A Sequential Energy Detection Based Spectrum Sensing Scheme in Cognitive Radio

A Sequential Energy Detection Based Spectrum Sensing Scheme in Cognitive Radio

Reliable and swift spectrum sensing is a crucial technical challenge of cognitive radio. This study proposes a Sequential Energy Detection (SED) scheme to reduce the average required sample number and sensing time for spectrum sensing in low signal-to-noise ratio regime. In the scheme, the data samples are first grouped into data blocks and the Sequential Probability Ratio Test (SPRT) use the e...

Cooperative Spectrum Sensing by Sequential Change Detection in Cognitive Radio

This paper proposes the solution for Spectrum Sensing Problems in Cognitive Radio Networks. For this an Adaptive CUSUM based Test for signal Change Detection algorithm is used. The algorithm is based on sequential change detection techniques which is particularly effective when the parameters are not available apriori or when the correct parameter configuration and the pdf of the signal under t...

Energy Detection Performance of Spectrum Sensing in Cognitive Radio

Spectrum sensing is a challenging task for cognitive radio. Energy detection is one of the popular spectrum sensing technique for cognitive radio. In this paper we analyze the performance of energy detection technique to detect primary user (PU). Simulation results show that the probability of detection increases significantly when signal to noise ratio increases. It is also observed that the d...

Energy Detection Technique for Spectrum Sensing in Cognitive Radio

With unprecedented growth of the subscribers in modern cellular and wireless data communications, there is an acute scarcity of additional bandwidth to meet the ever growing demand. To ease the constraint of additional bandwidth, utilization of the existing system has been a topic of recent interest. Cognitive Radio is a new technique in which the spectral holes in unutilized spectrum are deter...

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