Spectrum Sharing in Cognitive Radio Based on Spatial Coding

In cognitive radio, secondary users wittily occupy the spectrum hole and enhance the efficiency at the right location and time. Secondary users reward a chance to access primary user band with the aid of smart cognitive radio technology. In this study we explore the idea of secondary access spectrum through using the cognitive radio network in which the secondary user shares the spectrum with the primary user and defends the primary user from the detrimental interference. Spatial coding akin to adaptive beam-forming and null steering are utilized for appropriate spectrum sharing in cognitive radio. By using these algorithms in cognitive systems, secondary transmitter steers the beam in the direction of secondary receiver and generate the nulls in primary direction so that the minimum interference spawn toward the primary receiver. Simulation outcome established the strength and efficiency of the spectrum sharing.