Invention Grant
- Patent Title: System and method for frequency synchronization of Doppler-shifted subcarriers
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Application No.: US16668218Application Date: 2019-10-30
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Publication No.: US10944612B2Publication Date: 2021-03-09
- Inventor: Hanwu Hu , Nima Ahmadvand
- Applicant: Conversant Intellectual Property Management Inc.
- Applicant Address: CA Ottawa
- Assignee: Conversant Intellectual Property Management Inc.
- Current Assignee: Conversant Intellectual Property Management Inc.
- Current Assignee Address: CA Ottawa
- Agency: Conversant IP Management Corp.
- Main IPC: H04L27/26
- IPC: H04L27/26

Abstract:
A method includes receiving an Orthogonal Frequency Division Multiplexing (OFDM) signal comprising a plurality of Doppler-shifted OFDM subcarriers and determining frequency-shift data corresponding to the plurality of Doppler-shifted OFDM subcarriers. The determining includes calculating frequency-shift data for each Doppler-shifted OFDM subcarrier of the plurality of Doppler-shifted OFDM subcarriers, thereby yielding a plurality of subcarrier-specific frequency-shift values and calculating an average of the plurality of subcarrier-specific frequency-shift values. The method further includes frequency shifting each subcarrier of the plurality of Doppler-shifted OFDM subcarriers by a value based on the determined frequency-shift data multiplied by a frequency index of each subcarrier.
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