Abstract
With time there is an increase in demand and usage of wireless services and applications. For efficiently utilizing the network bandwidth and memory space resources, a cognitive radio network is necessary. Spectrum sensing is the major functionality in CRN. It is the most crucial state included since the entire functionality completely relies on this stage. Schemes like energy detector, matched filter, pilot-based coherent detection, etc. exist for spectrum sensing their performance degrades as the presence of noise increases. Thus cyclostationary detector fulfills the necessary specifications of discovering the spectrum in the presence of low SNR. In this technique, the periodicity exhibited by the signal is utilized and enhanced by taking the similarity using the auto-correlation. The peaks of frequencies thus form a resultant of the correlated signal with Fourier transform with certain specificity to the signal to determine the presence of a primary user. On the contrary, the non-periodicity and random nature of noise don’t highlight it when taking correlation.
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Mahajan, K., Garg, U. An enhancement to the existing cyclostationary feature detection in CRN. Multimed Tools Appl 81, 37087–37099 (2022). https://doi.org/10.1007/s11042-022-13527-2
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DOI: https://doi.org/10.1007/s11042-022-13527-2