Study on Spectrum Sensing Techniques
نویسندگان
چکیده
منابع مشابه
A Review on: Spectrum Sensing Techniques
Spectrum sensing is an important and sensitive task in cognitive radio since interfering with other users is illegal. One of the main requirements of spectrum sensing is to detect the presence of the primary users as fast as possible. Cognitive radio arises to be a tempting solution to spectral crowding problem by introducing the opportunistic usage of frequency bands that are not occupied by l...
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Spectrum Sensing is an important functionality of Cognitive Radio (CR). Accuracy and speed of estimation are the key indicators to select the appropriate spectrum sensing technique. Conventional spectrum estimation techniques which are based on Short Time Fourier Transform (STFT) suffer from familiar problems such as low frequency resolution, high variance of estimated power spectrum and high s...
متن کاملStudy Of Spectrum Sensing Techniques For OFDM Based Cognitive Radio
Nowadays OFDM (Orthogonal Frequency Division Multiplexing) techniques are adopted by many existing or progressing wireless communication standards.OFDM’s sensing and spectrum shaping capabilities together with its flexibility and adaptivity make it the best transmission technology for CR system. Spectrum sensing helps to detect the spectrum holes (unutilized bands of the spectrum) providing hig...
متن کاملCentralized Spectrum Sensing Using New Algorithmic Techniques
Spectrum sensing is the basic step in cognitive radio networks. Its accuracy directly affects spectrum utilization. In this paper we propose a new method for blind cooperative spectrum sensing using spatial information. We model our sensing matrix as a graph, taking advantage of signal and spatial correlation of antennas. We prove that the general settings of the problem are hard to approximate...
متن کاملSpectrum Sensing Techniques : Research , Challenge and Limitations
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...
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ژورنال
عنوان ژورنال: HELIX
سال: 2019
ISSN: 2277-3495,2319-5592
DOI: 10.29042/2019-5046-5051