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. 08, 1994
Filed:
Jul. 28, 1993
Applicant:
Inventor:
Hiroyasu Muto, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375 94 ; 375 83 ; 36471511 ;
Abstract
A signal vector obtained by synchronous detection of a received signal is sampled by a sampling rate equal to a symbol rate. The sampled signal vector is rotated by a predetermined angle, and a mean value vector is calculated by latest rotated signal vectors of the number corresponding to a length of a particular signal sequence to be detected. Then, a square and summation value between the mean value and the rotated signal vector used for calculating the mean value vector is calculated. When the square and summation value becomes less than a predetermined value, a particular signal sequence is assumed to be detected.