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Methods and systems to compensate IQ imbalance in zero-IF tuners

Abstract(summary):

Methods and systems to calibrate I/Q imbalance with digital equalizers to compensate frequency dependent IQ imbalance, weighted summation modules to compensate frequency independent IQ imbalance, switch modules to controllably direct calibration signals through selected components and to a digital compensation calculator and to control tuner phases during calibration. The equalizers and summation modules may provide genetic IQ imbalance compensation. Methods and systems disclosed herein may be implemented with respect to relatively wideband systems having non-linear spectrum responses, and other systems.


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