Title :
Detection of modem type and bit rate of FSK voiceband and data signals
Author_Institution :
Dept. of Electron., Ancona Univ.
Abstract :
A classification scheme to detect the modem type (e.g., 202, V.23, 103, and V.21) and bit rate (e.g., 1800, 1200, 600, 300, and 75 b/s) of frequency-shift-keyed (FSK) voice band data signals is presented. The discrimination technique is based upon simple second-order statistical parameters of the instantaneous frequency of the input signal. Good performance of the discriminator is obtained even in the presence of various analog impairments for observation windows of 0.25 to 1 s, depending upon the input signal
Keywords :
frequency shift keying; modems; signal detection; 1200 bit/s; 1800 bit/s; 300 bit/s; 600 bit/s; 75 bit/s; FSK voiceband signals; V.21; V.23; analog impairments; bit rate; data signals; discrimination technique; input signal; instantaneous frequency; modem type signals; observation windows; second-order statistical parameters; signal detection; Bit rate; Classification algorithms; Demodulation; Filters; Frequency estimation; Frequency shift keying; Modems; Phase shift keying; Signal processing; Telecommunication traffic;
Conference_Titel :
Communications, 1989. ICC '89, BOSTONICC/89. Conference record. 'World Prosperity Through Communications', IEEE International Conference on
Conference_Location :
Boston, MA
DOI :
10.1109/ICC.1989.49854
