Leveraging Coherent Distributed Space-Time Codes for Noncoherent Communication in Relay Networks via Training

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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 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.
14 pages, 5 figures, to appear in IEEE Transactions on Wireless Communications

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Information Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/168174

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0804.3155
 http://arxiv.org/abs/0804.3155

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arXiv