Cyclostationarity-based blind classification of joint analog and digital modulations
Dobre,Octavia
Memorial University of Newfoundland
Su,Wei
RDECOM, New Jersey
Bar-Ness,Yeheskel
New Jersey Institute of Technology
Abdi,Ali
New Jersey Institute of Technology
Blind modulation classification (MC) is a major task of an intelligent receiver, being an intermediate step between signal detection and demodulation. MC is a challenging task, especially in a non-cooperative environment, as no prior information on the incoming signal is available at the receive-side. Classification of analog and digital modulations is tackled in this paper. A cyclostationarity-based binary decision tree classifier is proposed to identify amplitude modulation (AM), double side-band (DSB), single side-band (SSB), M-ary phase shift keying (PSK) and quadrature modulation (QAM) signals. The proposed algorithm does not require estimation of the carrier phase, frequency offset, noise and signal powers, and timing synchronization, and provides a probability of correct classification of one in additive Gaussian noise, for signal-to-noise ratios (SNRs) as low as 5dB. The theoretical developments and effectiveness of the classifier are confirmed through simulations.
Octavia A. Dobre received the M. Sc. and Ph. D. degrees in Electrical Engineering from “Politehnica” University of Bucharest (PUB), Romania, in 1991 and 1998, respectively. Between 1998 and 2001 she has been an Assistant Professor at the Department of Remote Control and Electronics in Transports, PUB. In 2000 and 2001 she was the recipient of British Royal Society and Fulbright fellowships, respectively. In 2002 she joined the Department of Electrical and Computer Engineering, at the New Jersey Institute of Technology, as a Research Associate. Currently she is an Assistant Professor with the Faculty of Engineering and Applied Science, Memorial University of Newfoundland. Her current research interests include automatic modulation classification, ARQ for wireless communications, simulation of communication systems, statistical signal processing for communications, multicarrier modulation techniques, and multiple antenna systems.