OFDM-Based Dynamic Spectrum Access

Optimal utilization of radio resources (bandwidth, transmit power) in multi-carrier based systems becomes very challenging due to coexistence of various wireless standards within the same frequency band. One possible solution is dynamic spectrum access (DSA) approach that allows several standards or users to opportunistically share the available spectrum resources without introducing mutual interference. Proposed demonstration, implemented in GNU Radio framework, enables interference-free coexistence of two OFDM-based systems within a common frequency band with optimally configured transmission parameters for given system constraints. Furthermore, a highly reconfigurable framework allows for implementation and evaluation of various transmission strategies for different DSA scenarios, different classes of given requirements and various sets of controllable parameters.