A new digital modulation recognition technique using the phase detector reliability

International audienceA new feature based digital modulation identification algorithm has been developed and presented in this paper. The algorithm developed uses the reliability of a decision-directed (DD) phase detector as a modulation scheme classification feature. Unlike feature based methods found in literature, the classification decision of the proposed algorithm does not rely on decision thresholds. Simulation results covering 64-QAM, 16-QAM, 16-APSK and 8-PSK modulation schemes show promising identification statistics with high probability of correct classification in the presence of noise even with high order modulation schemes