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Automatic modulation recognition is extremely important for the receiver design in the broadband multimedia communication system. Based on the intrinsic time-scale decomposition algorithm for feature extraction on which the instantaneous amplitude, phase and frequency is precisely defined, this paper proposed a feature selection algorithm to find the features with high distinguishing capacity and a digital modulation recognition algorithm. Simulation results show that this algorithm is of low complexity and the average recognition accuracy is higher than 94% using only three feature parameters when SNR is above 5dB.
Date of Conference: 24-26 March 2010