Methods and apparatus for frequency tracking of a received...

Details Methods and apparatus for frequency tracking of a received... Methods and apparatus for frequency tracking of a received...

2006-11-08

2010-06-29

Lugo, David B (Department: 2611)

Pulse or digital communications

Receivers

Automatic frequency control

C375S260000, C375S326000

Reexamination Certificate

active

07746963

ABSTRACT:
Methods and apparatus for frequency tracking of a received signal. In an aspect, a method is provided wherein the received signal comprises one or more symbols having a periodic structure. The method comprises receiving a plurality of samples of a selected symbol that comprises pilot signals scrambled with data and determining a window size and a periodicity factor. The method also comprises accumulating a correlation between samples in a first window and samples in a second window to produce an accumulated correlation value, wherein the first and second windows have a size and a separation based on the window size and the periodicity factor, respectively, and deriving a frequency error estimate based on the accumulated correlation value.

REFERENCES:
patent: 2004/0005018 (2004-01-01), Zhu et al.
patent: 2004/0005022 (2004-01-01), Zhu et al.
patent: 2006/0115025 (2006-06-01), Kim et al.
patent: 2006/0133527 (2006-06-01), Yu et al.
patent: 2007/0230591 (2007-10-01), Choi et al.
patent: 2008/0043613 (2008-02-01), Yang et al.
patent: 2004/049618 (2004-06-01), None
patent: 2005/074224 (2005-08-01), None

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