Performance evaluation of spectrum database access with interference alignment in cognitive radio enabled vehicles

Cognitive radio intelligently adapts particular transmission or reception parameter by sensing the environment. It has got an extraordinary consideration to enhance spectrum usage. Spectrum efficiency is increased by enabling secondary users to access spectrum resource, when it is not being occupied by primary users. Cognitive radio vehicular networks are formed for the efficient use of the licensed spectrum for high-bandwidth vehicular informing, driver-help capacities, and traveler amusement administrations. In CR vehicular systems, spectrum information is refreshed by the CR empowered vehicles to maintain the spectrum information is relevant to the current position of the vehicle. The vehicle should finish the information exchanges with roadside base stations (BSs) in short collaboration times to discover the PUs activity since the vehicles have high mobility. By using interference alignment, the message transmission time between BSs and CR vehicles is reduced. The messages are transmitted in fewer time slots. Power consumption is a major problem in communications. In this paper the power consumption is reduced by using an energy-efficient distributed opportunistic interference alignment (OIA) scheme. By using this method the throughput gets increased when compared to the conventional interference alignment (OIA) method.