Practical investigation of performance trade-offs in cooperative-relaying wireless networks
Proceedings of the 6th ACM symposium on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks
On the study of network coded AF transmission protocol for wireless multiple access channels
IEEE Transactions on Wireless Communications
On the study of network coding with diversity
IEEE Transactions on Wireless Communications
Application of joint source-relay scheduling to cooperative multiple access channels
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 2
Iterative decoding for superposition modulation-based cooperative transmission
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 1
Channel Access Scheme for MIMO-Enabled Ad Hoc Networks with Adaptive Diversity/Multiplexing Gains
Mobile Networks and Applications
ICICS'09 Proceedings of the 7th international conference on Information, communications and signal processing
Performance of iterative decoding for superposition modulation-based cooperative transmission
IEEE Transactions on Wireless Communications
A relay assisted cooperative transmission protocol for wireless multiple access systems
IEEE Transactions on Communications
Cooperative transmission protocols for wireless broadcast channels
IEEE Transactions on Wireless Communications
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A spectrally efficient strategy is proposed for cooperative multiple access (CMA) channels in a centralized communication environment with N users. By applying superposition coding, each user will transmit a mixture containing its own information as well as the other users', which means that each user shares parts of its power with the others. The use of superposition coding in cooperative networks was first proposed in [E. G. Larsson and B. R. Vojcic, Cooperative transmit diversity based on superposition modulation, IEEE Commun. Lett., vol. 9, pp. 778 780, Sep. 2005. ] , which will be generalized to a multiple-user scenario in this paper. Since the proposed CMA system can be seen as a precoded point-to-point multiple-antenna system, its performance can be best evaluated using the diversity-multiplexing tradeoff. By carefully categorizing the outage events, the diversity-multiplexing tradeoff can be obtained, which shows that the proposed cooperative strategy can achieve larger diversity/multiplexing gain than the compared transmission schemes at any diversity/multiplexing gain. Furthermore, it is demonstrated that the proposed strategy can achieve optimal tradeoff for multiplexing gains 0 les tau les1 whereas the compared cooperative scheme is only optimal for 0 les tau les (1/N) . As discussed in the paper, such superiority of the proposed CMA system is due to the fact that the relaying transmission does not consume extra channel use and, hence, the deteriorating effect of cooperative communication on the data rate is effectively limited.