DocumentCode :
2771627
Title :
Multiuser Cooperative Relay Communication Employing Hierarchical Modulation
Author :
Whang, Roderick Jaehoon ; Liu, Huaping ; Hong, Een-Kee
Author_Institution :
Sch. of EECS, Oregon State Univ., Corvallis, OR, USA
fYear :
2010
fDate :
16-19 May 2010
Firstpage :
1
Lastpage :
5
Abstract :
We develop a scheme to improve data throughput for multiuser cooperative relay communications operating in half-duplex mode. Cooperative relay, while effective in mitigating fading effects, might reduce the overall throughput of the network since it requires additionally resources for relay. In order to overcome this limitation, we develop a multiuser cooperative communication scheme that employs hierarchical modulation. This scheme exploits the different fading conditions for each user and allows the system to transmit two independent data streams simultaneously. Since the bit-error rate of the proposed system is a function of the distance parameters of hierarchical modulation, transmission reliability can be controlled flexibly by varying the distance parameter. We derive the error-rate expressions of the proposed scheme and compare its symbol-error rate performance for specific distance parameters with that of conventional relay schemes.
Keywords :
error statistics; modulation; radiocommunication; telecommunication network reliability; bit-error rate expression; data throughput; fading effect mitigation; half-duplex mode; hierarchical modulation; multiuser cooperative relay communication; symbol-error rate; transmission reliability; wireless communications; Base stations; Fading; Mobile communication; Modulation coding; Phase modulation; Protection; Protective relaying; Relays; Throughput; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference (VTC 2010-Spring), 2010 IEEE 71st
Conference_Location :
Taipei
ISSN :
1550-2252
Print_ISBN :
978-1-4244-2518-1
Electronic_ISBN :
1550-2252
Type :
conf
DOI :
10.1109/VETECS.2010.5493864
Filename :
5493864
Link To Document :
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