Paper Info
Title
Linear Precoding in the Downlink of Limited Feedback Multiuser MIMO Systems
Abstract
The downlink of a multiuser multiple-input multiple-output system is considered. Compared to nonlinear precoding strategies which are designed to achieve the channel capacity in case of perfect channel state information (CSI) at the transmitter, we focus on systems which are restricted to use only linear precoders due to complexity constraints and where only partial CSI is available at the transmitter due to limited feedback. Here, we compare two different feedback approaches: in the first, users feed back the best entry of a precoder codebook, and in the second, users provide quantized channel information based on a channel codebook. The presented transmitters exploit the available feedback information to select the users for transmission (scheduling) and to compute the corresponding precoder. Sum rate investigations show that channel codebook based feedback should be preferred in systems with a very low feedback rate.
Year
DOI
Venue
2007
10.1109/GLOCOM.2007.829
GLOBECOM
Keywords
Field
DocType
MIMO communication,channel capacity,channel coding,linear codes,multiuser channels,precoding,channel capacity,channel codebook,channel state information,feedback multiuser MIMO system,linear precoding,multiple-input multiple-output system,perfect CSI
Multi-user MIMO,Computer science,Control theory,MIMO,Communication channel,Zero-forcing precoding,Channel capacity,Precoding,Codebook,Channel state information
Conference
ISSN
Citations 
PageRank 
1930-529X
13
0.75
References 
Authors
10
2
Name
Order
Citations
PageRank
Guido Dietl112715.21
Gerhard Bauch261177.45