Cross Layer Based Cooperative Spectrum Sensing for Cognitive Radio Networks

Abstract

The Cognitive Radio(CR) is an intelligent and efficient technology needed in today's wireless environment to make use of the underutilized spectrum resources.The CR users have to continuously sense the spectrum before accessing to avoid the interference with the primary user. Spectrum sensing is primarily a physical layer function. Sharing the sensing information is needed for the cooperative detection. It necessitates a cross layer design between spectrum sharing and spectrum sensing.The cross layer design approach is proposed by reviewing the performance of the energy detection and Orthogonal Frequency Division Multiplexing(OFDM)Sensing technique.Also,the more number of CR users are involved to analyze the results of the cooperative spectrum sensing. Finally,the probability of detection and the probability of false alarm for the different number of samples and signal to noise ratio values are analyzed and presented for the proposed framework

Analysis of the Monitoring and Identification Effect of Cognitive Service Technology on Dc System in Power Grid

“…These have played a part in the blackouts that have occurred throughout the previous forty years [5]. Additional deterrents include the growing population and energy demand, the consequences of climate change, equipment failures, problems with energy storage, and limitations in the capacity of electricity generation, one-way interaction, the depletion of fossil fuels, and resilience concerns [6]. Furthermore, the transportation and power sectors are responsible for a large portion of Earth's greenhouse gas emissions [7].…”