :	[en] We address the problem of combining limited feedback information with long-term channel statistical information in the design of downlink SDMA schemes. A novel combining method is developed to improve the quality of channel knowledge at the base station. More specifically, a set of novel feedback parameters is proposed and a related method is developed to estimate a representation of the multiuser channel vectors at the base station. This method utilizes the hybrid information by combining instantaneous channel feedback and long-term channel statistics, and is based on a channel phase codebook designed using the generalized Lloyd algorithm. The estimated channel knowledge at the base station can be used for joint design of multiuser precoding and opportunistic scheduling. The advantage of the proposed scheme over existing CSI quantization based SDMA schemes is further confirmed by computer simulations.
Target :	Others
Permalink :	http://hdl.handle.net/10993/7595
DOI :	10.1109/ICC.2010.5502116

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