Interference-temperature limit for cognitive radio networks with MIMO primary users

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URI: http://hdl.handle.net/10902/9443
ISBN: 978-1-4799-8298-1
ISBN: 978-1-4799-8297-4
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Autoría
Lameiro Gutiérrez, ChristianAutoridad Unican; Utschick, Wolfgang; Santamaría Caballero, Luis IgnacioAutoridad Unican
Fecha
2014
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© 2014 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
48th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, California, 2014, 1093-1097
Editorial
IEEE
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Palabras clave
Interference temperature
Cognitive radio
Resumen/Abstract
This paper derives the interference-temperature (IT) limit for a multi-antenna primary user (PU) with a rate constraint. While in the case of a single-antenna PU there is a one-to-one mapping between IT and achievable rate, this correspondence does not hold anymore when a multiple-input multiple-output (MIMO) system is considered. In such cases, the spatial distribution of the interference must be taken into account, since it strongly affects the PU performance. To this end, we derive a closed-form expression for the maximum IT that can be tolerated by identifying the worst-case interference covariance matrix, which results in a multilevel waterfilling problem.
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