NDLI: Analysis of Energy Efficiency in Fading Channels under QoS Constraints

Content Provider	IEEE Xplore Digital Library
Author	Deli Qiao Gursoy, M.C. Velipasalar, S.
Copyright Year	2008
Description	Author affiliation: Dept. of Electr. Eng., Univ. of Nebraska-Lincoln, Lincoln, NE (Deli Qiao; Gursoy, M.C.; Velipasalar, S.)
Abstract	Energy efficiency in fading channels in the presence of QoS constraints is studied. Effective capacity, which provides the maximum constant arrival rate that a given process can support while satisfying statistical delay constraints, is considered. Spectral efficiency-bit energy tradeoff is analyzed in the low-power and wideband regimes by employing the effective capacity formulation, rather than the Shannon capacity, and energy requirements under QoS constraints are identified. The analysis is conducted for the case in which perfect channel side information (CSI) is available at the receiver and also for the case in which perfect CSI is available at both the receiver and transmitter. In particular, it is shown in the low-power regime that the minimum bit energy required in the presence of QoS constraints is the same as that attained when there are no such limitations. However, this performance is achieved as the transmitted power vanishes. Through the wideband slope analysis, the increased energy requirements at low but nonzero power levels are determined. A similar analysis is also conducted in the wideband regime, and minimum bit energy and wideband slope expressions are obtained. In this regime, the required bit energy levels are found to be strictly greater than those achieved when Shannon capacity is considered. Overall, an energy-delay tradeoff is characterized.
Starting Page	1
Ending Page	5
File Size	213337
Page Count	5
File Format	PDF
ISBN	9781424423248
ISSN	1930529X
DOI	10.1109/GLOCOM.2008.ECP.201
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-11-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Energy efficiency Fading Quality of service Wideband Delay effects Information analysis Energy states Mobile communication Multimedia communication Throughput
Content Type	Text
Resource Type	Article

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