DocumentCode :
2133586
Title :
Cellular vs. Network MIMO: A comparison including the channel state information overhead
Author :
Ramprashad, Sean A. ; Caire, Giuseppe
Author_Institution :
DoCoMo Commun. Labs. USA, Inc., Palo Alto, CA, USA
fYear :
2009
fDate :
13-16 Sept. 2009
Firstpage :
878
Lastpage :
884
Abstract :
Cooperative base-station (BS) signaling using MU-MIMO (Network MIMO) has received a great deal of attention given its ability to reduce inter-cell interference (ICI) and improve the system spectral efficiency. Indeed for a given number of antennas per BS, cooperative systems can have significant benefits over conventional cellular architectures. However cooperative signaling requires and uses more channel state information (CSI). This increases CSI signaling overhead, and can have a non-negligible effect on the system throughput. In fact once systems are compared while taking into account CSI overhead, the question of what system architecture is best becomes interesting and non-trivial. We provide one such alternative look at cooperative architectures. We show, despite prevailing views, that cellular architectures, using coordinated colocated antennas, can be quite attractive compared to Network MIMO.
Keywords :
MIMO communication; cellular radio; channel allocation; interference suppression; CSI overhead; MU-MIMO; cellular architecture; channel state information overhead; cooperative base-station signaling; coordinated colocated antenna; intercell interference; network MIMO; system spectral efficiency; Channel state information; Cooperative systems; Costs; Downlink; Hardware; Interference; MIMO; Physical layer; Protocols; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5122-7
Electronic_ISBN :
978-1-4244-5123-4
Type :
conf
DOI :
10.1109/PIMRC.2009.5450085
Filename :
5450085
Link To Document :
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