NDLI: Energy-efficient uplink training design for closed-loop MISO systems

Content Provider	IEEE Xplore Digital Library
Author	Xin Liu Shengqian Han Chenyang Yang Chengjun Sun
Copyright Year	2013
Description	Author affiliation: Beihang Univ., Beijing, China (Xin Liu; Shengqian Han; Chenyang Yang) \|\| Beijing Samsung Telecom R&D Center, Beijing, China (Chengjun Sun)
Abstract	When the circuit power consumption and the overhead for channel estimation are taken into account, the system designed for maximizing the spectrum efficiency (SE) does not necessarily yield high energy efficiency (EE). In this paper, we strive to optimize the uplink training length towards maximizing the EE of closed-loop multi-antenna systems under the constraint of the SE. The upper bounds of the system EE and the net downlink SE with channel estimation errors are derived, based on which the optimization problem is proved as convex, and the impacts of signal-to-noise ratio (SNR) and circuit power consumption on the optimal training length are analyzed. Analytical and simulation results show that in general the EE-oriented optimization leads to a longer training length than the SE-oriented optimization, and it will reduce to the SE-oriented optimization at high SNR and very low SNR regime, or with very high circuit power consumption.
Sponsorship	IEEE Commun. Soc.
Starting Page	2548
Ending Page	2553
File Size	411356
Page Count	6
File Format	PDF
ISBN	9781467359382
ISSN	15253511
e-ISBN	9781467359399
e-ISBN	9781467359375
DOI	10.1109/WCNC.2013.6554962
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-04-07
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Training Optimization Uplink Signal to noise ratio Power demand Downlink Channel estimation
Content Type	Text
Resource Type	Article

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