Frequency tracking loop and method of frequency tracking

Details Frequency tracking loop and method of frequency tracking Frequency tracking loop and method of frequency tracking

2006-04-11

2006-04-11

Deppe, Betsy L. (Department: 2637)

Pulse or digital communications

Receivers

Automatic frequency control

C455S266000

Reexamination Certificate

active

07027535

ABSTRACT:
A frequency tracking loop (100) includes: a mixer (122) for correcting frequency offset of an input radio signal that includes bursts of known data; a frequency offset estimator (134), for providing an estimate of frequency offset; a variable bandwidth filter (142), for providing a filtered signal; an oscillator (146) for supplying a second input of the mixer with a signal whose frequency depends on the filtered signal; the frequency tracking loop (100) is adapted to change the bandwidth of the variable bandwidth filter (142) in dependence on at least one characteristic of the currently received burst of known data.

REFERENCES:
patent: 4106102 (1978-08-01), Desblache
patent: 4348772 (1982-09-01), Leland et al.
patent: 4691176 (1987-09-01), Hsiung et al.
patent: 4961206 (1990-10-01), Tomlinson et al.
patent: 5331299 (1994-07-01), Smith
patent: 5513221 (1996-04-01), Parr et al.
patent: 5822373 (1998-10-01), Addy
patent: 5894592 (1999-04-01), Brueske et al.
patent: 6226336 (2001-05-01), Atarius et al.
patent: 6324228 (2001-11-01), Millward et al.
patent: 6476681 (2002-11-01), Kirkpatrick
patent: 6650715 (2003-11-01), Kim et al.
patent: 2001/0055348 (2001-12-01), Anderson et al.
M. Swahashi and K. Murota, Variable-Bandwidth Filter Using SCF and MOSFET-C Filter, ISCAS '89, May 8-11, 1989, 1989 IEEE International Symposium on Circuits and Systems, vol. 2, pp. 1455-1458.

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