Patent ID: 8761306

Claim:
A transmission circuit, comprising: a first offset generation circuit configured to selectively introduce a first frequency offset into in-phase (I) and quadrature phase (Q) equivalent baseband signals received from a digital signal conditioning unit; a second offset generation circuit configured to selectively introduce a second frequency offset into local oscillator signals generated based upon an oscillator output signal received from a local oscillator; a modulation circuit configured to perform a modulation of the offset equivalent baseband signals onto offset local oscillator signals to generate a composite modulated output signal, wherein the modulation cancels the first and second frequency offsets so that the frequency of the oscillator output signal is not overlaid with harmonics of the composite modulated output signal; and a digital controller configured to calculate a figure of merit relating to an output signal of the transmission circuit and to introduce the first frequency offset into the baseband equivalent signals and the second frequency offset into the local oscillator signals, if the figure of merit violates a predetermined metric.