On the outage capacity of the block fading channel at low-power regime
Type
Conference PaperAuthors
Rezki, Zouheir
Alouini, Mohamed-Slim

KAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
Communication Theory Lab
Date
2014-06Permanent link to this record
http://hdl.handle.net/10754/564931
Metadata
Show full item recordAbstract
Outage performance of the M-block fading with additive white Gaussian noise (BF-AWGN) is investigated at low-power regime. We consider delay-constrained constant-rate communications with perfect channel state information (CSI) at both the transmitter and the receiver (CSI-TR), under a short-term power constraint. We show that selection diversity that allocates all the power to the strongest block is asymptotically optimal. Then, we provide a simple characterization of the outage probability in the regime of interest. We quantify the reward due to CSI-TR over the constant-rate constant-power scheme and show that this reward increases with the delay constraint. For instance, for Rayleigh fading, we find that a power gain up to 4.3 dB is achievable. © 2014 IEEE.Conference/Event name
2014 IEEE International Symposium on Information Theory, ISIT 2014ISBN
9781479951864ISSN
21578095ae974a485f413a2113503eed53cd6c53
10.1109/ISIT.2014.6875363