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DMT of parallel-path and layered networks under the half-duplex constraint

Sreeram, K and Birenjith, S and Kumar, Vijay P (2013) DMT of parallel-path and layered networks under the half-duplex constraint. In: IEEE Transactions on Information Theory, 59 (6). pp. 3875-3891.

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Official URL: http://dx.doi.org/ncsiparameshs


In this paper, we study the diversity-multiplexing-gain tradeoff (DMT) of wireless relay networks under the half-duplex constraint. It is often unclear what penalty if any, is imposed by the half-duplex constraint on the DMT of such networks. We study two classes of networks; the first class, called KPP(I) networks, is the class of networks with the relays organized in K parallel paths between the source and the destination. While we assume that there is no direct source-destination path, the K relaying paths can interfere with each other. The second class, termed as layered networks, is comprised of relays organized in layers, where links exist only between adjacent layers. We present a communication scheme based on static schedules and amplify-and-forward relaying for these networks. We also show that for KPP(I) networks with K >= 3, the proposed schemes can achieve full-duplex DMT performance, thus demonstrating that there is no performance hit on the DMT due to the half-duplex constraint. We also show that, for layered networks, a linear DMT of d(max)(1 - r)(+) between the maximum diversity d(max) and the maximum MG, r(max) = 1 is achievable. We adapt existing DMT optimal coding schemes to these networks, thus specifying the end-to-end communication strategy explicitly.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to IEEE-Inst Electrical Electronics Engineers Inc.
Keywords: Amplify-and-Forward Protocols; Cooperative Diversity; Diversity-Multiplexing Gain Tradeoff; Explicit Codes; KPP Networks; Layered Networks; Multi-Antenna Networks; Multi-Hop Networks; Relay Networks
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Depositing User: Francis Jayakanth
Date Deposited: 03 Sep 2013 08:35
Last Modified: 03 Sep 2013 08:35
URI: http://eprints.iisc.ac.in/id/eprint/46979

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