Patent ID: 8565707

Claim:
An apparatus comprising: a digital-to-analog conversion unit operable to: generate a radio frequency (RF) analog composite signal comprising an RF transmission signal component and a superimposed RF spectral image signal component; a spectral image cancellation unit coupled with the digital-to-analog conversion unit, the spectral image cancellation unit operable to: generate a baseband analog composite signal comprising a baseband transmission signal component and a superimposed baseband spectral image signal component; filter the baseband analog composite signal to yield a baseband spectral image signal; up-convert the baseband spectral image signal in accordance with a predetermined carrier signal to yield an RF spectral image signal; and subtract the RF spectral image signal from the RF analog composite signal generated by the digital-to-analog conversion unit to reduce the superimposed RF spectral image signal component associated with the RF analog composite signal and generate an output RF transmission signal; and an error calibration unit coupled with the spectral image cancellation unit, the error calibration unit operable to: down-convert the RF transmission signal in accordance with a first predetermined local oscillator frequency, wherein the first predetermined local oscillator frequency is different from a second predetermined local oscillator frequency associated with the RF transmission signal; and determine an error amplification factor for amplifying the RF spectral image signal based, at least in part, on an amplitude of the down-converted superimposed RF spectral image signal component.