1st International ICST Workshop on Cognitive Networks and Communications

Research Article

Distributed Beamforming for Cognitive Radio Networks

  • @INPROCEEDINGS{10.1109/CHINACOM.2008.4685243,
        author={Yu Deng and Alister G. Burr and Dave Pearce and David Grace},
        title={Distributed Beamforming for Cognitive Radio Networks},
        proceedings={1st International ICST Workshop on Cognitive Networks and Communications},
        keywords={Cognitive radio interference reduction distributed beamforming synchronisation},
  • Yu Deng
    Alister G. Burr
    Dave Pearce
    David Grace
    Year: 2008
    Distributed Beamforming for Cognitive Radio Networks
    DOI: 10.1109/CHINACOM.2008.4685243
Yu Deng1,*, Alister G. Burr1, Dave Pearce1, David Grace1
  • 1: Communication Research Group, Department of Electronics, University of York, York, UK, YO10 5DD
*Contact email: yd105@ohm.york.ac.uk


We study a cognitive radio (CR) network with cognitive users communicating in the presence of a primary user. All users are uniformly distributed within a circle. Each user is equipped with a single ideal isotropic antenna. We propose a scheme in which all users collaboratively transmit the signal by adjusting the carrier phase of each transmitter such that the interference caused by the cognitive users to the primary user is reduced. The effect of noise in phase synchronisation on the resultant beampattern is analysed. The statistical distribution of the mainlobe and sidelobe power levels of the beampattern and the carrier-to-interference ratio (CIR) with phase offset is derived.