Compensation of I-Q imbalance in digital transceivers

Details Compensation of I-Q imbalance in digital transceivers Compensation of I-Q imbalance in digital transceivers

2007-07-24

2007-07-24

Bayard, Emmanuel (Department: 2611)

Pulse or digital communications

Transceivers

C455S068000, C455S232100

Reexamination Certificate

active

10235389

ABSTRACT:
A transceiver includes a switching unit configurable for isolating an input of a receiver from an output of a transmitter during a local calibration mode. A known signal present at the output at a first power level during the calibration mode will also be present at the input at a second power level lower than the first power level and will be converted by the quadrature demodulator. A compensation factor is estimated for compensating the receiver section for imbalances in the in-phase and quadrature phase signals resulting from conversion of the known signal. Remote calibration is implemented using a method for remotely compensating for I-Q imbalance wherein a data packet having a known signal is transmitted to a receiver for conversion by a quadrature demodulator and compensation factors are estimated for compensating for imbalances in the in-phase and quadrature phase signals resulting from conversion of the known signal.

REFERENCES:
patent: 4003054 (1977-01-01), Goldstone
patent: 4885799 (1989-12-01), Van Horn
patent: 5263196 (1993-11-01), Jasper
patent: 5617240 (1997-04-01), Hergault et al.
patent: 5705949 (1998-01-01), Alelyunas et al.
patent: 5774792 (1998-06-01), Tanaka et al.
patent: 5930286 (1999-07-01), Walley
patent: 5991603 (1999-11-01), Aoki et al.
patent: 6009317 (1999-12-01), Wynn
patent: 6212397 (2001-04-01), Langston et al.
patent: 6330290 (2001-12-01), Glas
patent: 6351628 (2002-02-01), Leizerovich et al.
patent: 6366622 (2002-04-01), Brown et al.
patent: 6400233 (2002-06-01), Thomas
patent: 6452983 (2002-09-01), Asahara et al.
patent: 6490326 (2002-12-01), Bastani et al.
patent: 6606483 (2003-08-01), Baker et al.
patent: 6625111 (2003-09-01), Sudo
patent: 6654595 (2003-11-01), Dexter
patent: 6683926 (2004-01-01), Zarubinsky et al.
patent: 6717981 (2004-04-01), Mohindra
patent: 6819938 (2004-11-01), Sahota
patent: 6940916 (2005-09-01), Warner et al.
patent: 6968167 (2005-11-01), Wu et al.
patent: 6987956 (2006-01-01), Yoon
patent: 2001/0049264 (2001-12-01), Balech
patent: 2003/0007574 (2003-01-01), Li et al.
patent: 2003/0031273 (2003-02-01), Mohindra
patent: 2003/0067359 (2003-04-01), Darabi et al.
patent: 2003/0109241 (2003-06-01), Kim
patent: 2003/0174641 (2003-09-01), Rahman
patent: 2003/0186665 (2003-10-01), Black et al.
patent: 2003/0206603 (2003-11-01), Husted
patent: 2004/0018819 (2004-01-01), Coan
patent: 2004/0038649 (2004-02-01), Lin et al.

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