A single FPGA embedded framework for secondary user in cognitive network

The cognitive radio technology is very helpful in improving the use of spectrum resources and reacting its operating environment. This paper presents a novel embedded framework for secondary user based a single FPGA in cognitive network. By analyzing the processing ability of FPGA and evaluating the existed architecture, this framework based FPGA supplying more logic resources and stronger embedded CPU can support spectrum sensing and the transmission of complex communication protocols. In a single FPGA, we refer that the hardware and software mapped framework can realize the function of cognition easily. Meantime the pre-exist library and design tools can improve the efficiency of cognitive radio design. At last, we introduce the mechanism of this single FPGA embedded framework and demonstrate this framework by a practical application. Results of the application show that this framework can flexibly switch between sensory mode and transmission mode, which can meet the demands of secondary user in the cognitive network.