Patent ID: 9106502
Filing Date: 2015-08-11
Classification: H04B,H04L

Abstract:
1. An apparatus comprising: an in-phase/quadrature (I/Q) imbalance calibrator to determine a plurality of calibration parameters to calibrate I/Q imbalance of both a Radio Frequency (RF) Receive (Rx) path of a transceiver and a RF Transmit (Tx) path of said transceiver, the plurality of calibration parameters including a plurality of Tx I/Q calibration parameters to be applied to said RF Tx path, and a plurality of Rx I/Q calibration parameters to be applied to said RF Rx path; a Tx IQ imbalance compensator to apply said plurality of Tx I/Q calibration parameters to said RF Tx path; an Rx IQ imbalance compensator to apply said Rx I/Q calibration parameters to said RF Rx path; a Numerically Controlled Oscillator (NCO) to downconvert an output of said Rx IQ imbalance compensator; a digital source to generate first and second signals in the form of Single Side Band (SSB) signals; and an accumulator to generate a first phasor by accumulating an output of said NCO responsive to said first signal, and to generate a second phasor by accumulating an output of said NCO responsive to said second signal, wherein the first phasor includes a phasor of an image component of the first signal transmitted via said RF Tx path, shifted by a first phase shift and received via said RF Rx path, wherein the second phasor includes a phasor of an image component of the second signal transmitted via said RF Tx path, shifted by a second phase shift, different from said first phase shift, and received via said RF Rx path, and wherein the in-phase/quadrature (I/Q) imbalance calibrator is to determine the plurality of calibration parameters based on a sum of a first power and a second power, the first power including a power of said first phasor, and the second power including a power of said second phasor.