MATLAB Source Code for Modulation Recognition Using Higher-Order Cumulants

This MATLAB source code implements modulation recognition using higher-order cumulants. The algorithm can identify common modulation schemes including 2ASK, 2PSK, 2FSK, 4ASK, 4PSK, and 4FSK signals with high accuracy. The core implementation involves computing higher-order cumulant features from input signals and using statistical pattern recognition for classification. The algorithm employs the principle of higher-order cumulants, where key features like fourth-order cumulants (kurtosis) are calculated and compared against threshold values or pattern templates to determine the modulation type. The code typically includes functions for signal preprocessing, cumulant calculation using MATLAB's signal processing toolbox, and decision logic based on feature comparisons. In practical applications, this algorithm can be widely used in communication systems for signal identification and demodulation. The implementation allows for accurate recognition and decoding of various common modulation schemes, thereby improving communication system performance and reliability. The MATLAB code structure includes modular functions for feature extraction, classification decision-making, and performance evaluation metrics.