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. 18, 2014
Filed:
Sep. 29, 2006
Applicant:
Eisaku Sasaki, Tokyo, JP;
Inventor:
Eisaku Sasaki, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04L 27/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
A log likelihood ratio arithmetic circuit for calculating a log likelihood ratio from information of a coordinate of a reception signal point to be applied to a communication system using a quadrature amplitude modulation method, wherein the circuit limits a scope within which a value of the log likelihood ratio varies corresponding to a position of the reception signal point to a range between adjacent signal points including a hard-decision threshold of a bit, and wherein the value of the log likelihood ratio does not vary outside of the range between the adjacent signal points.