Patent ID: 8379767
Filing Date: 2013-02-19
Classification: H04B,H04L

Abstract:
1. A system, comprising: a transceiver including a transmit path and a receive path, each including corresponding zero intermediate frequency (ZIF) in-phase and quadrature phase (I and Q) tuners, each further including a digital equalizer to compensate frequency dependent IQ imbalance and a digital weighted summation module to compensate frequency independent IQ imbalance of the corresponding ZIF tuners; a signal generator to provide a calibration signal to I and Q digital baseband nodes of the transmit path during a calibration mode; a switching system to configure a plurality of loop-back paths and to control phases of the I and Q tuners during the calibration mode; and a digital calibration system to receive I and Q digital baseband signals from the receive path in coordination with the switching system, to determine transmit and receive path compensation values, including equalization coefficients and summation weights, in a digital domain based on the received digital baseband signals, and to apply the transmit and receive path compensation values in the digital domain during an operation mode.