Back to Search
Start Over
Energy-Efficient Power Allocation in Non-Linear Energy Harvesting Multiple Relay Systems
- Source :
- Algorithms, Volume 14, Issue 5, Algorithms, Vol 14, Iss 155, p 155 (2021)
- Publication Year :
- 2021
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2021.
-
Abstract
- In this paper, to maximize the energy efficiency (EE) in the two-hop multi-relay cooperative decoding and forwarding (DF) system for simultaneous wireless information and power transmission (SWIPT), an optimal power allocation algorithm is proposed, in which the relay energy harvesting (EH) adopts a nonlinear model. Under the constraints, including energy causality, the minimum transmission quality of information and the total transmission power at the relays, an optimization problem is constructed to jointly optimize the transmit power and power-splitting (PS) ratios of multiple relays. Although this problem is a nonlinear fractional programming problem, an iterative algorithm is developed to obtain the optimal power allocation. In particular, the joint power allocation at multiple relays is first decoupled into a single relay power allocation, and then single-relay power allocation is performed by the Dinkelbach iteration algorithm, which can be proven that it is a convex programming problem. Its closed form solutions for different polylines of EH models are obtained by using mathematical methods, such as monotonicity, Lagrange multipliers, the KKT condition and the Cardan formula. The simulation results show the superiority of the power allocation algorithm proposed in this paper in terms of EE.
- Subjects :
- Mathematical optimization
Karush–Kuhn–Tucker conditions
Optimization problem
Industrial engineering. Management engineering
Computer science
02 engineering and technology
Data_CODINGANDINFORMATIONTHEORY
T55.4-60.8
Theoretical Computer Science
law.invention
Fractional programming
0203 mechanical engineering
Relay
law
0202 electrical engineering, electronic engineering, information engineering
energy efficiency
Computer Science::Information Theory
Numerical Analysis
Power transmission
SWIPT
multi-relay
020206 networking & telecommunications
020302 automobile design & engineering
QA75.5-76.95
Transmitter power output
power allocation
Computational Mathematics
Computational Theory and Mathematics
Electronic computers. Computer science
Convex optimization
nonlinear EH
Efficient energy use
Subjects
Details
- Language :
- English
- ISSN :
- 19994893
- Database :
- OpenAIRE
- Journal :
- Algorithms
- Accession number :
- edsair.doi.dedup.....ef7747d93f695cfebf2c349d220d552b
- Full Text :
- https://doi.org/10.3390/a14050155