Finite-SNR Bounds on the Sum-Rate Capacity of Rayleigh Block-Fading Multiple-Access Channels with no a Priori CSI
Artikel i vetenskaplig tidskrift, 2015
We provide nonasymptotic upper and lower bounds on the sum-rate capacity of Rayleigh block-fading multiple-access channels for the set up where a priori channel state information is not available. The upper bound relies on a dual formula for chan- nel capacity and on the assumption that the users can cooperate perfectly. The lower bound is derived assuming a noncooperative scenario where each user employs unitary space-time modulation (independently from the other users). Numerical results show that the gap between the upper and the lower bound is small already at moderate SNR values. This suggests that the sum-rate capac- ity gains obtainable through user cooperation are minimal for the scenarios considered in the paper.
Channel capacity
multiuser channels
time-varying channels
channel state information
Författare
Rahul Devassy
Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk
Giuseppe Durisi
Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk
Johan Östman
Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk
Wei Yang
Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk
Tome Eftimov
Macedonian Academy of Sciences and Arts
Zoran Utkovski
Macedonian Academy of Sciences and Arts
Goce Delchev University - Stip
IEEE Transactions on Communications
0090-6778 (ISSN) 15580857 (eISSN)
Vol. 63 10 3621-3632 07185371Styrkeområden
Informations- och kommunikationsteknik
Ämneskategorier
Kommunikationssystem
DOI
10.1109/TCOMM.2015.2466536