Power allocation for discrete-input non-ergodic block-fading channels
2007 (English)In: 2007 IEEE INFORMATION THEORY WORKSHOP, VOLS 1 AND 2, 2007, 48-53 p.Conference paper (Other academic)
We consider power allocation algorithms for fixed-rate transmission over Nakagami-m non-ergodic block-fading channels with perfect transmitter and receiver channel state information and discrete input signal constellations under short-and long-term power constraints. Optimal power allocation schemes are shown to be direct applications of previous results in the literature. We show that the SNR exponent of the optimal short-term scheme is given by the Singleton bound. We also illustrate the significant gains available by employing long-term power constraints. Due to the nature of the expressions involved, the complexity of optimal schemes may be prohibitive for system implementation. We propose simple sub-optimal power allocation schemes whose outage probability performance is very close to the minimum outage probability obtained by optimal schemes.
Place, publisher, year, edition, pages
2007. 48-53 p.
IdentifiersURN: urn:nbn:se:kth:diva-62625DOI: 10.1109/ITW.2007.4313048ISI: 000253441300009OAI: oai:DiVA.org:kth-62625DiVA: diva2:480787
IEEE Information Theory Workshop. Tahoe City, CA. SEP 02-06, 2007
QC 201203072012-01-192012-01-192012-03-07Bibliographically approved