Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2005-09-06
2005-09-06
Liu, Shuwang (Department: 2634)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S316000, C375S147000, C375S322000, C375S326000, C455S296000, C455S313000
Reexamination Certificate
active
06940930
ABSTRACT:
A method and apparatus for balancing I/Q gain and I/Q phase in a signal receiver. The receiver includes an IQ coefficient calculator and an IQ balancer. The IQ coefficient calculator computes a set of correction coefficients for each packet from the I and Q signals in an IQ measurement section at the front of the packet. The IQ balancer uses the correction coefficients for correcting the I/Q gain and I/Q phase errors on a packet-by-packet basis. Optionally, delay devices delay the I and Q signals so that the correction coefficients may be applied to the entire packet, or the portion of the packet in the IQ measurement section is passed through uncorrected and the correction coefficients are applied to the packet after the IQ measurement section.
REFERENCES:
patent: 6330290 (2001-12-01), Glas
patent: 6377620 (2002-04-01), Ozluturk et al.
patent: 6442217 (2002-08-01), Cochran
patent: 2003/0174641 (2003-09-01), Rahman
patent: 2004/0063416 (2004-04-01), Kuenen et al.
patent: 2004/0146120 (2004-07-01), Brown
Li Yu & W. Mation Snelgrove, “A Novel Adaptive Mismatch Cancellation System for Quadrature IF Radio Receiver”, IEEE Transactions On Circuits and Systems—II: Analog and Digital Signal Processing, vol. 46, No. 6, pp. 789-801, Jun., 1999.
Ediz Cetin, Izzet Kale & Richard C. S. Morlin, “Adaptive Compensation of Analog Front-End I/Q Mismatches in Digital Receivers”, pp. IV-370 to IV373, IEEE, 2001.
James K. Cavers, & Maria W. Liao, “Adaptive Compensation for Imbalance and Offset Losses in Direct Conversion Transceivers” IEEE Transactions on Vehicular Technology, vol. 42, No. 4, pp. 581-588, Nov., 1993.
Knog-pan Pun, Jose E. Franca & C. Azeredo-Leme, “Wideband Digital Correction and I and Q Mismatch in Quadrature Radio Receivers”, ISCAS 2000—IEEE International Symposium on Circuits and Systems, May 28-31, 2000, pp. V661-V664, Geneva, Switzerland.
Ediz Cetin, Izzet Kale & Richard C. S. Morling, “On the Structure, Convergence and Performance of an Adaptive I/Q Mismatch Corrector”, pp. 2288-2292, IEEE, 2002.
Brown James E. C.
Rothenberg Bret
Brady III W. James
Liu Shuwang
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
Zheng Eva
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