Title :
Estimation of mistuned frequency from received voice signal in suppressed carrier SSB
Author :
Suzuki, Jouji ; Shimamura, Tetsuya ; Yashima, Hiroyuki
Author_Institution :
Fac. of Eng., Saitama Univ., Urawa, Japan
fDate :
28 Nov- 2 Dec 1994
Abstract :
In order to get distortion free speech at suppressed carrier SSB (SCSSB), a receiver should tune to the carrier frequency accurately. Manual tuning is very difficult due to the lack of carrier component. If fine tuning has failed at reception, harmonic structure of demodulated voiced sound is lost. A fundamental frequency Fo, however, can be calculated from the cepstrum of received speech even if the voiced spectrum is shifted. Difference between the carrier frequency and the receiving frequency, is estimated from peaks on the spectrum of received speech, which correspond to harmonics of Fo. Simulation of the proposed method shows that the difference frequency is estimated of accuracy within 4 Hz. This method will contribute to AFC of SCSSB
Keywords :
automatic frequency control; cepstral analysis; demodulation; frequency estimation; modulation; radio receivers; voice communication; AFC; carrier frequency; cepstrum; demodulated voiced sound; distortion free speech; fine tuning; fundamental frequency; harmonic structure; manual tuning; mistuned frequency estimation; received voice signal; receiving frequency; simulation; suppressed carrier SSB; Amplitude modulation; Automatic frequency control; Cepstrum; Distortion; Envelope detectors; Frequency estimation; Frequency measurement; Signal detection; Speech analysis; Tuning;
Conference_Titel :
Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1820-X
DOI :
10.1109/GLOCOM.1994.512817