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:
Feb. 28, 2023
Filed:
Sep. 30, 2021
Fujitsu Limited, Kawasaki, JP;
Junichi Sugiyama, Kawasaki, JP;
Yuji Ikegami, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A communication quality estimating device estimates an error rate of a signal with FEC capable of correcting K errors. The device obtains a frequency measurement value that indicates a frequency at which a codeword including m errors is received. The device determines a transition probability and a continuation probability included in each of a plurality of formulae, such that a frequency calculation value that is calculated using the plurality of formulae and indicates a frequency at which a codeword including m errors is received is brought close to the frequency measurement value. The device calculates a frequency at which a codeword including more than K errors is received, by using the plurality of formulae each with the determined transition probability and the determined continuation probability. The device estimates after-FEC error rate based on a result of the calculation.