DOI: 10.5281/zenodo.57992 ABSTRACT A cognitive radio by virtue of its ability to sense and adapt to the dynamic spectrum scenario, can increase the spectral efficiency .In order to be non invasive, a cognitive radio must adhere to strict benchmark in the quality of spectrum sensing for primary users of a band.Thus, spectrum sensing has a major role to play in cognitive radio .Many algorithms ha...

w w w . i j e c t . o r g 240 InternatIonal Journal of electronIcs & communIcatIon technology Abstract Spectrum sensing has reborn as a very active research area over recent years. As it is one of the most important task performed by cognitive radio and the performance of the other functions of cognitive radio is based on the spectrum sensing. So it is very necessary for cognitive radio to perf...

Radio Spectrum is regarded as a fundamental unit in Wireless communication network, as it plays an important role of transmission medium; and with the advent of technologies dealing with radio spectrum; cognitive radio has emerged as a effective solution to the problem of limited radio spectrum. Cognitive radio uses spectrum sensing to study surrounding environment and to demonstrate the approp...

Spectrum sensing is a key function in cognitive radio networks to detect vacant frequency bands for secondary (unlicensed) users without causing any interference to the transmission of primary (licensed) users. Due to the destructive conditions of sensing channel such as multipath fading and shadowing, a local sensing may not be able to meet the requirements for reliable sensing. Therefore, coo...

In cognitive radio, spectrum sensing is a challenging task. In this letter, a new spectrum sensing method is proposed based on Goodness of Fit test (GoF) of the energy of the received samples with a chi-square distribution. We derive the test statistic and evaluate the performance of the proposed method by Monte Carlo simulations. It is shown that our proposed spectrum sensing method outperform...

Cognitive Radio (CR) has risen as a tempting solution to the problem of spectral inefficiency as it performs sensing of the radio environment, sharing it without harmful interference to Primary Users (PU) and quickly quitting the frequency band if the corresponding licensed user emerges. Spectrum Sensing is the most crucial task for the establishment of cognitive radio based communication mecha...

With the technological advancement in wireless applications more effective and efficient utilization of the available spectrum became the urgent requirement. According to the IEEE 802.22 standard the unlicensed secondary devices can operate in the licensed TV band, because this is the high underutilized licensed band, so long they do not interfere the licensed primary users. Therefore the secon...

Rapid development of new and ever expanding wireless applications and services, spectrum resources are facing huge demands. Currently, spectrum allotment is done by giving each new service with its own fixed frequency block. As more and more technologies are moving towards fully wireless, demand for spectrum is enhancing. In this context, a new technology, cognitive radio (CR) has been come out...

Cognitive radio is a promising technology aiming to solve the spectrum scarcity problem by allocating the spectrum dynamically to unlicensed users. It uses the free spectrum bands which are not being used by the licensed users without causing interference to the incumbent transmission. So, spectrum sensing is the essential mechanism on which the entire communication depends. If the spectrum sen...