Diversity-multiplexing tradeoff in multiple-access channels
Tse, D.N.C.
Viswanath, P.
Lizhong Zheng
Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Berkeley, CA, USA;
This paper appears in: Information Theory, IEEE Transactions on
Publication Date: Sept. 2004
Volume: 50,
Issue: 9
On page(s): 1859- 1874
ISSN: 0018-9448
INSPEC Accession Number: 8091173
Digital Object Identifier: 10.1109/TIT.2004.833347
Current Version Published: 2004-08-30
Abstract
In a point-to-point wireless fading channel, multiple transmit and receive antennas can be used to improve the reliability of reception (diversity gain) or increase the rate of communication for a fixed reliability level (multiplexing gain). In a multiple-access situation, multiple receive antennas can also be used to spatially separate signals from different users (multiple-access gain). Recent work has characterized the fundamental tradeoff between diversity and multiplexing gains in the point-to-point scenario. In this paper, we extend the results to a multiple-access fading channel. Our results characterize the fundamental tradeoff between the three types of gain and provide insights on the capabilities of multiple antennas in a network context.
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