The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 2006
Filed:
Nov. 06, 2001
Yoshiro Kokuryo, Tachikawa, JP;
Kunihiko Kondo, Kodaira, JP;
Hiroyuki Ando, Kodaira, JP;
Nobuo Hirose, Hino, JP;
Yoshiro Kokuryo, Tachikawa, JP;
Kunihiko Kondo, Kodaira, JP;
Hiroyuki Ando, Kodaira, JP;
Nobuo Hirose, Hino, JP;
Hitachi Koksusai Electric, Inc., Tokyo, JP;
Abstract
A demodulation method, and apparatus, for reproducing data from a received signal. The demodulation method includes the steps of: receiving a signal including a series of frames each containing a training signal for automatic equalization processing and a data signal; controlling an amplitude of the received signal by AGC processing so as to make the amplitude a predetermined level; conducting demodulation processing on the signal subjected to the AGC processing; periodically conducting automatic equalization processing so as to adapt the modulated signal to characteristics of the signal transmission path based on each training signal of the frame; and setting values of a time constant of the AGC processing and an update repetition period of the automatic equalization processing so as to satisfy a predetermined relation.