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

View/Open
Identificadores
URI: http://hdl.handle.net/10902/9443
ISBN: 978-1-4799-8298-1
ISBN: 978-1-4799-8297-4
Compartir
Estadísticas
View Usage Statistics
Google Scholar
Full record
Show full item record
Author
Lameiro Gutiérrez, ChristianAutoridad Unican; Utschick, Wolfgang; Santamaría Caballero, Luis IgnacioAutoridad Unican
Date
2014
Derechos
© 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
Publisher
IEEE
Enlace a la publicación
Palabras clave
Interference temperature
Cognitive radio
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.
Collections to which it belong