A modulation classifier for multi-channel systems and multi-transmitter situations

Author

Nagy, Peter A J

Author_Institution

Nat. Defence Res. Establ., Linkoping, Sweden

fYear

1994

fDate

2-5 Oct 1994

Firstpage

816

Abstract

This paper presents a modulation classifier that is designed to handle multi-channel systems and situations where several digitally modulated signals are mixed. This is accomplished by dividing the analyzed signal into individual components. The signal components are located via a smoothed amplitude spectrum and individually classified by a single tone classifier that can handle CW, ASK, BPSK, and QPSK signals. FSK signals can also be handled since they are divided into two peaks, which are separately classified. Each peak in an FSK signal will be an ASK signal. The FSK signal is thus classified as two ASK signals, and by analyzing their correlation it can be established that they form an FSK signal

Keywords

amplitude shift keying; correlation methods; frequency shift keying; phase shift keying; quadrature phase shift keying; radio transmitters; telecommunication channels; ASK signals; BPSK signals; CW signals; FSK signals; HF band; QPSK signals; correlation; digitally modulated signals; modulation classifier; multi-channel systems; multi-transmitter systems; signal components; single tone classifier; smoothed amplitude spectrum; Amplitude shift keying; Bandwidth; Digital modulation; Electromagnetic propagation; Electronic countermeasures; Fading; Frequency shift keying; Monitoring; Signal analysis; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1994. MILCOM '94. Conference Record, 1994 IEEE

Conference_Location

Fort Monmouth, NJ

Print_ISBN

0-7803-1828-5

Type

conf

DOI

10.1109/MILCOM.1994.473858

Filename

473858