Spectrum Sensing Techniques for a Cognitive Radio Network

This paper carries out a detailed review of the various techniques that have emerged in spectrum sensing in the recent years in cognitive radio (CR). It discusses the current innovations in techniques and algorithms, and within this context, the operation of an intelligent wireless communication system using CR technology has been reviewed. The important techniques used in past are also tabulated. Various technical papers and articles on wireless communication and CR systems have been analyzed. The paper takes an inquisitive approach to the proposals and prototypes of an effective spectrum sensing technique obtained using various algorithms, which can be used to eliminate the spectrum scarcity and overcrowdings. After reviewed various techniques, we work on data rate improvement and suggest a method of improving the quality by maintaining the BER at an average level by adaptive modulation.