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

Autor:	Rajan, G. Susinder, Rajan, B. Sundar
Rok vydání:	2008
Předmět:	Computer Science - Information Theory
Druh dokumentu:	Working Paper
Popis:	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. Comment: 14 pages, 5 figures, to appear in IEEE Transactions on Wireless Communications
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0804.3155 Zobrazit plný text záznamu View this record from Arxiv