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This paper proposed a FRFT-based incoherent demodulation technique for Chirp spread spectrum communication systems which are accepted as a member of IEEE802.15.4a. Then the paper studied the principle and the performance of the FRFT demodulation technique. According to the AWGN channel and the S-V channel defined by IEEE802.15.4a, the BER of the FRFT(More)
Vascular diseases cause a wide range of severe health problems. Vessel images are often corrupted by intensity inhomogeneity and blurry boundary, which makes it difficult to segment vessel image to identify vascular lesions. Integrating the fuzzy decision and a special local energy functional, in this paper, a robust active contour model is proposed to(More)
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