On the spatial degrees of freedom benefits of reverse TDD in multicell MIMO networks

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URI: http://hdl.handle.net/10902/11092
ISBN: 978-0-9928-6265-7
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Autoría
Fanjul Fernández, Jacobo; Santamaría Caballero, Luis IgnacioAutoridad Unican
Fecha
2016
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© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Publicado en
24th European Signal Processing Conference (EUSIPCO), Budapest, 2016, 1363-1367
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IEEE
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Palabras clave
Interference alignment
Cellular networks
Heterogeneous networks
Reverse TDD
Degrees of freedom
Resumen/Abstract
In this paper we study the degrees of freedom (DoF) achieved by interference alignment (IA) for cellular networks in reverse time division duplex (R-TDD) mode, a new configuration associated to heterogeneous networks. We derive a necessary feasibility condition for interference alignment in the multi-cell R-TDD scenario, which is then specialized to the particular case of symmetric demands and antenna distribution. We show that, for those symmetric networks for which the properness condition holds with equality, R-TDD does not improve the DoF performance of conventional synchronous TDD systems. Nevertheless, our simulation results indicate that, in more asymmetric scenarios, significant DoF benefits can be achieved by applying the R-TDD approach.
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