Channel Availability Assessment for Cognitive Radios

António Furtado (1, 2) , Miguel Luís (3, 1) , Rodolfo Oliveira (3) , Rui Dinis (3, 1) , Luis Bernardo (3)

1 Instituto de Telecomunicações [Lisboa, Portugal]
2 ISR, Instituto de Sistemas e Robótica
3 ULISBOA - Universidade de Lisboa = University of Lisbon

This work addresses two problems related with the assessment of channel availability for cognitive radio systems. We start to characterize the performance of an energy detector for the case when PUs can change their state during the sensing period. The theoretical performance is validated through simulations and compared with a theoretical model where the PUs’ state remains constant during the sensing period. The second point addressed in this work is the characterization of the channel availability, which is based on the output of the energy detector weighted by the probabilities of detection or false alarm computed in real-time. Several scenarios were evaluated and for each scenario the channel availability was correctly assessed by the SUs.

Mots clés: Cognitive radio networks; Energy Sensing; System Analysis

Domaines: Informatique [cs]

António Furtado, Miguel Luís, Rodolfo Oliveira, Rui Dinis, Luis Bernardo. Channel Availability Assessment for Cognitive Radios. 4th Doctoral Conference on Computing, Electrical and Industrial Systems (DoCEIS), Apr 2013, Costa de Caparica, Portugal. pp.495-504, ⟨10.1007/978-3-642-37291-9_53⟩. ⟨hal-01348795⟩