Method and system for frequency feedback adjustment in...

Details Method and system for frequency feedback adjustment in... Method and system for frequency feedback adjustment in...

2005-04-08

2009-10-06

Mehrpour, Melody (Department: 2617)

Telecommunications

Transmitter and receiver at separate stations

Short range rf communication

C455S067110

Reexamination Certificate

active

07599662

ABSTRACT:
In RF transceivers, a method and a system for a frequency feedback adjustment in digital receivers are provided. A DC offset may result from the difference in frequencies between an RF transmitter and an RF receiver. An adjustment of the receiver's frequency may be implemented after synchronization occurs and may be performed by utilizing the Forward Error Correction (FEC) repetition rate in a header of a Bluetooth packet. The adjustment may be performed when the frequency difference exceeds a threshold value. In another aspect, adjusting the frequency of the RF receiver may be performed by modifying and/or changing a phase locked loop (PLL) trimmer register. 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.

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Bluetooth, “Specification of the Bluetooth System, Core System Package, (Controller Volume)”, Version 1.2, Nov. 5, 2003, Specification vol. 2, pp. 97-132.

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