Dynamic programming: deterministic and stochastic models
Dynamic programming: deterministic and stochastic models
Fundamental design tradeoffs in cognitive radio systems
TAPAS '06 Proceedings of the first international workshop on Technology and policy for accessing spectrum
On myopic sensing for multi-channel opportunistic access: structure, optimality, and performance
IEEE Transactions on Wireless Communications - Part 2
Decentralized quickest change detection
IEEE Transactions on Information Theory
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Spectrum sensing, which monitors the spectrum activity, is studied for cognitive radio systems using multiple frequency bands with non-negligible band switching time (blind period). Due to hardware limitation, it is assumed that only a subset of frequency bands can be monitored simultaneously. The problem of controlling the monitoring procedure is studied in the frameworks of dynamic programming (DP). System states and cost functions are defined. Cost-to-go functions for DP are derived, simplified and approximated, based on which control policies are derived. Numerical results are provided to demonstrate the proposed algorithms.