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:
Sep. 14, 2021
Filed:
Jul. 22, 2019
Ntt Electronics Corporation, Yokohama, JP;
Tomohiro Takamuku, Kanagawa, JP;
Mitsuteru Yoshida, Kanagawa, JP;
Tsutomu Takeya, Kanagawa, JP;
Katsuichi Oyama, Kanagawa, JP;
Hiroyuki Nouchi, Kanagawa, JP;
Atsushi Suenaga, Kanagawa, JP;
NTT ELECTRONICS CORPORATION, Yokohama, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
A known pattern comparison type phase difference detection unit () detects a phase difference between a known pattern extracted from a received signal and a true value of the known pattern as a first phase difference. M indicates the number of modulation phases in a phase modulation method of the received signal. An M-th power type phase difference detection unit () removes a modulation component by raising the received signal to M-th power, and detects phase variation from a modulation phase point used for mapping on a transmission side, as a second phase difference. A phase compensation unit () compensates phase variation of the received signal based on an addition result of the first phase difference and the second phase difference.