Journal Search Engine
The Journal of The Korea Institute of Intelligent Transport Systems Vol.9 No.3 pp.51-58
지능형 교통 시스템 적용을 위한 인지무선시스템의 스펙트럼 센싱 성능분석
Performance of Spectrum Sensing for Cognitive Radio Systems with ITS Applications
Abstract
According to dramatic increase of wireless communication demand, more spectrum resources are needed to support considerable and various wireless services, so cognitive radio(CR) was proposed to reuse unused frequency efficiently. Also, FCC revises its policies regarding the usage of the TV white spaces by unlicensed users. CR is an intelligent wireless communication system that is aware of the radio environment and is capable of adapting its operation to the statistical variations. Spectrum sensing is the key task of the CR systems. However, since spectrum sensing performance changes according to the received signal that is received various geography environment, regional characteristics are considered to estimate the path-loss. Therefore, for more accurate analysis and simulation, we demonstrate the spectrum sensing performance of CR system by various method applying Okumura-hata propagation model.
