Research on the Effect of the Adjustable Parameter Applied to Information Theoretic Criteria Based Spectrum Sensing Method

摘要

Cognitive radio is now emerging as a popular technology to end the resource scarcity. Cognitive radio has four fundamental technologies that is spectrum sensing, resource allocation, disturbance avoidance and opportunistic spectrum access. Among them, spectrum sensing technology is the foremost. Blind sensing method attracts much attention for its easiness to implement and the few requirements for prior knowledge. The spectrum sensing method employing Information Theoretic Criteria (ITC) method is a blind sensing technology that can sense the activity of primary user with little prior information. However, it can not agilely set the false alarm probability which is usually required in communication systems. In this paper, a research on the effect of the adjustable parameter is carried out. The effectiveness of this method is set up by simulation in several scenarios with different numbers of sampling samples and receiving antennas. It is shown in the simulation that the adjustable parameter can change the false alarm probability on the basis of the requirement of the system and also the sensing method with an adjustable parameter can overcome the noise uncertainty.