Abstract:

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 communication system and make full use of the spectrum sensing capabilities of cognitive radio to improve the anti-jamming capability of broadband communications. This paper presents the design and implementation of a data processing module with cognitive radio function based on the broadband communication platform. It uses an improved SNR weighted cooperative detection algorithm for real-time broadband spectrum sensing to determine whether the work frequency is interfered, and replaces the interfered work frequency with the better performance of backup frequency to avoid interference and improve the anti-jamming capability of broadband communication platform. Finally, the module is tested over the broadband communications platform, the results show that the module designed in this paper can dynamically update broadband communication frequencies to avoid interference and improve the anti-jamming capability of the platform, which achieves the design requirements.

Key words: cognitive radio, broadband communication, multi-user collaborative detection