An image based ray-tracing approach is utilized to predict the capacity of a multiple input multiple output (MIMO) indoor wireless communication system. The results are compared to measured capacity and path loss values. The sensitivity of the spectrum efficiency estimation to physical propagation parameters such as electric permeability and conductivity of the transmission and reflection walls...

In this paper, we focus on a dynamic spectrum access strategy for Internet of Things (IoT) applications in two types of radio systems: cellular networks and cognitive radio-enabled low power wide area networks (CR-LPWANs). The spectrum channel contention between the licensed cellular networks and the unlicensed CR-LPWANs, which work with them, only takes place within the cellular radio spectrum...

To solve the shortage defects of wireless spectrum source of Internet of things, an idle spectrum resources and immune sorting selection method based on the subjective and objective weight is proposed by using cognitive radio network technology. Firstly, the radio cognitive idle spectrum system is relied on to make the spectrum system modeling of Internet of things for the generation of objecti...