Title :
Resource allocation in AF-OFDMA two-way relay systems
Author :
Qingtao Wan ; Guanyi Ma
Author_Institution :
Nat. Astron. Obs., Beijing, China
Abstract :
A resource allocation problem is considered 1 in amplify-and-forward (AF) based multirelay and multiuser two-way relay systems under orthogonal frequency division multiple access (OFDMA) modulation. In order to maximize the system data rate, a joint relay selection and power allocation algorithm is proposed with total power constraint. An equivalent channel power gain is proposed to simplify the system model. The relay node and users, which has the maximal value of equivalent channel power gains, are used to transmit signals for every subchannel. The water-filling method is used to power allocation among subchannels. Simulation results show that the system performance is improved with the proposed algorithm.
Keywords :
OFDM modulation; amplify and forward communication; frequency division multiple access; relay networks (telecommunication); resource allocation; AF-OFDMA two-way relay systems; amplify-and-forward based multirelay two-way relay systems; amplify-and-forward based multiuser two-way relay systems; orthogonal frequency division multiple access modulation; power allocation algorithm; relay node; relay selection; resource allocation; water-filling method; Joints; OFDM; Relay networks (telecommunications); Resource management; Signal to noise ratio; Simulation; OFDMA; Two-way relay; amplify-and-forward; equivalent channel power gain; water-filling method;
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
DOI :
10.1109/URSIGASS.2014.6929282
