Invention Grant
US08112034B2 Method and system for using PSK sync word for fine tuning frequency adjustment
有权
使用PSK同步字进行微调频率调整的方法和系统
- Patent Title: Method and system for using PSK sync word for fine tuning frequency adjustment
- Patent Title (中): 使用PSK同步字进行微调频率调整的方法和系统
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Application No.: US12052214Application Date: 2008-03-20
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Publication No.: US08112034B2Publication Date: 2012-02-07
- Inventor: Brima Ibrahim , Hea Joung Kim , Henrik Tholstrup Jensen , Siukai Mak
- Applicant: Brima Ibrahim , Hea Joung Kim , Henrik Tholstrup Jensen , Siukai Mak
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Thomas, Kayden, Horstemeyer & Risley, LLP.
- Main IPC: H04B7/00
- IPC: H04B7/00

Abstract:
In RF transceivers, a method and system for using phase shift key (PSK) sync word for fine tuning frequency adjustment are provided. One aspect of the invention provides for adjusting a local oscillator frequency in a radio frequency (RF) receiver when a residual DC offset remains after a coarse frequency offset adjustment if performed. The fine adjustment may be necessary because of the synchronization required with a PSK-based modulated portion of a Bluetooth packet. A residual phase shift detected in a sync sequence portion of the Bluetooth packet may be utilized to determine a residual or fine frequency adjustment. This approach may allow an RF receiver to operate, in some instances, without the need for an equalizer. In this regard, the power consumed by the RF receiver may be minimized and/or the overall cost of the RF receiver may be reduced.
Public/Granted literature
- US20080214112A1 Method and System for Using PSK Sync Word for Fine Tuning Frequency Adjustment Public/Granted day:2008-09-04
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