Multi-dimensional volterra series transmitter linearization
AssigneeResearch In Motion Limited
InventorsJohn-Peter van Zelm, Peter Rashev, John Holt
Life of this patent
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Abstract
A radio transmission system comprising a plurality of Volterra Engine (VE) linearizers; a power amplifier (PA) coupled to the YE linearizers; a feedback circuitry coupled to the VE linearizers and the PA; and at least one adaptive controller coupled to the feedback circuitry, wherein each VE linearizer is coupled to at least another VE linearizer in series, in parallel, or both, and is configured to compensate for at least one distortion aspect of an output signal from the PA.
Claims20
A signal distortion compensation system comprising:
- a first Volterra Engine (VE) linearizer;
- a second VE linearizer coupled to the first VE linearizer;
- and
- means for providing a feedback signal to the second VE linearizer,
- wherein the first VE linearizer is configured to linearize and reduce distortion in an output signal, and the second VE linearizer is optimized to de-embed feedback distortion in the feedback signal.
A signal distortion compensation system comprising:
- a first Volterra Engine (VE) linearizer;
- a second VE linearizer coupled to the first VE linearizer;
- and
- a feedback circuitry coupled to the second VE linearizer,
- wherein the first VE linearizer is configured to linearize and reduce distortion in an output signal, and the second VE linearizer is optimized to de-embed feedback distortion in a feedback signal.
A signal distortion compensation method comprising:
- using a first Volterra Engine (VE) linearizer to linearize an output signal by compensating for amplification distortion;
- and
- using a second VE linearizer coupled to the first VE linearizer to de-embed signal distortion introduced by feedback circuitry coupled to the second VE linearizer to improve distortion compensation and linearization efficiency of a VE based system.
Dependencies are inferred from the claim text.