Title :
Detection of speech modulated SSB and AM signals in the HF-band
Author :
Kreuzberger, Jörg ; Reichert, Jürgen ; Quint, Franz
Author_Institution :
SEL Verteidigungssyst. GmbH, Pforzheim, Germany
fDate :
6/21/1905 12:00:00 AM
Abstract :
The automatic detection of the modulation type of communication signals in the HF range between 2 and 30 MHz is extremely difficult due to the signal distortion caused by sky wave propagation. Under time varying and frequency selective fading it´s difficult to determine between stationary digital and nonstationary speech modulated transmissions. In this paper an algorithm is introduced to separate speech modulated single sideband (SSB) and double sideband (AM) broadcasts from all other broadcasts in the HF range. The algorithm extracts a set of features from the analyzed signal and uses a polynomial classifier to classify the signal
Keywords :
HF radio propagation; fading channels; feature extraction; modulation; radio broadcasting; signal classification; signal detection; speech processing; time-varying channels; 2 to 30 MHz; HF-band; algorithm; automatic detection; communication signals; double sideband broadcasts; feature extraction; frequency selective fading; nonstationary speech modulated transmission; polynomial classifier; signal classification; signal distortion; single sideband modulation; sky wave propagation; speech modulated AM signals; speech modulated SSB signals; speech signal detection; stationary digital speech modulated transmission; time varying fading; Algorithm design and analysis; Amplitude modulation; Broadcasting; Digital modulation; Fading; Frequency shift keying; Polynomials; Receivers; Signal analysis; Speech;
Conference_Titel :
Military Communications Conference Proceedings, 1999. MILCOM 1999. IEEE
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-5538-5
DOI :
10.1109/MILCOM.1999.822673
