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:
Feb. 05, 2013
Filed:
Mar. 18, 2010
Kazutaka Hara, Yokosuka, JP;
Shunji Kimura, Yokosuka, JP;
Hirotaka Nakamura, Yokosuka, JP;
Koji Kitahara, Yokohama, JP;
Yoshikazu Urabe, Yokohama, JP;
Masahiro Endo, Yokohama, JP;
Kazutaka Hara, Yokosuka, JP;
Shunji Kimura, Yokosuka, JP;
Hirotaka Nakamura, Yokosuka, JP;
Koji Kitahara, Yokohama, JP;
Yoshikazu Urabe, Yokohama, JP;
Masahiro Endo, Yokohama, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
NTT Electronics Corporation, Kanagawa, JP;
Abstract
In the present invention, unlike a conventional circuit, discrimination is not made by integrating a logical code that includes '0' and '1' to some extent and produced from a random code, but repetition of an identical pattern of a well-known preamble signal added to a head portion of a signal is discriminated when a bit-rate of the signal is changed. More specifically, the repetition of the identical pattern is converted into a consecutive identical signal to generate the consecutive identical signal (having a length of tens bits to thousands bits). Although the consecutive identical signal is longer than a same-code continuation length included in the signal, and is shorter than a time constant necessary to the conventional circuit by about one to three digits. Therefore, an integration time can be shortened to the same degree as the generated consecutive identical signal length, and the bit-rate can be discriminated at high speed within a preamble signal receiving time.