Patent ID: 7471736

Claim:
A transmitter, comprising: an upconverter for converting a first frequency signal to a second frequency signal, the second frequency signal including in-phase components and quadrature phase components; a compensator including a plurality of filter units for compensating at least one of gain distortion and phase distortion introduced into the second frequency signal by at least the upconverter, the plurality of filter units including a first set of filter units configured to filter the in-phase components and quadrature phase components, output of the first set of filter units producing at least one of a gain compensated in-phase signal and a phase compensated in-phase signal, and a second set of filter units configured to filter the in-phase components quadrature phase components, output of second set of filter units producing at least one of a gain compensated quadrature-phase signal and a phase compensated quadrature-phase signal; a compensator constructor, based on a channel model of at least the upconverter that includes an in-phase channel, a quadrature phase channel and cross coupling channels between the in-phase and quadrature phase channels, estimating the in-phase channel, the quadrature phase channel, and the cross coupling channels between the in-phase and quadrature phase components, and configuring filters taps for the first and second set of filter units; and a predistorter to predistort the first frequency signal.