Title :
An Efficient Multiuser Relaying Scheme for OFDMA Systems
Author :
Hara, Yoshitaka ; Kubo, Hiroshi
Author_Institution :
Mitsubishi Electr. Corp., Kamakura
Abstract :
This paper proposes an efficient multiuser relaying scheme in OFDMA systems. In the proposed scheme, multiple terminals transmit packets simultaneously in the same subband and multiple relay stations retransmit their received signals in different subbands after subband conversion. The base station (BS) extracts each packet from multi-dimensional signals received at the different subbands. In advance of data transmission, the BS´s scheduler selects appropriate terminals for packet transmission such that the BS can detect each packet correctly. Numerical results show that the proposed relaying scheme achieves much higher system throughput than the conventional relaying scheme.
Keywords :
OFDM modulation; multiuser detection; packet radio networks; OFDMA systems; multiple relay stations; multiuser relaying scheme; packet transmission; received signals; Acoustic noise; Base stations; Data communication; Data mining; Digital relays; Power system relaying; Repeaters; Scheduling; Throughput; Zirconium;
Conference_Titel :
Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-2517-4
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2009.5073380