Title:
DEMODULATOR FOR PROCESSING DIGITAL SIGNAL
Document Type and Number:
WIPO Patent Application WO/2001/026316
Kind Code:
A1
Abstract:
Serial signals generated by A/D conversion at a rate twice the modulation rate are so subjected to S/P conversion that the data ratio is 1:2 to generate a pair of data signals parallel in modulation rate. For demodulation, the parallel paired data signals are parallel processed, and the demodulation rate is equal to the modulation rate. The serial data generated by A/D conversion at a rate four times the modulation rate is so subjected to S/P conversion that the data ratio is 1:4, and is similarly demodulated at a demodulation rate equal to the modulation rate. Thus, the demodulator for processing a digital signal is applicable to a communication system of high modulation rate.
Inventors:
SASAKI EISAKU (JP)
Application Number:
PCT/JP2000/006925
Publication Date:
April 12, 2001
Filing Date:
October 04, 2000
Export Citation:
Assignee:
NEC CORP (JP)
SASAKI EISAKU (JP)
SASAKI EISAKU (JP)
International Classes:
H03H17/06; H04L27/22; H04L27/227; H04L27/00; (IPC1-7): H04L27/22
Foreign References:
| JPS6284611A | 1987-04-18 | |||
| JPS62293811A | 1987-12-21 | |||
| JPS6075117A | 1985-04-27 | |||
| JPH10229423A | 1998-08-25 | |||
| JPH08139775A | 1996-05-31 | |||
| JPH0983588A | 1997-03-28 |
Other References:
See also references of EP 1137231A4
Attorney, Agent or Firm:
Ikeda, Noriyasu (Tokyo, JP)
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