Linearity error compensator
OwnerScott R. Velazquezinventor
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Abstract
In one aspect, the present invention is directed to a compensator for compensating linearity errors, such as harmonic distortion and intermodulation distortion, in devices. The compensator includes a means for phase-shifting and a means for exponentiation to generate a compensation signal such that the linearity error distortion signals are canceled in the system output while maintaining the desired fundamental signal. Another aspect of the invention is directed to methods for calibrating the linearity error compensator. Another aspect of the invention is directed to a modeling linearity errors in a device.
Claims11
A compensator for compensating linearity errors in a device generating a fundamental signal and linearity error distortion signals comprising:
- an exponentiator with a power unit for generating an exponentiated compensation signal;
- and
- a phase-shifting unit following the power unit for introducing a phase-shift between the fundamental signal and the exponentiated compensation signal such that the linearity error distortion signals are canceled and the fundamental signal is maintained.
A method of compensating linearity errors in a device generating a fundamental signal and linearity error distortion signals comprising steps of:
- exponentiating a compensation signal using a power method to generate an exponentiated compensation signal;
- and
- phase-shifting the exponentiated compensation signal, wherein the phase-shift is based on the frequency of the exponentiated compensation signal, such that the linearity error distortion signals are canceled and the fundamental signal is maintained.
Dependencies are inferred from the claim text.