Invention Grant
- Patent Title: Frequency synchronization for a near field communication (NFC) device
- Patent Title (中): 近场通信(NFC)设备的频率同步
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Application No.: US14920990Application Date: 2015-10-23
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Publication No.: US09559833B1Publication Date: 2017-01-31
- Inventor: Shengyang Xu , Dong-U Lee
- Applicant: Broadcom Corporation
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Sterne, Kessler, Goldstein & Fox PLLC
- Main IPC: H03D3/24
- IPC: H03D3/24 ; H04L7/00 ; H04W4/00 ; H04W56/00

Abstract:
A first near field communication (NFC) device is disclosed that synchronizes a first carrier wave of the first NFC device to a second carrier wave of a second NFC device. The first NFC device observes a magnetic field having the first carrier wave modulated with information corresponding to the first NFC device and the second carrier wave modulated with information corresponding to the second NFC device. The first NFC device isolates the information corresponding to the second NFC device from the combined sequence of information to determine a frequency error and/or a phase error between the carrier waves. Finally, the first NFC device adjusts the frequency of the first carrier wave in accordance with the first frequency error and/or the phase of the first carrier wave in accordance with the first phase error to synchronize the carrier waves.
Information query
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