DocumentCode :
2139248
Title :
Joint wireless information and power transfer in a three-node autonomous MIMO relay network
Author :
Huang, Yang ; Clerckx, Bruno
Author_Institution :
Department of Electrical and Electronic Engineering, Imperial College London, SW7 2AZ, United Kingdom
fYear :
2015
fDate :
8-12 June 2015
Firstpage :
1999
Lastpage :
2004
Abstract :
This paper investigates a three-node amplify-and-forward (AF) multiple-input multiple-output (MIMO) relay network, where an autonomous relay harvests power from the source information flow and is further helped by an energy flow in the form of a wireless power transfer (WPT) at the destination. An energy-flow-assisted two-phase relaying scheme is proposed, where a source and relay joint optimization is formulated to maximize the rate. By diagonalizing the channel, the problem is simplified to a power optimization, where a relay channel pairing problem is solved by an ordering operation. The proposed algorithm, which iteratively optimizes the relay and source power, is shown to converge. Closed-form solutions can be obtained for the separate relay and source optimizations. Besides, a two-phase relaying without energy flow is also studied. Simulation results show that the energy-flow-assisted scheme is beneficial to the rate enhancement, if the transmit power of the energy flow is adequately larger than that of the information flow. Otherwise, the scheme without energy flow would be preferable.
Keywords :
Joints; MIMO; Optimization; Receivers; Relay networks (telecommunications); Wireless communication; Energy harvesting; amplify-and-forward (AF); multiple-input multiple-output (MIMO); relay network;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2015 IEEE International Conference on
Conference_Location :
London, United Kingdom
Type :
conf
DOI :
10.1109/ICC.2015.7248619
Filename :
7248619
Link To Document :
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