Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent
1998-01-15
2000-08-22
Ton, Dang
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
370208, H04J 306
Patent
active
061083534
ABSTRACT:
A demodulating apparatus according for demodulating a modulated signal obtained by modulating a plurality of carriers having different frequencies, includes a data demodulating circuit for demodulating data by frequency-analyzing a time waveform of the modulated signal which is formed of a data period of one modulation time and a guard interval succeeding the data period and which includes in the data period a period having correlation with the guard interval and provided at a position away from the modulated signal by the one modulation time, a correlation circuit for detecting correlation between the guard interval of the modulated signal and the period in the data period having correlation with the guard interval and provided at a position away from the modulated signal by the one modulation time, and a synchronization signal generating circuit including the correlation circuit and for generating a synchronization signal based on a detection output from the correlation circuit. The correlation is detected in a predetermined period which is 1/2 as long as each of the guard interval and the period having correlation with the guard interval and in which correlation can substantially be detected. Therefore, it is possible to shorten a time for generating the synchronization signal.
REFERENCES:
patent: 5602835 (1997-02-01), Seki et al.
patent: 5694389 (1997-12-01), Seki et al.
patent: 5774450 (1998-06-01), Harada et al.
patent: 5787123 (1998-07-01), Okada et al.
patent: 5818813 (1998-10-01), Saito et al.
Nakamura Jin
Nomura Kiyoshi
Tsuruoka Tatsuya
Maioli Jay H.
Sam Phirin
Sony Corporation
Ton Dang
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