Wavelet-Based Spectrum Sensing for Cognitive Radios using Hilbert Transform
نویسندگان
چکیده
For cognitive radio networks, there is a major spectrum sensing problem, i.e. dynamic spectrum management. It is an important issue to sense and identify the spectrum holes in cognitive radio networks. The first-order derivative scheme is usually used to detect the edge of the spectrum. In this paper, a novel spectrum sensing technique for cognitive radio is presented. The proposed algorithm offers efficient edge detection. Then, simulation results show the performance of the first-order derivative scheme and the proposed scheme and depict that the proposed scheme obtains better performance than does the first-order derivative scheme. Keywords—cognitive radio, Spectrum Sensing, wavelet, edge detection
منابع مشابه
Discrete Wavelet Transform Based Spectrum Sensing in Cognitive Radios Using Eigen Filter
In the developing world, the usage of Mobile phones and other data communication devices are unavoidable which results in the congestion of Spectrum. Recent studies have showed that nearly 70% of spectrum was unused most of the time. The band width becomes expensive due to shortage of frequencies. Therefore to use the spectrum effectively, we need to identify whether the spectrum is occupied or...
متن کاملA Survey of Communication Systems in Cognitive Radio for Intelligent Sensing of Spectrum
With the increasing data communication these days, the congestion and quality of transmission are degrading big time. The availability of spectrum is becoming a big issue for the private organizations to manage a huge number of users. Thus there is an urgent need for Smart Spectrum allocation through the Intelligent Spectrum Sensing. Cognitive Radios are designed for the same. But which communi...
متن کاملCentralized Integrated Spectrum Sensing for Cognitive Radios
Spectrum sensing is the challenge for cognitive radio design and implementation, which allows the secondary user to access the primary bands without interference with primary users. Cognitive radios should decide on the best spectrum band to meet the Quality of service requirements over all available spectrum bands. This paper investigates the integrated centralized spectrum sensing techniques ...
متن کاملWavelet Packet Transform Based Energy Detector for Spectrum Sensing
Rapid growth of wireless applications and services has made it essential to address spectrum scarcity problem. In this context, an emerging technology, cognitive radio (CR) has been come out to solve this spectrum scarcity problem. The most important function of cognitive radio is spectrum sensing which requires more accuracy & low complexity. This paper proposes spectrum sensing technique usin...
متن کاملSpectrum Sensing in Cognitive Radio by Statistical Matched Wevelet Method and Matched Filter
Cognitive radio draw lots of research attentions in recent years for its efficient spectrum utilization. In cognitive radio networks, the first cognitive task preceding any form of dynamic spectrum management is the spectrum sensing and identification of spectrum holes in wireless environment. Spectrum Sensing is an important functionality of Cognitive Radio (CR). Accuracy and speed of estimati...
متن کامل