Pulse or digital communications – Receivers – Angle modulation
Patent
1996-10-25
1998-07-28
Ghebretinsae, Temesghen
Pulse or digital communications
Receivers
Angle modulation
375326, 370203, 370210, H04L 2714, H04J 1100
Patent
active
057871230
ABSTRACT:
In view of regenerating clock with higher accuracy even under the condition that frequency distortion is generated due to the frequency selective Rayleigh fading, the OFDM (Orthogonal Frequency Division Multiplexing) modulated signal is converted to the baseband OFDM signal in the multipliers and a phase difference between the phase of the carrier forming the OFDM signal and the phase of the carrier before one OFDM symbol is calculated in the differential decoding circuit. A phase error of the carrier is calculated on the basis of the phase difference of the carrier in the carrier regenerating circuit or clock regenerating circuit and the local oscillator to generate the carrier and the local oscillator to generate clock are respectively controlled on the basis of the phase error of a plurality of carriers among those forming the OFDM signal.
REFERENCES:
patent: 5471464 (1995-11-01), Ikeda
patent: 5602835 (1997-02-01), Seki et al.
patent: 5608764 (1997-03-01), Sugital et al.
Ikeda Tamotsu
Ikeda Yasunari
Okada Takahiro
Frommer William S.
Ghebretinsae Temesghen
Sony Corporation
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