A Novel Power Control Algorithm for Cognitive Radio in Environmental Monitoring

Cognitive radio (CR) is a revolutionary technology of wireless mobile communication. Smart users can use the CR technology to sense the surrounding environment, search for available spectrum resources and access spectrum dynamically. Therefore, the efficiency of spectrum can be improved and the capacity of wireless communication system will be increased. The cognitive radio technology is introduced in the environmental monitoring. And a novel power control algorithm is proposed. This algorithm is based on the interference temperature model, the game theory and the second degree iterative water-filling algorithm, which is applied to the environment monitor wireless network with the restricted energy, memory, computing and communication. The scenario simulations of the environmental monitoring based on the novel algorithm and the traditional one are performed, respectively. The results show that the novel algorithm can obtain favorable network performance while the computational time can be reduced notablely.