Utilization of idle time slot in spectrum sensing under noise uncertainty

Performance Analysis of Cooperative Spectrum Sensing under Noise Uncertainty

Spectrum sensing is a critical technology for primary user detection in cognitive radio networks, in which energy detector is widely used for spectrum sensing due to its generality and low complexity. However, noise uncertainty degrades the sensing performance of energy detection severely because of its dependence on the noise power. In this paper, we take the average power as the decision stat...

Signal Spectrum Sensing Robust to Noise Uncertainty

Lack of robustness against noise uncertainty is a bottleneck of current spectrum sensing strategies to detect the primary signals. Due to noise uncertainty, the performance of traditional detectors such as matched filters, energy detectors, and even cyclostationary detectors deteriorates rapidly at low Signal-to-Noise Ratio (SNR). In view of this, a new entropy-based spectrum sensing scheme is ...

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

Cooperative spectrum sensing with enhanced energy detection under GAUSSIAN noise uncertainty in cognitive radios

This paper presents optimization issues of energy detection (ED) thresholds in cooperative spectrum sensing (CSS) with regard to general Gaussian noise. Enhanced ED thresholds are proposed to overcome sensitivity of multiple noise uncertainty. Two-steps decision pattern and convex samples thresholds have been put forward under Gaussian noise uncertainty. Through deriving the probability of dete...

An Algorithm for Spectrum Sensing in Cognitive Radio under Noise Uncertainty

With increasing demand of new wireless applications and increasing number of wireless user’s problem of spectrum scarcity arises. Cognitive Radio technology supports dynamic spectrum access to address spectrum scarcity problem. Reliability of cognitive operation entirely depends upon how effectively task of spectrum sensing has been performed. Spectrum sensing is a process of discovering voids ...