| Popis: |
Publisher Summary Radio evolution has taken the path toward more digital realizations and more software capabilities. The original introduction of software made possible software capable radios that communicate and process signals digitally. In the pursuit of flexibility, software programmable radios, and the even more flexible SDR, have become the standard in the military arena and are starting to gain favor in the commercial world. The emergence of aware radios, adaptive radios, and finally cognitive radios (CRs), and have traced the continuum among these various degrees of capability. This chapter presents a CR roadmap, including a discussion of CR technologies and applications. It presents a taxonomy of radio maturity and discusses enabling and required technologies for CRs. They present three classes of cognitive applications, one of which may be the next killer application for wireless devices. Conjectures regarding the development of CR are included in with arguments for their validity. |
