Patent · US Active

Estimation of frequency offset between a base station and mobile terminal

US9014314B2 · kind B2 · utility

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16Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Guoqiang Lu · Latham, US
Oskar Mauritz · Stockholm, SE
Fredrik Huss · Sundbyberg, SE
Henrik Back · Handen, SE

Key dates

Filing date	Nov 8, 2013
Grant date	Apr 21, 2015
Priority date	—
Expiry date	Nov 8, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04J2011/0096
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method and apparatus for frequency offset estimation exploits the differences in reference symbol timing for different channels to resolve ambiguities in the frequency offset estimation. Based on the initial frequency offset estimates, a hypothesis table is constructed providing hypothesized frequency offsets for each channel for a plurality of possible offset regions. An error metric for each offset region is calculated based on the difference of the hypothesized frequency offsets. The set of hypothesized frequency offsets that minimize the error metric is selected as the final frequency offset estimates.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.