Pulse or digital communications – Receivers
Reexamination Certificate
2011-01-25
2011-01-25
Pathak, Sudhanshu C (Department: 2611)
Pulse or digital communications
Receivers
C375S324000, C375S261000, C375S320000, C375S285000, C379S406080, C714S048000, C714S796000, C381S318000, C381S074000
Reexamination Certificate
active
07876856
ABSTRACT:
Methods and apparatus to compensate for I/Q mismatch in quadrature receivers are disclosed. An example apparatus disclosed herein comprises a correction engine using first filter coefficients to compensate for I/Q mismatch present in a received quadrature signal; an adaptation engine to adapt second filter coefficients based on I/Q mismatch present in the received quadrature signal; and coefficient controller to occasionally adjust the first filter coefficients based on the second filter coefficients.
REFERENCES:
patent: 5664011 (1997-09-01), Crochiere et al.
patent: 7346175 (2008-03-01), Hui et al.
patent: 2002/0010896 (2002-01-01), Huttunen
patent: 2002/0064291 (2002-05-01), Kates et al.
patent: 2002/0137510 (2002-09-01), Sims et al.
patent: 2003/0053647 (2003-03-01), Kates
patent: 2004/0193965 (2004-09-01), Coersmeier
patent: 2005/0089115 (2005-04-01), Hartmann et al.
patent: 2005/0163250 (2005-07-01), McCallister
patent: 2006/0056554 (2006-03-01), Lin et al.
Lawrence Der, Behzad Razavi, “A 2-GHz CMOS Image Reject Receiver with LMS Calibration”, IEEE Journal of Solid-State Circuits, vol. 38, No. 2, Feb. 2003.
Farbod Behbahani, Yoji Kishigami, John Leete, Asad A. Abidi, “CMOS Mixers and Polyphase Filters for Large Image Rejection”, IEEE Jounal of Solid-State Circuits, vol. 36, No. 6, Jun. 2001.
Isis Mikhael, Wasfy B. Mikhael, “Adaptive IQ Mismatch Cancellation for Quadrature IF Receivers”, submitted to IEEE Midwest Symposium on Circuits, Aug. 2002.
Mikko Valkama, Markku Renfors, “Advanced DSP for I/Q Imbalance Compensation in a Low-IF Receiver”, IEEE International Conference on Communications, 2000, pp. 768-772, Jun. 2000.
Jan Tubbax, Boris Côme, Liestbet Van der Perre, Stéphane Donnay, Marc Engels, Claude Desset, “Joint Compensation of IQ Imbalance and Phase Noise”, Vehicular Technology Conference, 2003, pp. 1605-1609, Apr. 2003.
K.P. Pun, J.E. Franca, C. Azeredo-Leme, “The Correction of Frequency-Dependent I/Q Mismatches in Quadrature Receivers by Adaptive Signal Separation”, Proceedings of 4thInternational Conference on ASIC, 2001, pp. 424-427.
Li Yu and W.M. Snelgrove, “A Novel Adaptive Mismatch Cancellation System for Quadrature IF Radio Receivers”, IEEE Transactions on Circuits and Systems:-II: Analog and Digital Signal Processing, vol. 46, No. 6, pp. 789-801, Jun. 1999.
D.V. Compernolle and S.V. Gerven, “Signal Separation in a Symmetric Adaptive Noise Canceller by Output Decorrelation”, in Proceedings of the International Conference on Acoustic Speech Signal Processing, vol. IV, pp. 221-224, Mar. 1992.
S.V. Gerven and D.V. Compernolle, “Signal Separation by Symmetric Adaptive Decorrelation: stability, convergence and uniqueness,” IEEE Transactions of Signal Processing, vol. 43, No. 7, pp. 1602-1612, Jul. 1992.
Elahi et al., I/Q Mismatch Compensation in a 90nm Low-IF CMOS Receiver, Presentation, IEEE International Solid-State Circuits Conference, 2005, Session 29, 2005.
Elahi et al., I/Q Mismatch Compensation in a 90nm Low-IF CMOS Receiver, IEEE International Solid-State Circuits Conference, 2005, Session 29, 2005, pp. 19-21.
Kazuo Ochiai, Takashi Araseki, and Takashi Ogihara, “Echo Canceler with Two Echo Path Models,” IEEE Transactions on Communication, vol. COM-25, No. 6, Jun. 1977, 7 pages.
Elahi Imtinan
Muhammad Khurram
Bassuk Lawrence J.
Brady W. James
Pathak Sudhanshu C
Telecky , Jr. Frederick J.
Texas Instrumentals Incorporated
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