Efficient user Scheduling under Low Rate Feedback for Correlated MIMO Broadcast Channels
Wei Xu
Chunming Zhao
Zhi Ding
Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing;
This paper appears in: Communications, 2008. ICC '08. IEEE International Conference on
Publication Date: 19-23 May 2008
On page(s): 3658-3663
Location: Beijing,
ISBN: 978-1-4244-2075-9
INSPEC Accession Number: 10041746
Digital Object Identifier: 10.1109/ICC.2008.688
Current Version Published: 2008-05-30
Abstract
This paper investigates the scheduling of user signals in MIMO systems with spatially correlated channels. By maximizing an upper bound of the sum capacity, we propose a scheduling scheme which requires only a single scalar feedback from each receiving user. To further reduce the need for user information feedback and better explore the spatial correlation information, a more efficient scheduling method is also developed. This new approach only requires a 1-bit indicator from each user and selects users according to the slowly varying MIMO channel correlation information. Numerical results verify the effectiveness of our proposed schemes.
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