Apparatus and method for sampling frequency offset...

Details Apparatus and method for sampling frequency offset... Apparatus and method for sampling frequency offset...

2007-02-13

2007-02-13

Pham, Brenda (Department: 2616)

Pulse or digital communications

Receivers

Angle modulation

C370S208000

Reexamination Certificate

active

11312510

ABSTRACT:
A method is described for correcting sampling frequency offset (SFO) of a data packet in a communications system where carrier frequency (fc) and sampling frequency (fs) are driven by a common clock source. The method comprises, for each lthsymbol in the data packet, estimating carrier frequency offset (CFO) in a received data packet. From the CFO estimate, an SFO estimate is derived, wherein the SFO is approximately equal to fsmultiplied by said CFO estimate, and divided by fc. An SFO phase correction is generated according to the SFO estimate for each kthtone in a data stream. The SFO phase correction is then applied to each received data stream.

REFERENCES:
patent: 5732113 (1998-03-01), Schmidl et al.
patent: 6522703 (2003-02-01), Cueff et al.
patent: 6567480 (2003-05-01), Brardjanian et al.
patent: 6738375 (2004-05-01), Okanoue
patent: 2004/0131012 (2004-07-01), Mody et al.

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