The Design And Implementation Of Data Processing Module In Broadband Cognitive Radio Communications Platform

With the development of wireless communication technology, the demands for high-speed broadband communications networks and services increasingly high, but how to provide high-speed broadband data communication services under severe electromagnetic interference environments becomes a difficulty study. Cognitive radio technology has a strong ability of spectrum sensing, which can improve the anti-jamming capability of broadband communications, but is focused on theoretical research and has rarely practical applications at the present stage. So, it has a strong practical significance to integrate cognitive radio module into broadband communications system and make full use of the spectrum sensing capabilities of cognitive radio to the anti-jamming capability of broadband communications.According to the demands, our project team have designed and implemented the broadband cognitive radio platform, and data processing module is one of the important modules in the platform. This paper improves the original design program of broadband cognitive radio platform on the preliminary work, then designs and implements a central data processing module with cognitive radio function based on improved SNR weighted collaborative detection, which can detect whether the work frequency is interfered through real-time frequency sensing and replace the interfered work frequency with the better performance of backup frequency so that improve the anti-jamming capability of broadband communications platform and guarantee high-speed data communication in serious interference harsh environments.The module is tested over the broadband cognitive radio communications platform, and the results show that the module designed in this paper can dynamically update broadband communications frequencies to avoid interference and improve the anti-jamming capability of the platform, which achieves the design requirements.