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Compared with super-heterodyne architecture, one of the advantages of the low-IF receiver is that the image rejection is realized by I/Q signal processing instead of a fixed analog filter, making it highly integration, flexibility and cost-efficient. However, unavoidable imbalances between the I-branch and Q-branch lead to insufficient image attenuation which must be enhanced by using additional analog...
The traditional methods of image edge detection are sensitive to the noise comparatively and can not locate the edge exactly. Aiming at the shortage of the traditional methods of image edge detection, the paper puts forward the edge detection of the low signal noise ratio image (the low SNR image) according to the local feature. Firstly, we analyze the relationship of the neighborhood of pixels and...
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