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. 22, 2017
Filed:
Mar. 20, 2017
Applicant:
Hitachi Kokusai Electric Inc., Tokyo, JP;
Inventor:
Kei Ito, Tokyo, JP;
Assignee:
Hitachi Kokusai Electric, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 7/30 (2006.01); H04L 25/03 (2006.01); H04L 1/00 (2006.01); H04L 5/00 (2006.01);
U.S. Cl.
CPC ...
H04L 25/03019 (2013.01); H04L 1/0071 (2013.01); H04L 5/0007 (2013.01); H04L 25/03171 (2013.01); H04L 2025/03414 (2013.01);
Abstract
When a channel between a transmission apparatus and a reception apparatus is distorted by multipath fading or other reasons, linear interpolation between pilot subcarriers produces a large estimation error, resulting in an increase in an equalization error and a decrease in reception performance. The present invention allows feedback of a signal that undergoes error correction, reduction in the channel estimation error through repeated channel estimation, and improvement in the reception performance.