Method and apparatus for I/Q imbalance compensation

Details Method and apparatus for I/Q imbalance compensation Method and apparatus for I/Q imbalance compensation

2006-06-14

2010-11-09

Deppe, Betsy L (Department: 2611)

Pulse or digital communications

Transceivers

C375S322000, C455S067140, C455S073000

Reexamination Certificate

active

07830954

ABSTRACT:
Various embodiments are disclosed relating to a wireless transceiver. In an example embodiment, a method of compensating for phase imbalance and amplitude imbalance between corresponding in-phase signals and quadrature-phase signals includes providing a plurality of test tones of various frequencies to a receiver and determining, for each of the test tones, a respective phase imbalance and a respective amplitude imbalance between an in-phase (I) signal and a quadrature-phase (Q) signal of the test tone. The example method also includes determining a set of filter coefficients based on the determined phase and amplitude imbalances of the plurality of test tones and applying the set of filter coefficients to a plurality of filters. In the example method, a phase imbalance between an I signal and a Q signal of a received wireless signal is compensated for using a first filter of the plurality of filters. Further, an amplitude imbalance between the I and Q signals of the received wireless signal is compensated for using a second filter of the plurality of filters.

REFERENCES:
patent: 2004/0203472 (2004-10-01), Chien
patent: 2005/0260949 (2005-11-01), Kiss et al.
patent: 2007/0099570 (2007-05-01), Gao et al.

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