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:
Aug. 04, 2015
Filed:
Nov. 04, 2014
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Masataka Umeda, Yokohama, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A likelihood weighting circuit includes a weighting part assigning a weight to a first soft-decision likelihood for a subcarrier in a received signal based on a power value of the received signal or a modulation error ratio of the subcarrier, a first variance calculator calculating a variance of the power value, a second variance calculator calculating a variance of the modulation error ratio, a likelihood measurement part measuring a distribution of a second soft-decision likelihood obtained by assigning the weight to the first soft-decision likelihood, a controller computing a first relaxing level of the power value and a second relaxing level of the modulation error ratio based on the respective variances, and a value of the second soft-decision likelihood, a first normalization processor normalizing the power value based on the first relaxing level, and a second normalization processor normalizing the modulation error ratio based on the second relaxing level.