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Channel estimation and user selection in the MIMO broadcast channel

DSpace at IIT Bombay

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Title Channel estimation and user selection in the MIMO broadcast channel
 
Creator DAVIS, LM
HANLY, SV
TUNE, P
BHASKARAN, SR
 
Subject OPPORTUNISTIC FEEDBACK
PERFORMANCE ANALYSIS
LIMITED FEEDBACK
SYSTEMS
DIVERSITY
LASSO
Sparse signal recovery
Compressed sensing
Broadcast channel
MIMO
User selection
Channel estimation
 
Description In this paper, we propose a method for user selection and channel estimation for the multiple-input multiple-output (MIMO) broadcast channel for the downlink of a cellular mobile or local-area wireless communication system. A distributed self-selection procedure is combined with a code-division multiple access (CDMA) uplink signaling strategy to reduce the uplink signaling bandwidth, and the computational complexity of user selection at the base station. We exploit recent advances in sparse signal recovery, which we apply to the uplink multi-user detection and channel estimation problems to reduce the signaling bandwidth. We establish that full channel state information (and not just channel quality) for each self-selecting user can be obtained at the base station via a compressed-sensing technique with no increase in overhead for the uplink feedback channel. We demonstrate the new method as a medium access technique for MIMO downlink broadcast with transmitter precoding and linear receiver processing. (C) 2011 Elsevier Inc. All rights reserved.
 
Publisher ACADEMIC PRESS INC ELSEVIER SCIENCE
 
Date 2012-06-26T06:37:22Z
2012-06-26T06:37:22Z
2011
 
Type Article
 
Identifier DIGITAL SIGNAL PROCESSING,21(5)608-618
1051-2004
http://dx.doi.org/10.1016/j.dsp.2011.01.003
http://dspace.library.iitb.ac.in/jspui/handle/100/14055
 
Language English