The primary aim is to design a robust and efficient algorithm capable of accurately classifying modulations in communication signals by leveraging PCA-derived features.
Automatic Modulation Classification (AMC) plays an important role in both military and civilian applications. Feature based AMC is used in this paper. Principle Component Analysis (PCA) is employed to reduce dimensions of the feature vector. Two classifiers mainly k-nearest neighbour (KNN) and Support Vector Machine (SVM) are used to investigate the correct classification rate against different SNRs for test signals. Experiments are conducted using data trained at two different SNRs of 15dB and 3dB respectively. Results show that KNN classifier shows better results when data is trained at high SNRs. However, both the classifiers show almost same performance when data is trained at low SNR.
Keywords: Automatic Modulation Classification; Principle Component Analysis; Feature based; classifier; Support Vector Machine; k-Nearest Neighbour
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