Dynamic spectrum access and cognitive radio

Abstract

Radio spectrum is natural limited resource, which cannot be owned. Many new technologies are emerging which require spectrum for faster growth. ITU has projected that 1720 MHz spectrum will be required by the year 2020. Several services are knocking the door of telecom market but these promising services cannot be rolled out due to non-availability of spectrum. To meet this demand, spectrum should be managed dynamically instead of static. Cognitive radio is the best future technology, which would help to meet the ever increasing demand of radio spectrum and also help in managing radio resource in more simplified way. Dynamic spectrum management will provide conducive environment for implementation of cognitive radio based network. This paper gives an overview about shortcomings of current spectrum management and about dynamic spectrum access.