C. Geetha Priya

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Cognitive Radio Network (CRN) is an intelligent wireless communication system that adapts itself to variations in the incoming radio frequency stimuli by modifying the operating parameters. Using the spectrum sensing techniques, the idle channels are detected, and allocated to the Secondary Users (SUs). The existing cooperative spectrum sensing techniques(More)
The tremendous growth of internet supported by the extensive connectivity among systems within different networks has promoted the execution of class of unauthorized activities and has made their detection sophisticated. Preventing such unlawful acts are rarely possible and hence detecting them is an essential for ensuring the security of information(More)
An accurate frequency synchronization method using the zadoff-chu (ZC) constant envelop preamble is analyzed, and a new preamble weighted by pseudo-noise sequence is used for orthogonal frequency division multiplexing (OFDM) systems. Using this method, frequency offset estimator range is greatly enlarged with no loss in accuracy. The range of the frequency(More)
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