NDLI: Cooperative space-time codes with opportunistic network coding with increasing numbers of nodes

Content Provider	IEEE Xplore Digital Library
Author	Menghwar, G.D. Shah, A.A. Mecklenbrauker, C.F.
Copyright Year	2009
Description	Author affiliation: Institute of Broadband Communications, Vienna University of Technology, Vienna, Austria (Shah, A.A.) \|\| Institute of Communications and Radio Frequency Engineering, Vienna University of Technology, Vienna, Austria (Menghwar, G.D.; Mecklenbrauker, C.F.)
Abstract	The benefits of diversity offered by Multiple-Input-Multiple-Output (MIMO) can only be achieved with the concept of cooperative communications in nodes having single antenna. Cooperative communications is a way of communications where users, besides transmitting their own information, also transmit re-encoded version of other users' information to a common destination. We extend our study of cooperative communications with opportunistic network coding to more than one idle/free user acting as a relay for two space-time cooperating users. In our study we have taken two cooperating users using space-time (ST) codes, and multiple other free users in their vicinity. These users are free in the sense that they are not demanding the service at the time of transmission from cooperative users. These free users receive in one phase from cooperating users, and send network coded bits from cooperating users to destination in the next phase. We have taken two scenarios to discuss the potential benefits of the scheme. In the first scenario, each free node, added one after the other to the network, is taken to be at the same distance from transmitting users. In the second scenario, every other node added to the network is placed a distance farther from the previous one. The results show that the investigated scheme outperforms, for a range of SNR with fixed number of nodes, user cooperation using ST codes only.
Starting Page	536
Ending Page	539
File Size	186273
Page Count	4
File Format	PDF
ISBN	9781424435845
DOI	10.1109/ISWCS.2009.5285254
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-07
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio frequency Space technology Decision making Space time codes Network coding Diversity methods MIMO Broadband communication Broadband antennas Relays
Content Type	Text
Resource Type	Article

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