Collaborative Spectrum Sensing in Cognitive Radio Vehicular Ad Hoc Networks: Belief Propagation on Highway
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. Vehicular Ad hoc NETworks (VANET) provide the capability of wireless inter-vehicle communications and increased safety, comfort and information agility for vehicles on the road.