Apparatus for and method of controlling a feedforward filter...

Pulse or digital communications – Equalizers – Automatic

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C375S229000, C708S323000

Reexamination Certificate

active

07822112

ABSTRACT:
A method of synchronizing a feedforward filter that receives a signal resulting from the transmission of a series of symbols through a channel, wherein the series of symbols includes a predetermined sequence of symbols includes the step of developing a plurality of samples from the received symbols, wherein a sequence of samples corresponds to the predetermined sequence of symbols. The method may further include the steps of estimating a channel impulse response from the plurality of samples, wherein the channel impulse response estimate is represented by a plurality of correlation values, identifying a maximum correlation value from the plurality of correlation values, defining a window relative to the maximum correlation value, calculating a characteristic of the correlation values within the window, and synchronizing the feedforward filter in accordance with the characteristic.

REFERENCES:
patent: 4871974 (1989-10-01), Davis et al.
patent: 4926499 (1990-05-01), Kobayashi et al.
patent: 5233634 (1993-08-01), Väisänen
patent: 5282225 (1994-01-01), Nikias et al.
patent: 5537419 (1996-07-01), Parr et al.
patent: 5550596 (1996-08-01), Strolle et al.
patent: 5642382 (1997-06-01), Juan
patent: 5675612 (1997-10-01), Solve et al.
patent: 5706057 (1998-01-01), Strolle et al.
patent: 5796786 (1998-08-01), Lee
patent: 5805242 (1998-09-01), Strolle et al.
patent: 5832045 (1998-11-01), Barber
patent: 5835532 (1998-11-01), Strolle et al.
patent: 5841484 (1998-11-01), Hulyalkar et al.
patent: 5852630 (1998-12-01), Langberg et al.
patent: 5894334 (1999-04-01), Strolle et al.
patent: 5903610 (1999-05-01), Sköld et al.
patent: 5940450 (1999-08-01), Koslov et al.
patent: 5991349 (1999-11-01), Chen
patent: 6021161 (2000-02-01), Yamaguchi et al.
patent: 6133965 (2000-10-01), Dobrovolny
patent: 6147555 (2000-11-01), Posner et al.
patent: 6175279 (2001-01-01), Ciccarelli et al.
patent: 6219379 (2001-04-01), Ghosh
patent: 6259743 (2001-07-01), Garth
patent: 6313698 (2001-11-01), Zhang et al.
patent: 6313885 (2001-11-01), Patel et al.
patent: 6314148 (2001-11-01), Fulghum
patent: 6356598 (2002-03-01), Wang
patent: 6411659 (2002-06-01), Liu et al.
patent: 6421379 (2002-07-01), Vannatta et al.
patent: 6434205 (2002-08-01), Taura et al.
patent: 6438164 (2002-08-01), Tan et al.
patent: 6522243 (2003-02-01), Saulnier et al.
patent: 6650699 (2003-11-01), Tierno
patent: 6671314 (2003-12-01), Abe et al.
patent: 6671342 (2003-12-01), Lin et al.
patent: 6734920 (2004-05-01), Ghosh et al.
patent: 6771719 (2004-08-01), Koyama et al.
patent: 6775334 (2004-08-01), Liu et al.
patent: 6823489 (2004-11-01), Wittig et al.
patent: 6842495 (2005-01-01), Jaffe et al.
patent: 7313182 (2007-12-01), Fimoff et al.
patent: 2002/0141483 (2002-10-01), Doetsch et al.
patent: 2002/0150185 (2002-10-01), Meehan et al.
patent: 2002/0172275 (2002-11-01), Birru
patent: 2002/0186762 (2002-12-01), Xia et al.
patent: 2003/0058962 (2003-03-01), Baldwin
patent: 2003/0058967 (2003-03-01), Lin et al.
patent: 2003/0161421 (2003-08-01), Schmidt et al.
patent: 2003/0212947 (2003-11-01), Schenk et al.
patent: 2003/0223517 (2003-12-01), Fimoff et al.
patent: 2004/0077324 (2004-04-01), Wieck
patent: 2004/0151236 (2004-08-01), Lilleberg et al.
International Search Report and Written Opinion in PCT/US05/12152, both dated Oct. 21, 2005.
International Preliminary Report on Patentability in PCT/US05/12152 dated Oct. 11, 2006.
International Search Report and Written Opinion in PCT/US05/28907, both dated Jan. 30, 2006.
International Preliminary Report on Patentability in PCT/US05/28907 dated Feb. 22, 2007.
International Search Report and Written Opinion in PCT/US2005/011912, both dated Aug. 31, 2005.
International Preliminary Report on Patentability in PCT/US2005/011912 dated Oct. 11, 2006.
International Search Report and Written Opinion in PCT/US2005/012125, both dated Aug. 26, 2005.
International Preliminary Report on Patentability in PCT/US2005/012125 dated Oct. 11, 2006.
International Search Report and Written Opinion in PCT/US2005/012056, both dated Sep. 6, 2005.
International Preliminary Report on Patentability in PCT/US2005/012056 dated Oct. 11, 2006.
International Search Report and Written Opinion in PCT/US2005/011906, both dated Aug. 19, 2005.
International Preliminary Report on Patentability in PCT/US2005/011906 dated Oct. 11, 2006.
International Search Report and Written Opinion in PCT/US2005/011909, both dated Mar. 20, 2006.
International Preliminary Report on Patentability in PCT/US2005/011909 dated Oct. 11, 2006.
International Search Report and Written Opinion in PCT/US05/11907, both dated Aug. 2, 2005.
International Preliminary Report on Patentability in PCT/US05/11907 dated Oct. 19, 2006.
International Search Report and Written Opinion in PCT/US2005/011963, both dated Aug. 12, 2005.
International Preliminary Report on Patentability in PCT/US2005/011963 dated Oct. 11, 2006.
International Search Report and Written Opinion in PCT/US2005/012158, both dated Jul. 15, 2005.
International Preliminary Report on Patentability in PCT/US2005/012158 dated Oct. 11, 2006.
“ATSC Digital Television Standard”, ATSC Doc. A/53, Sep. 16, 1995.
“An Advanced Digital Television Broadcasting System”, Zhang et al., Supplement to Proceedings, 7thInt. Symp. On Broad. Tech. Aug. 25, 2001, 13 pages.
“Results of the Laboratory Evaluation of an 8MHz ADTB-T Television System for Terrestrial Broadcasting”, Communications Research Centre Canada, Jan. 15, 2003, 19 pages.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for and method of controlling a feedforward filter... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for and method of controlling a feedforward filter..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for and method of controlling a feedforward filter... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4196932

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.