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:
Mar. 31, 2020
Filed:
May. 26, 2017
Ntt Electronics Corporation, Yokohama-shi, Kanagawa, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Tomohiro Takamuku, Kanagawa, JP;
Etsushi Yamazaki, Kanagawa, JP;
Katsuichi Oyama, Kanagawa, JP;
Yasuharu Onuma, Kanagawa, JP;
Kazuhito Takei, Kanagawa, JP;
Masanori Nakamura, Kanagawa, JP;
Mitsuteru Yoshida, Kanagawa, JP;
Masahito Tomizawa, Kanagawa, JP;
Yoshiaki Kisaka, Kanagawa, JP;
NTT ELECTRONICS CORPORATION, Yokohama-shi, Kanagawa, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
A reception circuit includes a first adaptive compensator compensating distortion of a received signal. An adaptive compensation coefficient calculator includes a known-signal detector detecting first and second known-signals from the received signal, a second adaptive compensator compensating distortion of the received signal, a tap coefficient initial value calculator calculating an initial value of a tap coefficient of the second adaptive compensator by comparing the first known-signal with its true value, a first phase shift compensator compensating phase shift of an output of the second adaptive compensator using the second known-signal, and a tap coefficient calculator calculating tap coefficients of the first and second adaptive compensators by comparing at least one of the first and second known-signals compensated by the second adaptive compensator and the first phase shift compensator with its true value.