Interference-temperature limit for cognitive radio networks with MIMO primary users
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URI: http://hdl.handle.net/10902/9443ISBN: 978-1-4799-8298-1
ISBN: 978-1-4799-8297-4
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Publicado en
48th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, California, 2014, 1093-1097
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IEEE
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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.
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- D12 Congresos [545]
- D12 Proyectos de Investigación [426]