Predictive Oppertunistic Spectrum Access Using Markov Models Cognitive radios (CR) can sense and detect temporarily available spectral holes for an opportunistic operation to improve the spectral efficiency and coexistence of industrial radio systems. It will be of particular interest for a CR system to apply predictive modeling in order to forecast the behavior of the coexisting environment. A secondary cognitive user shall use preemptive tuning of its operating parameters following the predictive model. However, a considerable challenge is to generate an accurate model and predict efficiently in order to meet strict time related requirements of industrial applications. Such predictive modeling has already gained some attention but real-time experimental results have never been reported to the best of our knowledge. In this contribution we investigate the performance of a Markov model based CR system using simulative and experimental environments for its application in industrial systems. IEEE