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A Review of Cooperative Spectrum Sensing in Cognitive Radios

  • Babak Ahsant
  • Ramanarayanan Viswanathan
Part of the Smart Sensors, Measurement and Instrumentation book series (SSMI, volume 1)

Abstract

Dramatically increasing requests for frequency bands in recent years, which has resulted in spectrum scarcity, lead us to examine the feasibility of dynamic spectrum access (DSA) technology. Cognitive radio (CR) has been considered as the key enabler of DSA because of its capability to perform spectrum sensing by using different detection techniques that guarantee acceptable probability of interference to primary users (PU), due to secondary user(s) (SU) access. Furthermore, cooperative spectrum sensing, which combines the observations/decision from a number of CR nodes, in order to determine the presence or absence of a PU signal, can yield better performance than that arrived by a single CR alone. This chapter provides a review of techniques and challenges encountered in cooperative spectrum sensing.

Keywords

Cognitive Radio Primary User Secondary User Cognitive Radio Network Fusion Center 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Department of Electrical & Computer EngineeringSouthern Illinois UniversityCarbondaleUSA
  2. 2.Department of Electrical EngineeringUniversity of Mississippi UniversityOxfordUSA

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