DocumentCode :
1329631
Title :
Outage-Efficient Strategies for Multiuser MIMO Networks With Channel Distribution Information
Author :
Ghosh, Sagnik ; Rao, Bhaskar D. ; Zeidler, James R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of California, San Diego, La Jolla, CA, USA
Volume :
58
Issue :
12
fYear :
2010
Firstpage :
6312
Lastpage :
6324
Abstract :
In this paper, we examine single user and multiuser multiple-input multiple-output (MIMO) beamforming networks with channel distribution information (CDI). Since CDI changes infrequently compared to channel state information (CSI), algorithms based on CDI can achieve significant savings in feedback compared to algorithms based on CSI. With CDI, we can only guarantee quality of service for a specified outage probability in the network. Assuming correlated Rayleigh fading on all the links, we derive a closed-form expression for the outage probability. Then, using this expression, we derive algorithms for joint transmit/receive beamforming and power control to minimize the weighted sum power in the network while guaranteeing these outage probabilities. For both single-user and multiuser MIMO scenarios, we present optimal algorithms under the Kronecker model assumption, and we present near-optimal algorithms assuming general correlation structures on the links. We then show that using these algorithms based on CDI, if we are willing to accept given outages on the links, we can achieve comparable power usage in the network relative to algorithms based on CSI.
Keywords :
MIMO communication; Rayleigh channels; array signal processing; multiuser channels; probability; quality of service; CDI; CSI; MIMO; Rayleigh fading; channel distribution information; channel state information; multiple input multiple output; multiuser beamforming networks; outage probability; power control; quality of service; Array signal processing; Interference; MIMO; Optimization; Random variables; Rayleigh channels; Signal to noise ratio; Beamformers; channel distribution information (CDI); channel state information (CSI); covariance feedback; multi user MIMO; outage probability;
fLanguage :
English
Journal_Title :
Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
1053-587X
Type :
jour
DOI :
10.1109/TSP.2010.2077285
Filename :
5580109
Link To Document :
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