Digital analog dither adjustment
AssigneeRaytheon Company
InventorsIan S. Robinson, Daniel Thompson, James Toplicar
Life of this patent
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Abstract
A method and system for data conversion includes an analog noise generator to generate a random, non-deterministic, analog noise signal. An adder adds the analog noise signal to an analog RF signal to produce a dithered analog signal. A first quantizer converts the analog noise signal to digital to produce a digital noise signal. A second quantizer converts the dithered analog signal to a digital equivalent signal. A digital dither adjustment module removes amplitude measurements of the digital noise signal from the digital equivalent signal to obtain a linearized digital representation of the analog RF signal.
Claims20
A data conversion system, comprising:
- an analog noise generator adapted to generate a random, non-deterministic, analog noise signal;
- an adder adapted to add the analog noise signal to an analog RF signal to produce a dithered analog signal;
- a first quantizer adapted to convert the analog noise signal to digital to produce a digital noise signal;
- a second quantizer adapted to convert the dithered analog signal to a digital equivalent signal;
- and
- a digital dither adjustment module adapted to remove amplitude measurements of the digital noise signal from the digital equivalent signal to obtain a linearized digital representation of the analog RF signal.
A method of linearizing a quantizer, comprising:
- generating with an analog noise generator a random, non-deterministic, analog noise signal;
- adding the noise signal to an analog RF signal to produce a dithered analog signal;
- converting the analog noise signal to a digital noise signal with a first quantizer;
- converting the dithered analog signal to a digital equivalent signal with a second quantizer;
- and
- removing measured amplitudes of the digital noise signal from the digital equivalent signal to obtain a linearized digital representation of the analog RF signal.
Dependencies are inferred from the claim text.