Title:
TIMING REPRODUCING DEVICE, DEMODULATOR USING THE SAME AND TIMING REPRODUCING METHOD
Document Type and Number:
Japanese Patent JP3792098
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To relatively accelerate the peak operating speed of a demodulator as a result by enabling high-accuracy and high-speed timing phase estimating operation almost equal with conventional operation even when the lower limit value of a sampling speed is lowered.
SOLUTION: A/D converting parts 3a and 3b sample a received baseband signal Sb with an asynchronous sampling clock CK of doubled symbol rate and on the basis of these sampled data sequences Ii and Qi, a transmission complex symbol frequency generating part 5 generates data sequences Ei and Di of transmission complex symbol frequency components. A correlative value calculating part 10 outputs a correlative data sequence SMi being the correlative value of a cosine wave data sequence Ci of a symbol frequency generated by a cosine wave generating part 9 on the basis of the asynchronous sampling clock CK and the data sequences Ei and Di. An inverse tangent calculating part 11 outputs a timing error τ on the basis of the correlative data sequence SMi.
Inventors:
Akinori Fujimura
Seiji Okubo
Kojima Spring
Seiji Okubo
Kojima Spring
Application Number:
JP2000076899A
Publication Date:
June 28, 2006
Filing Date:
March 17, 2000
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H04L27/22; H04L7/00; H04L7/02; H04L7/033; (IPC1-7): H04L27/22; H04L7/00
Domestic Patent References:
| JP4057432A |
Attorney, Agent or Firm:
Hiroaki Sakai
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