Electrical Engineering
      and Computer Sciences

Electrical Engineering and Computer Sciences

COLLEGE OF ENGINEERING

UC Berkeley

   

2009 Research Summary

Accumulative Interference Modeling for Cognitive Radios with Distributed Channel Access

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Ahmad Bahai, Sofie Pollin and Michael Timmers1

UC MICRO, Interuniversity Micro-Electronics Center (IMEC), European Commission

A Cognitive Radio (CR) network should be able to sense its environment and adapt its communication to utilize unused licensed spectrum without interfering with incumbent users. Properly modeling the expected interference from the CR network is therefore very important in the definition of coexistence rules to efficiently protect the incumbent user. In this project we will model the accumulative interference generated from a large-scale CR network and investigate how the CR network density will affect the sensing requirements to meet an interference constraint. More specifically, our model considers the impact of discrete topology, the impact of imperfect sensing and the impact of the distributed channel access scheme. This will enable a more realistic analysis and simplify the development of more intelligent power control algorithms.

[1]
M. Timmers et al., "Accumulative Interference Modeling for Cognitive Radios with Distributed Channel Access," International Conference on Cognitive Radio Oriented Wireless Networks and Communications, 2008.

1Interuniversity Micro-electronics Center