Invention Grant
- Patent Title: OFDMA baseband clock synchronization
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Application No.: US16425694Application Date: 2019-05-29
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Publication No.: US10944535B2Publication Date: 2021-03-09
- Inventor: Michael Rodriguez , Honghui Xu
- Applicant: Shure Acquisition Holdings, Inc.
- Applicant Address: US IL Niles
- Assignee: Shure Acquisition Holdings, Inc.
- Current Assignee: Shure Acquisition Holdings, Inc.
- Current Assignee Address: US IL Niles
- Agency: Neal, Gerber & Eisenberg LLP
- Main IPC: H04L7/00
- IPC: H04L7/00 ; H04L5/00 ; H04L27/26 ; H04J11/00

Abstract:
A method for synchronizing baseband clocks in an OFDMA wireless microphone system is disclosed. An example method includes receiving a plurality of pilot subcarriers from an audio transmitter. The method also includes determining a timing offset estimate based on the pilot subcarriers. The method further includes determining a tuning value by passing the timing offset estimate through a proportional-integral controller. The method still further includes determining a modified reference signal by modifying a reference oscillator based on the tuning value. And the method yet further includes controlling (i) an audio sample clock and (ii) an antenna data clock based on the modified reference signal.
Public/Granted literature
- US20200382268A1 OFDMA BASEBAND CLOCK SYNCHRONIZATION Public/Granted day:2020-12-03
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