NDLI: Randomized Space-Time Coding for Distributed Cooperative Communication

Content Provider	IEEE Xplore Digital Library
Author	Mergen, B.S. Scaglione, A.
Copyright Year	2006
Description	Author affiliation: School of ECE, Cornell University, 432 Rhodes Hall, Ithaca, NY 14853. Email: bs233@cornell.edu (Mergen, B.S.) \|\| School of ECE, Cornell University, 325 Rhodes Hall, Ithaca, NY 14853. Email: anna@ece.cornell.edu (Scaglione, A.)
Abstract	In this paper, we study the problem of designing distributed space-time codes for cooperative communication. We introduce randomized strategies that decentralize the transmission of a space time code from a set of distributed relays and analyze their performance. In our methods, as in other cooperative transmission strategies, the relay signals are encoded so as to provide diversity and coding gains. However, our methods enable the relays to act independently and to achieve such gains in a decentralized fashion. The simple idea we propose is to let each node transmit a random linear combination of the codewords that would be transmitted by all the antennas in a centralized space time coding scheme. Different decentralized strategies correspond to different choices for the statistics of the random coefficients. We provide sufficient conditions on the distributions of the random coefficients and on the number of nodes that guarantee to achieve the maximum diversity gain. We show that the proposed scheme achieves full diversity (N) if N < L, where N is the number of transmitters and L is the number of antennas in the underlying space-time code. The diversity order L is achieved for N > L.
Starting Page	4501
Ending Page	4506
File Size	183193
Page Count	6
File Format	PDF
ISBN	1424403553
ISSN	81649547
DOI	10.1109/ICC.2006.255348
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-11
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Space time codes Relays Performance analysis Sufficient conditions Transmitters Transmitting antennas Large-scale systems Wireless networks Protocols Decoding
Content Type	Text
Resource Type	Article

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