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Leveraging coherent distributed space-time codes for noncoherent communication in relay networks via training

Rajan, Susinder G and Rajan, Sundar B (2009) Leveraging coherent distributed space-time codes for noncoherent communication in relay networks via training. In: IEEE Transactions On Wireless Communications, 8 (2). pp. 683-688.

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Abstract

For point to point multiple input multiple output systems, Dayal-Brehler-Varanasi have proved that training codes achieve the same diversity order as that of the underlying coherent space time block code (STBC) if a simple minimum mean squared error estimate of the channel formed using the training part is employed for coherent detection of the underlying STBC. In this letter, a similar strategy involving a combination of training, channel estimation and detection in conjunction with existing coherent distributed STBCs is proposed for noncoherent communication in Amplify-and-Forward (AF) relay networks. Simulation results show that the proposed simple strategy outperforms distributed differential space-time coding for AF relay networks. Finally, the proposed strategy is extended to asynchronous relay networks using orthogonal frequency division multiplexing.

Item Type: Journal Article
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Keywords: Cooperative diversity;distributed space time block code; noncoherent communication;training
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 05 Nov 2009 11:48
Last Modified: 19 Sep 2010 05:28
URI: http://eprints.iisc.ernet.in/id/eprint/19355

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