Cognitive Radio for Public Safety -An Overview

Vaishali Pande


the radio frequency spectrum is a scarce natural resource and its efficient use is of the utmost importance. A fundamental problem facing the future wireless systems is where to find suitable spectrum bands to meet the demands of future services .Cognitive Radio has been proposed as a promising technology to solve the imbalance between spectrum scarcity and spectrum under utilization. Cognitive radios are aware, flexible and intelligent and they allow a radio to understand the wireless environment and make autonomous decisions to adapt themselves for efficient operation.CR technologies will enables new public safety systems to share spectrum and permit dynamically available spectrum use with existing legacy devices. This paper provides an overview of cognitive radio and addresses the impact of CR technologies on the public safety community and spectrum management.

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