Data directed frequency acquisition loop that synchronizes...

Details Data directed frequency acquisition loop that synchronizes... Data directed frequency acquisition loop that synchronizes...

2005-12-27

2005-12-27

Pascal, Robert (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

C331S00100A, C329S308000

Reexamination Certificate

active

06980059

ABSTRACT:
A data-directed frequency-acquisition loop capable of generating a frequency error having a magnitude and direction from a double sideband suppressed signal comprises a first multiplier that multiplies the signal by the output of a VCO. The output of the first multiplier is convolved by a second multiplier. The I output of the second multiplier passes through a first low-pass filter. The filtered I output and the Q output are then multiplied by a third multiplier. The output of the third multiplier is filtered through a second low-pass filter, amplified, and return to the VCO to complete the feedback loop.

REFERENCES:
patent: 4567599 (1986-01-01), Mizoguchi
patent: 4712221 (1987-12-01), Pearce et al.
patent: 4815103 (1989-03-01), Cupo et al.
patent: 4833693 (1989-05-01), Eyuboglu
patent: 4856031 (1989-08-01), Goldstein
patent: 4866395 (1989-09-01), Hostetter
patent: 4989090 (1991-01-01), Campbell et al.
patent: 5052000 (1991-09-01), Wang et al.
patent: 5056117 (1991-10-01), Gitlin et al.
patent: 5134480 (1992-07-01), Wang et al.
patent: 5210774 (1993-05-01), Abbiate et al.
patent: 5311546 (1994-05-01), Paik et al.
patent: 5453797 (1995-09-01), Nicolas et al.
patent: 5471508 (1995-11-01), Koslov
patent: 5506636 (1996-04-01), Patel et al.
patent: 5508752 (1996-04-01), Kim et al.
patent: 5532750 (1996-07-01), De Haan et al.
patent: 5537435 (1996-07-01), Carney et al.
patent: 5568098 (1996-10-01), Horie et al.
patent: 5568521 (1996-10-01), Williams et al.
patent: 5588025 (1996-12-01), Strolle et al.
patent: 5619154 (1997-04-01), Strolle et al.
patent: 5648987 (1997-07-01), Yang et al.
patent: 5692014 (1997-11-01), Basham et al.
patent: 5757855 (1998-05-01), Strolle et al.
patent: 5789988 (1998-08-01), Sasaki
patent: 5802461 (1998-09-01), Gatherer
patent: 5805242 (1998-09-01), Strolle et al.
patent: 5828705 (1998-10-01), Kroeger et al.
patent: 5835532 (1998-11-01), Strolle et al.
patent: 5862156 (1999-01-01), Huszar et al.
patent: 5870433 (1999-02-01), Huber et al.
patent: 5872817 (1999-02-01), Wei
patent: 5894334 (1999-04-01), Strolle et al.
patent: 5995154 (1999-11-01), Heimburger
patent: 6005640 (1999-12-01), Strolle et al.
patent: 6034734 (2000-03-01), De Haan et al.
patent: 6034998 (2000-03-01), Takashi et al.
patent: 6044083 (2000-03-01), Citta et al.
patent: 6069524 (2000-05-01), Mycynek et al.
patent: 6133785 (2000-10-01), Bourdeau
patent: 6133964 (2000-10-01), Han
patent: 6145114 (2000-11-01), Crozier et al.
patent: 6154487 (2000-11-01), Murai et al.
patent: 6178209 (2001-01-01), Hulyalkar et al.
patent: 6195400 (2001-02-01), Maeda
patent: 6198777 (2001-03-01), Feher
patent: 6219379 (2001-04-01), Ghosh
patent: 6222891 (2001-04-01), Liu et al.
patent: 6226323 (2001-05-01), Tan et al.
patent: 6233286 (2001-05-01), Wei
patent: 6249544 (2001-06-01), Azazzi et al.
patent: 6260053 (2001-07-01), Maulik et al.
patent: 6272173 (2001-08-01), Hatamian
patent: 6275554 (2001-08-01), Bouillet et al.
patent: 6278736 (2001-08-01), De Haan et al.
patent: 6304614 (2001-10-01), Abbaszadeh et al.
patent: 6307901 (2001-10-01), Yu et al.
patent: 6333767 (2001-12-01), Patel et al.
patent: 6356586 (2002-03-01), Krishnamoorthy et al.
patent: 6363124 (2002-03-01), Cochran
patent: 6411341 (2002-06-01), De Haan et al.
patent: 6411659 (2002-06-01), Liu et al.
patent: 6415002 (2002-07-01), Edwards et al.
patent: 6421378 (2002-07-01), Fukuoka et al.
patent: 6438164 (2002-08-01), Tan et al.
patent: 6452639 (2002-09-01), Wagner et al.
patent: 6466630 (2002-10-01), Jensen
patent: 6490007 (2002-12-01), Bouillet et al.
patent: 6493409 (2002-12-01), Lin et al.
patent: 6507626 (2003-01-01), Limberg
patent: 6535553 (2003-03-01), Limberg et al.
patent: 6611555 (2003-08-01), Smith et al.
patent: 6734920 (2004-05-01), Ghosh et al.
patent: 2001/0048723 (2001-12-01), Oh
patent: 2002/0024996 (2002-02-01), Agazzi et al.
patent: 2002/0136329 (2002-09-01), Liu et al.
patent: 2002/0154248 (2002-10-01), Wittig et al.
patent: 2002/0172275 (2002-11-01), Birru
patent: 2002/0172276 (2002-11-01), Tan et al.
patent: 2002/0186762 (2002-12-01), Xia et al.
patent: 2002/0191716 (2002-12-01), Xia et al.
patent: 2003/0058967 (2003-03-01), Lin et al.
patent: 0524559 (1997-05-01), None
patent: 0752185 (2002-07-01), None
patent: WO 00/27033 (2000-05-01), None
patent: WO 00/27066 (2000-05-01), None
patent: WO 01/01650 (2001-01-01), None
patent: WO 01/13516 (2001-02-01), None
patent: WO 01/43310 (2001-06-01), None
patent: WO 01/43384 (2001-06-01), None
Demodulation of Cochannel QAM Signals (continued); Error Detection/Correction; pp. 1-3, http://www.appsig.com/papers/1813f/813f_4.html.
Demodulation of Cochannel QAM Signals (continued); Simulation Results; pp. 1-6; http://www.appsig.com/papers/1813f/813f_5.html.

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