Automatic modulation recognition—I

In this paper, a review of the more recent papers published in the area of modulation recognition is introduced. Three alternative algorithms, representing modifications of earlier works and based on the decision-theoretic approach, are presented. These appear to offer the best performance over a large number of modulation types. For example, the average analogue modulations recognition success rate is ≈99% at 10 dB SNR, the average digital modulations recognition success rate is ≈99% at the SNR of 10 dB, and the average analogue and digital modulations recognition success rate is ≈93% at 15 dB SNR.