Cited By
View all- Spyrou EMitrakos D(2017)A Review on Cognitive Radio for MIMOProceedings of the 6th International Conference on Telecommunications and Remote Sensing10.1145/3152808.3152814(35-39)Online publication date: 6-Nov-2017
Adaptive spectrum management in MIMO-OFDM cognitive radio: an exponential learning approach
Pages 243 - 252
Abstract
In this paper, we examine cognitive radio systems that evolve dynamically over time as a function of changing user and environmental conditions. To take into account the advantages of orthogonal frequency division multiplexing (OFDM) and recent advances in multiple antenna (MIMO) technologies, we consider a full MIMO-OFDM Gaussian cognitive radio system where users with several antennas communicate over multiple non-interfering frequency bands. In this dynamic context, the objective of the network's secondary users (SUs) is to stay as close as possible to their optimum power allocation and signal covariance profile as it evolves over time, with only local channel state information at their disposal. To that end, we derive an adaptive spectrum management policy based on the method of matrix exponential learning, and we show that it leads to no regret (i.e. it performs asymptotically as well as any fixed signal distribution, no matter how the system evolves over time). As it turns out, this online learning policy is closely aligned to the direction of change of the users' data rate function, so the system's SUs are able to track their individual optimum signal profile even under rapidly changing conditions.
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Published In
December 2013
336 pages
ISBN:9781936968480
- General Chair:
- Andras Horvath,
- Program Chairs:
- Peter Buchholz,
- Vittorio Cortellessa,
- Luca Muscariello,
- Mark Squillante
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- EAI: The European Alliance for Innovation
- ICST
In-Cooperation
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ICST (Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering)
Brussels, Belgium
Publication History
Published: 10 December 2013
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ValueTools '13
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- EAI
ValueTools '13: 7th International Conference on Performance Evaluation Methodologies and Tools
December 10 - 12, 2013
Torino, Italy
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View all- Spyrou EMitrakos D(2017)A Review on Cognitive Radio for MIMOProceedings of the 6th International Conference on Telecommunications and Remote Sensing10.1145/3152808.3152814(35-39)Online publication date: 6-Nov-2017
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