DocumentCode :
879486
Title :
High performance cooperative transmission protocols based on multiuser detection and network coding
Author :
Han, Zhu ; Zhang, Xin ; Poor, H. Vincent
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Houston, Houston, TX, USA
Volume :
8
Issue :
5
fYear :
2009
fDate :
5/1/2009 12:00:00 AM
Firstpage :
2352
Lastpage :
2361
Abstract :
Cooperative transmission is an emerging communication technique that takes advantage of the broadcast nature of wireless channels. However, due to low spectral efficiency and the requirement of orthogonal channels, its potential for use in future wireless networks is limited. In this paper, by making use of multiuser detection (MUD) and network coding, cooperative transmission protocols with high spectral efficiency, diversity order, and coding gain are developed. Compared with the traditional cooperative transmission protocols with singleuser detection, in which the diversity gain is only for one source user, the proposed MUD cooperative transmission protocols have the merit that the improvement of one user´s link can also benefit the other users. In addition, using MUD at the relay provides an environment in which network coding can be employed. The coding gain and high diversity order can be obtained by fully utilizing the link between the relay and the destination. From the analysis and simulation results, it is seen that the proposed protocols achieve higher diversity gain, better asymptotic efficiency, and lower bit error rate, compared to traditional MUD schemes and to existing cooperative transmission protocols. From the simulation results, the performance of the proposed scheme is near optimal as the performance gap is 0.12dB for average bit error rate (BER) 10-6 and 1.04dB for average BER 10-3, compared to two performance upper bounds.
Keywords :
channel coding; diversity reception; multiuser detection; protocols; radio networks; wireless channels; asymptotic efficiency; bit error rate; coding gain; diversity order; high performance cooperative transmission protocols; multiuser detection; network coding; orthogonal channels; singleuser detection; wireless channels; wireless networks; Analytical models; Bit error rate; Broadcasting; Diversity methods; Multiuser detection; Network coding; Protocols; Relays; Upper bound; Wireless networks; Detection; coding; communication networks; cooperative systems;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2009.070181
Filename :
4927450
Link To Document :
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