DocumentCode
1014332
Title
On the capacity of the vector MAC with feedback
Author
Jafar, Syed ; Goldsmith, Andrea
Author_Institution
California Univ., Irvine, CA, USA
Volume
52
Issue
7
fYear
2006
fDate
7/1/2006 12:00:00 AM
Firstpage
3259
Lastpage
3264
Abstract
In this correspondence, we determine the feedback capacity region of a two user Gaussian multiple-access channel (MAC) with multiple antennas at the base station and a single antenna at each user. The vector MAC with a single antenna at the base station and multiple antennas at each user is shown to be equivalent to a scalar MAC. We also determine the capacity enhancement due to feedback at high signal-to-noise ratio (SNR) for the scalar and vector MAC for any number of users. Extensions of the high SNR results to the vector broadcast channel are also provided.
Keywords
Gaussian channels; antenna arrays; broadcast channels; channel capacity; feedback; multiuser channels; wireless channels; Gaussian multiple-access channel; broadcast channel; feedback capacity region; multiple antennas; vector MAC; Antenna feeds; Base stations; Channel capacity; Channel state information; Mobile antennas; Receiving antennas; Signal to noise ratio; State feedback; Transmitters; Transmitting antennas; Broadcast; capacity; feedback; multiple access; multiple antennas;
fLanguage
English
Journal_Title
Information Theory, IEEE Transactions on
Publisher
ieee
ISSN
0018-9448
Type
jour
DOI
10.1109/TIT.2006.876230
Filename
1650368
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