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Browse Journals & Magazines > Wireless Communications, IEEE ...> Volume:9 Issue:3 Help

Capacity of MIMO-MAC with transmit channel knowledge in the low SNR regime

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5 Author(s)
Xiao Li ; Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China ; Shi Jin ; McKay, M.R. ; Xiqi Gao
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We study the sum capacity of the uplink multiuser multiple-input multiple-output (MIMO) multiple-access channel (MAC) in the low signal-to-noise ratio (SNR) regime under double-scattering and Rician fading scenarios. The receiver is assumed to have perfect channel state information (CSI), while each transmitter knows only its statistical CSI. We first derive analytical expressions for the minimum ¿b/N0 and the wideband slope of MIMO systems employing statistical beamforming, based on which we then present new analytical approximations for the sum capacity of the MIMO-MAC at low SNRs, and investigate the effects of transmit, receive and scatterer correlation, as well as Rician K-factor.

Published in:
Wireless Communications, IEEE Transactions on  (Volume:9 ,  Issue: 3 )

Date of Publication: March 2010

Page(s):
926 - 931
ISSN :
1536-1276
INSPEC Accession Number:
11171578
Digital Object Identifier :
10.1109/TWC.2010.03.090266
Date of Current Version :
11 March 2010
Issue Date :
March 2010
Sponsored by :
IEEE Communications Society

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