Frequency shift compensation, such as for use in a wireless...

Details Frequency shift compensation, such as for use in a wireless... Frequency shift compensation, such as for use in a wireless...

2011-08-09

2011-08-09

Wong, Albert K (Department: 2612)

Communications: electrical

Continuously variable indicating

With meter reading

C340S870030, C455S039000, C455S500000, C455S063100

Reexamination Certificate

active

07994933

ABSTRACT:
Methods and apparatus for computing the carrier frequency of a transmitter using frequency modulated digital data to compensate for frequency shifting of the transmitter and the receiver local oscillators and for bandwidth adjustment of the receiver's filter. In particular, methods and apparatus are disclosed for binary systems transmitting “1” and “0” data using decoded or undecoded received signals.

REFERENCES:
patent: 5128625 (1992-07-01), Yatsuzuka et al.
patent: 5673252 (1997-09-01), Johnson et al.
patent: 6556621 (2003-04-01), Richards et al.
patent: 6965585 (2005-11-01), Grilli et al.
patent: 7079610 (2006-07-01), Johansson et al.
Samadian, S. et al., “Demodulators for a Zero-IF Bluetooth Receiver,” IEEE Journal of Solid-State Circuits, vol. 38, No. 8, Aug. 2003, pp. 1393-1396.
Sevenhans, J. et al., “Trends in Silicon Radio Large Scale Integration: Zero IF Receiver! Zero I & Q Transmitter! Zero Discrete Passives!” IEEE Communications Magazine, Jan. 2000, pp. 142-147.

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