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conference paper
The pre-log of Gaussian broadcast with feedback can be two
2008
2008 Ieee International Symposium On Information Theory Proceedings, Vols 1-6
A generic intuition says that the pre-log, or multiplexing gain, cannot be larger than the minimum of the number of transmit and receive dimensions. This suggests that for the scalar broadcast channel, the pre-log cannot exceed one. By contrast, in this note, we show that when the noises are anticorrelated and feedback is present, then a pre-log of two can be attained. In other words, in this special case, in the limit of high SNR, the scalar Gaussian broadcast channel turns into two parallel AWGN channels. Achievability is established via a coding strategy due to Schalkwijk, Kailath, and Ozarow.
Use this identifier to reference this record
Type
conference paper
Web of Science ID
WOS:000260364400254
Authors
Publication date
2008
Published in
2008 Ieee International Symposium On Information Theory Proceedings, Vols 1-6
ISBN of the book
978-1-4244-2256-2
Start page
1258
End page
1262
Peer reviewed
REVIEWED
EPFL units
Event name | Event place | Event date |
Toronto, CANADA | Jul 06-11, 2008 | |
Available on Infoscience
October 17, 2011