Please use this identifier to cite or link to this item:
Title: Throughput maximization for the gaussian relay channel with energy harvesting constraints
Authors: Huang, C.
Zhang, R. 
Cui, S.
Keywords: Cooperative communication
Decode and forward (DF)
Energy diversity
Energy harvesting
Relay channel
Issue Date: 2013
Citation: Huang, C., Zhang, R., Cui, S. (2013). Throughput maximization for the gaussian relay channel with energy harvesting constraints. IEEE Journal on Selected Areas in Communications 31 (8) : 1469-1479. ScholarBank@NUS Repository.
Abstract: This paper considers the use of energy harvesters, instead of conventional time-invariant energy sources, in wireless cooperative communication. For the purpose of exposition, we study the classic three-node Gaussian relay channel with decode-and-forward (DF) relaying, in which the source and relay nodes transmit with power drawn from energy-harvesting (EH) sources. Assuming a deterministic EH model under which the energy arrival time and the harvested amount are known prior to transmission, the throughput maximization problem over a finite horizon of N transmission blocks is investigated. In particular, two types of data traffic with different delay constraints are considered: delay-constrained (DC) traffic (for which only one-block decoding delay is allowed at the destination) and no-delay-constrained (NDC) traffic (for which arbitrary decoding delay up to N blocks is allowed). For the DC case, we show that the joint source and relay power allocation over time is necessary to achieve the maximum throughput, and propose an efficient algorithm to compute the optimal power profiles. For the NDC case, although the throughput maximization problem is non-convex, we prove the optimality of a separation principle for the source and relay power allocation problems, based upon which a two-stage power allocation algorithm is developed to obtain the optimal source and relay power profiles separately. Furthermore, we compare the DC and NDC cases, and obtain the sufficient and necessary conditions under which the NDC case performs strictly better than the DC case. It is shown that NDC transmission is able to exploit a new form of diversity arising from the independent source and relay energy availability over time in cooperative communication, termed «energy diversity», even with time-invariant channels. © 2013 IEEE.
Source Title: IEEE Journal on Selected Areas in Communications
ISSN: 07338716
DOI: 10.1109/JSAC.2013.130811
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Apr 15, 2021


checked on Apr 15, 2021

Page view(s)

checked on Apr 13, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.