Software Rad io , Cogn itive Rad io and Ultia te Rad io — A Prospect of W ireless Comm un ica tion

Through a review and outlook of three basic structures of software radio ( SR) p roposed by the author and the fundamental concep t of Cognitive Radio ( CR) , the paper p resents a new framework of CR and its corresponding cognitive cycle based on the p rincip le of electronic reconnaissance. Furthermore, faced w ith the existing p roblem s of CR , the author puts forward a new concep t of SR2 U ltimate Radio (UR ) based on the theory of blind source separation (BSS). The feasibility of realizing UR is also dis2