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Detection of wideband communication signals is critical for cognitive radio (CR) as it enables secondary users to dynamically access the unoccupied bands. However, accurate and fast spectrum sensing is still a challenge in low signal to noise ratio (SNR) environment. To encounter this problem, a feature detector based on compressed sensing (CS) and wavelet transform (WT) (CS-WT feature detector) is...
By analyzing the relationship between the camera motion and the coarseness changing of the texture image, a vision servoing method based on texture coarseness analyzing is given in this paper. The theory based on geography feature calculation is not effective in the environment full of texture but short of geography features. Texture feature extraction corresponding to the camera translation, pitching...
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