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In cognitive radio networks (CRNs), wideband spectrum sensing is an important task for secondary users (SUs) to achieve the dynamic spectrum access. Even though the wideband spectrum detection is feasible by combining the compressive sensing (CS) with wavelet transform, however, accurate detection of the small-scale primary users (SSPUs) such as wireless microphones and mobile devices is still difficult...
In cognitive radio networks, secondary users (SUs) need to sense/detect the vacant spectrum holes in a wide frequency band for achieve the dynamic spectrum access. The combination of compressive sensing (CS) with wavelet edge detection makes the wideband spectrum reconstruction and detection to be feasible. The existence of small-scale primary users (SSPUs) such as wireless microphones and mobile...
To improve the spectrum utilization efficiency, secondary users (SUs) in cognitive wireless networks should be able to not only detect the spectral holes in time and frequency domains, but also exploit the spatial spectrum opportunities for dynamic spectrum access. In this paper, accurate and robust tracking of mobile-primary user is formulated as a Bayesian filtering problem with the shadow-fading...
For wideband cognitive radio networks, small-scale primary users (SSPUs) such as wireless microphones and mobile devices are generally difficult to be accurately sensed/detected due to the use of weak transmit power and noise uncertainty. Recently, compressive sensing (CS) technologies and edge detection methods (such as wavelet transform) are widely researched and combined to achieve the effective...
A novel robust detection algorithm based on goodness-of-fit test is proposed to achieve spectrum sensing for the small-scale primary users (SSPUs) including wireless microphones and mobile devices. In the proposed algorithm, a new test statistic is proposed to measure the non-Gaussianity of the power spectral density (PSD) of the received signals. Since the estimated PSD of the ambient Gauss noise...
In this paper, an information theoretic criteria (ITC) based spectrum sensing method is proposed to detect the multi-primary users in cognitive radio network. Based on the theory of array signal processing, a new frequency-domain channel model of spectrum sensing is presented with multiple antennas. Then, a novel ITC-based spectrum sensing algorithm is proposed, which can blindly detect multi-primary...
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