Invention Grant
- Patent Title: Estimation of frequency offset between a base station and mobile terminal
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Application No.: US13170930Application Date: 2011-06-28
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Publication No.: US08605799B2Publication Date: 2013-12-10
- Inventor: Guoqiang Lu , Oskar Mauritz , Fredrik Huss , Henrik Back
- Applicant: Guoqiang Lu , Oskar Mauritz , Fredrik Huss , Henrik Back
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget L M Ericsson (Publ)
- Current Assignee: Telefonaktiebolaget L M Ericsson (Publ)
- Current Assignee Address: SE Stockholm
- Agency: Coats and Bennett, P.L.L.C.
- Main IPC: H04L25/00
- IPC: H04L25/00 ; H04L7/00

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.
Public/Granted literature
- US20130003880A1 Estimation of Frequency Offset Between a Base Station and Mobile Terminal Public/Granted day:2013-01-03
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