An inter-frame dynamic double-threshold energy detection for spectrum sensing in cognitive radios

Optimized Cooperative Spectrum Sensing in Cognitive Radio Networks Based on Dynamic Threshold Energy Detector

Cognitive radio is a seemly hopeful technology for future. Spectrum sensing is the most important function of cognitive radio. Most of the spectrums sensing techniques proposed become dysfunctional at lower signal to noise ratio environments. This paper proposes a reliable spectrum sensing algorithm for cooperative cognitive network. A dynamic threshold updating method is developed for which th...

Investigation of Always Present and Spectrum Sensing based Incumbent Emulators

Cognitive radio (CR) technology has been suggested for effective use of spectral resources. Spectrum sensing is one of the main operations of CR users to identify the vacant frequency bands. Cooperative spectrum sensing (CSS) is used to increase the performance of CR networks by providing spatial diversity. The accuracy of spectrum sensing is the most important challenge in the CSS process sinc...

A Cyclostationarity-Based Spectrum Sensing Scheme for Cognitive Radios With Dynamic Primary User Signals

This paper addresses a cyclostationarity-based spectrum sensing scheme for cognitive radios in dynamic primary user (PU) traffic environments where the PU might randomly depart or arrive during the sensing period. At first, the spectrum sensing problem in dynamic PU traffic environments is formulated as a binary hypothesis testing problem. Then, a test statistic for spectrum sensing is derived ...

Energy Efficient local spectrum sensing algorithm to detect OFDM based P.U Detection in Cognitive Radios

Cognitive radio is used for improving the radio electromagnetic spectrum. The Cognitive Radio determines the occupancy of frequency spectrum. Spectrum sensing forms a key front end block to study optimal detection method as modified energy detection (MED) and equal gain detection (EGD).The main study is to ease constraints of bandwidth and utilization techniques of spectral holes in unutilized ...

Dynamic-Double-Threshold Energy Detection Scheme for spectrum sensing Under Noise Uncertainty in Cognitive Radio System