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US 11,516,054 B2Granted
Polar transmitter with feedthrough compensation
AssigneeHuawei Technologies Co., Ltd.
InventorsWael Al-Qaq, Xiaobao Yu, Zhihang Zhang, Min Yi
Life of this patent
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Abstract
A circuit includes a polar transmitter to generate a radio frequency output from amplitude and phase signal components. The polar transmitter includes an amplifier to combine amplitude and phase signal components. A processor is coupled to the polar transmitter to provide the amplitude and phase signal components. The processor includes: a digital modulation circuit to generate a modulated digital signal including in-phase and quadrature signal components and a correction circuit to calculate and apply a complex digital offset for local oscillator feedthrough of the amplifier. The complex digital offset includes an in-phase offset correction factor and a quadrature offset correction factor.
Claims21
A circuit comprising:
- a polar transmitter configured to generate a radio frequency output based on an amplitude signal component received at an amplitude input and a phase signal component received at a phase input, the polar transmitter including an amplifier to combine amplitude and phase signal components;
- a processor coupled to the polar transmitter, the processor configured to provide the amplitude signal component to the amplitude input and to provide the phase signal component to the phase input, the processor comprising:
- a digital modulation circuit configured to generate a modulated digital signal including an in-phase signal component and a quadrature signal component for conversion to the amplitude signal component and the phase signal component;
- and
- a correction circuit configured to calculate a complex digital offset and apply the complex digital offset to correct the amplitude signal component and the phase signal component for local oscillator feedthrough of the amplifier, the complex digital offset includes an in-phase offset correction factor and a quadrature offset correction factor.
2 more elements
A method comprising:
- generating a modulated digital signal including an in-phase signal component and a quadrature signal component;
- converting the modulated digital signal to an amplitude signal component and a phase signal component;
- combining the amplitude signal component and the phase signal component in an amplifier to generate a radio frequency output;
- calculating a complex digital offset to digitally correct for local oscillator feedthrough of the amplifier, the complex digital offset includes an in-phase offset correction factor and a quadrature offset correction factor;
- and
- applying the complex digital offset to correct the amplitude signal component and the phase signal component.
3 more elements
A system comprising:
- a polar transmitter formed on a substrate, the polar transmitter configured to generate a radio frequency output from an amplitude signal component received at an amplitude input and a phase signal component received at a phase input, the polar transmitter including a variable gain amplifier configured to combine the amplitude signal component and the phase signal component and a power amplifier configured to amplify output of the variable gain amplifier;
- an antenna coupled to receive the radio frequency output from the polar transmitter;
- a processor formed on the substrate and coupled to the polar transmitter, the processor configured to provide the amplitude signal component to the amplitude input and to provide the phase signal component to the phase input, the processor comprising:
- a digital modulation circuit configured to generate a modulated digital signal including an initial in-phase signal component and an initial quadrature signal component for conversion to the amplitude signal component and the phase signal component;
- and
- a correction circuit configured to calculate a complex digital offset and apply the complex digital offset to correct the amplitude signal component and the phase signal component for local oscillator feedthrough of the variable gain amplifier, the complex digital offset includes an in-phase offset correction factor and a quadrature offset correction factor.
3 more elements
A circuit comprising:
- a polar transmitter module configured to generate a radio frequency output from an amplitude signal component received at an amplitude input and a phase signal component received at a phase input, the polar transmitter module including an amplifier configured to combine amplitude and phase signal components;
- a processor module coupled to the polar transmitter module, the processor module configured to provide the amplitude signal component to the amplitude input and to provide the phase signal component to the phase input, the processor module comprising:
- a modulation module configured to generate a modulated digital signal including an in-phase signal component and a quadrature signal component for conversion to the amplitude signal component and the phase signal component;
- and
- a correction module configured to calculate a complex digital offset and apply the complex digital offset to correct the amplitude signal component and the phase signal component for local oscillator feedthrough of the amplifier, the complex digital offset includes an in-phase offset correction factor and a quadrature offset correction fact.
2 more elements
Dependencies are inferred from the claim text.