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. 25, 2014
Filed:
Mar. 06, 2009
Ulf Lindgren, Vastra Frolunda, SE;
Henrik Sahlin, Molnlycke, SE;
Ulf Lindgren, Vastra Frolunda, SE;
Henrik Sahlin, Molnlycke, SE;
Telefonaktiebolaget L M Ericsson (publ), Stockholm, SE;
Abstract
For compensating carrier frequency generation in communication equipment for radio transmission in an Orthogonal Frequency Division Multiplex, OFDM, based wireless radio communication system, in which reference signals known communication equipment are transmitted in a regular time repetitive manner, carrier frequency generation is compensated () by a calculated carrier frequency offset estimate. The carrier frequency offset estimate in the communication equipment is calculated from coarse () and fine carrier frequency offset estimates (). The coarse carrier frequency offset estimate () is calculated in the frequency domain from reference symbols of a reference signal received () at the communication equipment and the fine carrier frequency offset estimate () is calculated in the time domain from reference symbols of reference signals repetitively received () at said communication equipment. An algorithm and an estimator module () for calculating a coarse carrier frequency offset are provided.