[PDF] Top 20 An Adaptive and Efficient Local Spectrum Sensing Scheme in Cognitive Radio Networks

... of radio spectrum which is limited as a result one of the major issues faced in wireless communication technology is spectrum ...scarcity. Cognitive radio (CR) solves the problem of ... See full document

... available radio spectrum is not used efficiently, therefore a new technology called Cognitive Radio (CR) is used to increase the spectrum ...available spectrum efficiently ... See full document

... the sensing time/period constitutes another approach that can be adopted for enhancing the energy efficiency of ...individual sensing systems. An adaptive sensing period based on the past ... See full document

... a cognitive radio can be defined as ”A radio or system that senses its operational electromagnetic environment and can dynamically and autonomously adjust its radio operating parameters to ... See full document

... An adaptive threshold MH-CBSS algorithm has been proposed which allows the CR dynamically adjusts its energy threshold to attain the minimal total cluster ... See full document

... optimal sensing results with minimum sensing time if PU waveform is ...reliable sensing results with minimum sensing time. Many improved local sens- ing schemes are proposed in [5–12], ... See full document

... COGNITIVE RADIO (CR) enables dynamic spectrum access (DSA) and opportunistic transmission of the secondary user (SU) in authorized primary frequency bands, which is of great promise to promote the ... See full document

... a cognitive radio has a good line of sight to a receiving radio, however, may not be able to locate a second transmitting radio also in the locality of the receiving radio due to ... See full document

... Abstract—Spectrum sensing is the key constituent in cognitive radio (CR) networks for detecting the primary ...of sensing channel such as multipath fading and shadowing, ... See full document

... SU networks while avoiding the interference to PU ...wireless networks, because from the green perspective, spectrum is a natural resource which should not be wasted but be ... See full document

... on spectrum sharing in CR networks has mainly focused on how to efficiently allocate either spectrum or power among CR users subject to interference ...of spectrum management are discussed: ... See full document

... and spectrum efficiency at the same time, authors devised a multi-objective resource allocation ...CR networks to study spectral and energy ...CR networks that shares spectrum with indoor ... See full document

... Cognitive radio (CR) is widely recognized as a novel approach to improve the spectrum ...the spectrum continuously to avoid the interference to primary user (PU), thus the throughput of the ... See full document

... Cooperative spectrum sensing (CSS) can improve the spectrum sensing performance by introducing spatial diversity in cognitive radio networks ...reporting sensing ... See full document

... of cognitive radio (CR) is dependable for detection of vacant frequency ...a sensing functionality into each individual secondary user (SU), we take advantage of a dedicated sensor networks ... See full document

... Spectrum sensing: detection time, frequency, space on the available spectrum, to determine the present can be used for transmitting and receiving channel, through the local spectrum ... See full document

... opportunistic spectrum access (OSA) [8] is discussed ...more efficient, but suboptimal, two-step look-ahead strategy for each ...accessing scheme [9] for multi-hop cognitive ... See full document

... In some applications we do not need to know the exact peak amplitudes and locations, rather we need to know the number or general location of peaks, in this case we use an absolute threshold function. The absolute ... See full document

... the sensing performance under the noise uncertainty environment. An adaptive threshold method is adopted that performs well under the low SNR ...proposed Adaptive Threshold ... See full document

... To improve the existing techniques, one-order cyclos- tationary detection in the time domain is proposed in [15], where the mean characteristic of the PU signal is exploited in order to improve the efficiency of channel ... See full document