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:
Jul. 08, 2014
Filed:
Jun. 04, 2010
Ping LI, Guangdong Province, CN;
Zhaohua Zeng, Guangdong Province, CN;
Hongfeng Qin, Guangdong Province, CN;
Weiju Sun, Guangdong Province, CN;
Lujia Han, Guangdong Province, CN;
Jie Lei, Guangdong Province, CN;
Ping Li, Guangdong Province, CN;
Zhaohua Zeng, Guangdong Province, CN;
Hongfeng Qin, Guangdong Province, CN;
Weiju Sun, Guangdong Province, CN;
Lujia Han, Guangdong Province, CN;
Jie Lei, Guangdong Province, CN;
ZTE Corporation, Shenzhen, Guangdong Province, CN;
Abstract
A frequency offset estimation and correction method in an orthogonal frequency division multiplexing (OFDM) system is disclosed in present invention, including: obtaining a pilot frequency domain channel estimation value of a target user, and smoothing the channel estimation value in frequency domain; obtaining the link quality state of a receiver; adopting a history smoothing algorithm or a multi-branch attempt algorithm to perform frequency offset estimation and frequency offset compensation, performing frequency domain demodulation for the data for which frequency offset compensation has been performed, and outputting a link quality state parameter; and updating the link quality state of the receiver according to the link quality state parameter, determining the output value of this frequency offset estimation and outputting a history frequency offset value required by next frequency offset estimation according to the determined output value of this frequency offset estimation. A corresponding apparatus is also disclosed in the present invention.