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Cognitive radio technique is applied to Vehicular Ad hoc Networks (VANET) to increase frequency bandwidth. Spectrum sensing for opportunistic spectrum access is carried out collaboratively among neighboring vehicles. For the collaborative spectrum sensing, Belief Propagation (BP) is applied to tackle the distributed observations and to exploit redundancies in both space and time. The corresponding performance is analyzed for a three-vehicle case and is demonstrated using numerical simulations.
Date of Conference: 16-19 May 2010