This paper designs the circular Gabor filters incorporating into the human visual characteristics, and the concept of
mutual information entropy in rough set is introduced to evaluate the effect of the features extracted from different filters
on clustering, redundant features are got rid of, Experimental results indicate that the proposed algorithm outperforms conventional
approaches in terms of both objective measurements and visual evaluation in texture segmentation.
In this paper, an all-digital demodulation scheme which is compliant with the second generation digital video broadcasting via satellites (DVB-S2) is presented. It works well for several modulation modes supported by DVB-S2 even under rather low signal-to-noise ratio (SNR). All algorithms adopted in this scheme have been described in detail and their computer simulation results have been shown. The symbol error rate (SER) performance from simulations is very close to the theoretical one.
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