Andreas Pape

A cognitive radio approach to realize coexistence optimized wireless automation systems

The need for multiple radio systems in overlapping regions of a factory floor introduces a coexistence problem. The current research challenge is to design and realize radio systems that should be able to achieve a desired quality of service (QoS) in harsh, time-varying, coexisting industrial environments. As a solution cognitive radio (CR) built on top of a reconfigurable platform like software defined radio (SDR) can provide the required system properties. We provide a literature survey about existing coexistence problems and solutions and implement a CR testbed for experimental investigations. It can exploit three dimensions of the hyperspace, which are frequency, time, and transmission power. This CR testbed is investigated in the coexistence of typical radio systems. The experimental results show satisfactory robustness against any of these interferers.

A Generic Cognitive Radio for Evaluating Coexistence Optimized Industrial Automation Systems

The need for multiple radio systems in overlapping regions of a factory plant introduces a coexistence problem. The current research challenge is to design and realize radio systems that should be able to achieve a desired quality of service (QoS) in this coexisting environment. Currently transmission resources of hyperspace are not properly exploited. The cognitive radio (CR), which can adapt to the environmental changes by reconfiguring itself, can be used to implement intelligent radio systems to exploit the orthogonal nature of multiple dimensions of hyperspace to maintain the desired QoS in coexisting factory environments. We present initial results of a coexistence optimized CR which can exploit frequency and power, which are two of several dimensions of hyperspace, to improve its QoS in coexisting environments.