Degrees of freedom of the rank-deficient MIMO X channel

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To access the full text documents, please follow this link: http://hdl.handle.net/2117/21679

dc.contributor	Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.contributor	Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions
dc.contributor.author	Agustín de Dios, Adrián
dc.contributor.author	Vidal Manzano, José
dc.date	2013
dc.identifier.citation	Agustin, A.; Vidal, J. Degrees of freedom of the rank-deficient MIMO X channel. A: IEEE Information Theory Workshop. "Proceedings of the ITW 2013". Sevilla: 2013.
dc.identifier.uri	http://hdl.handle.net/2117/21679
dc.language.iso	eng
dc.relation	http://itw2013.tsc.uc3m.es/program#S1569475527
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Antenes i agrupacions d'antenes
dc.subject	Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica
dc.subject	MIMO systems
dc.subject	Antennas (Electronics)
dc.subject	MIMO
dc.subject	X-channel
dc.subject	Degrees of Freedom
dc.subject	Sistemes MIMO
dc.subject	Antenes (Electrònica)
dc.title	Degrees of freedom of the rank-deficient MIMO X channel
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	info:eu-repo/semantics/conferenceObject
dc.description.abstract	The multiple-input multiple-output (MIMO) X channel with rank-deficient channels is considered. We characterize the total degrees of freedom (DoF) by defining an outer bound which is attained by the proposed precoding scheme. The total DoF are described in closed-form when all transmitters and receivers have M and N antennas, respectively. For an arbitrary number of antennas, the total DoF are obtained as solution of a linear programming problem. Results elucidate that, unlike point-to-point MIMO systems where DoF increase with the rank of the channel, the total DoF in a ultipoint-to-multipoint MIMO system can increase up to a certain point if channels are ankdeficient. Hence, we corroborate the relevance of knowing the rank-deficiency in the MIMO X channel, a property already observed in the MIMO Interference channel.
dc.description.abstract	Peer Reviewed

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