Differential distributed space-time block coding

TitleDifferential distributed space-time block coding
Publication TypeConference Paper
Year of Publication2005
AuthorsYiu, S., R. Schober, and L. Lampe
Conference NameCommunications, Computers and signal Processing, 2005. PACRim. 2005 IEEE Pacific Rim Conference on
Pagination53 - 56
Date Publishedaug.
Keywordsactive node, ad hoc networks, antennas, block codes, channel state information, colocated antennas, decode-and-forward relaying, differential distributed space-time block coding, diversity reception, information-carrying code matrix, optimisation, optimization, radio networks, sensor networks, space-time codes, unique node signature vector, wireless channels, wireless networks

In this paper, differential distributed space-time block codes (DSIBCs) are introduced. These differential DSTBCs are designed for wireless networks which have a large set of nodes N but at any given time only a small, a priori unknown subset of nodes S sub; N can be active. Channel state information is not required at the cooperating nodes nor at the receiver. The signal transmitted by an active node is the product of an information-carrying code matrix and a unique node signature vector. It is shown that existing differential STBCs designed for Nc ge; 2 co-located antennas are favorable choices for the code matrix guaranteeing a diversity order of d = min{Ns,Nc} if ns nodes are active. Efficient methods for the optimization of the set of signature vectors are provided. Possible applications of the proposed DSTBCs include ad hoc and sensor networks employing decode-and-forward relaying.


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