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Spectrum sensing is a key technique in the cognitive radio. It enables secondary users to detect spectrum holes and monitor primary users' activity. However, many factors make spectrum sensing much difficult, such as very low signal-to-noise ratio, and noise uncertainty, and quite short sensing time, etc. In this paper, a uniform linear array is configured for each secondary user's receiver. The sample...
QR decomposition with M-algorithm (QRD-M) is a breadth-first tree search algorithm, which has been proposed to provide near Maximum likelihood (ML) detection performance with lower computation complexity in Multiple-Input Multiple-Output (MIMO) system. To accomplish near-ML detection performance in QRD-M detection, M should be set at a large value, and the increasing of parameter M will lead to the...
In this paper, a new method is presented for DOA estimation of a number of uncorrelated and coherent signals simultaneously impinging on the far field of a uniform linear array (ULA). In the proposed method, the uncorrelated sources are firstly estimated by MUSIC, and then they are eliminated by the spatial dirrerencing technique, finally, the coherent signals are estimated by using ESPRIT based on...
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