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:
Nov. 14, 2000
Filed:
Aug. 27, 1997
Applicant:
Inventor:
Noriyuki Fujita, Saitama, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455137 ; 455273 ; 375347 ;
Abstract
Detection outputs 103 and 104 of phase-detection sections 9 and 19 of two reception circuits are input to phase difference detection sections 10 and 20, respectively. A detection output 103 indicating an instantaneous phase amount of each symbol as each phase output of a QPSK received signal is converted into phase difference detection outputs 105 and 106 each indicating a difference between the respective symbols. The output is input to a combination process section 23 where amplitude signals 101 and 102 are operated as weighting factors and vector combination so as to obtain a combination signal.