A Study on Estimation Method of Communication Area Using Cooperated Monitoring of Communication Quality in Cognitive Radio

In the field of Cognitive Radio, to avoid influence to the communication quality of PU (Primary User) and to realize the communication of SU (Secondary User) simultaneously can be technical subjects. In these issues, the sensing technology where the PU signals are detected has been proposed, however, neither the communication area of PU nor the influence to communication quality of PU from SU cannot be estimated sufficiently. In this paper, the method of how to decide the communication area based on communication quality estimation which is a technique by using pseudo error is proposed and the numerical results based on simulation are discussed as well. According to the results, the effectiveness of the proposal is shown. Moreover, the influence to the communication quality of PU by SU is shown by using the relationship between the power and distance as well.