Title:
DIGITAL BROADCAST RECEIVING METHOD
Document Type and Number:
Japanese Patent JP3447823
Kind Code:
B2
Abstract:
PURPOSE: To accurately demodulate data by correcting the frequency shift between a transmission local frequency and a reception local frequency.
CONSTITUTION: A frequency control signal generation part 64 outputs a signal corresponding to the difference between the transmission local frequency and reception local frequency by using the output data of a Fourier transformation part 61, and controls the oscillation frequency of a VCO 54a, i.e., reception local frequency on the basis of the difference signal. In this case, when the frequency shift is large, a P correction signal part 71 outputs a correction signal to decrease the frequency shift and after the frequency shift becomes small, a ΔP correction signal generation part 72 corrects the reception local frequency so that the frequency shift becomes zero.
Inventors:
Yoshihisa Tsuji
Takeshi Kato
Takeshi Kato
Application Number:
JP27811894A
Publication Date:
September 16, 2003
Filing Date:
November 11, 1994
Export Citation:
Assignee:
Alpine Co., Ltd.
International Classes:
H04L27/22; H04J11/00; (IPC1-7): H04L27/22; H04J11/00
Domestic Patent References:
| JP6188776A | ||||
| JP5344172A | ||||
| JP5236042A | ||||
| JP6052146A | ||||
| JP6501357A | ||||
| JP10508158A |
Attorney, Agent or Firm:
Chimiki Saito