Analog RF pre-distorter and non-linear splitter
AssigneeInfineon Technologies AG
InventorsPeter Singerl, Thomas Magesacher, Martin Mataln
Life of this patent
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Abstract
An RF transmitter arrangement using analog pre-distortion is disclosed. The arrangement includes lower bandwidth circuitry, an analog pre-distorter, and a non-linear amplifier chain. The lower bandwidth circuitry is configured to generate an analog signal. The analog pre-distorter is configured to apply a non-linear distortion to the analog original signal based on a coupled feedback signal in order to generate an RF output signal. The non-linear amplifier chain is configured to amplify the RF output signal to generate a transmission signal relative to the analog original signal. The coupled feedback signal is derived from the transmission signal.
Claims18
An RF transmitter arrangement using analog pre-distortion, the arrangement comprising:
- an analog IQ processor configured to apply a non-linear distortion to an analog original signal based on one or more non-linear splines to generate an RF output signal;
- a spline generator configured to generate the one or more non-linear splines based on an envelope of the analog original signal and one or more pre-distortion parameters;
- a parameter generator configured to generate the one or more pre-distortion parameters based on the envelope and a coupled feedback signal;
- and
- a non-linear amplifier chain configured to amplify the RF output signal to generate a transmission signal relative to the analog original signal, wherein the coupled feedback signal is derived from the transmission signal.
An RF transmitter arrangement using analog pre-distortion, the arrangement comprising:
- an analog IQ processor configured to generate an RF signal from an analog original signal based on one or more non-linear splines;
- an envelope detector configured to obtain an envelope of the analog original signal;
- a spline generator configured to generate the non-linear splines based on the envelope and pre-distortion parameters;
- a parameter generator configured to generate the pre-distortion parameters based on the envelope and a coupled feedback signal;
- and
- a non-linear power amplifier configured to generate a transmission signal from the RF signal.
A method of operating an analog pre-distorter, the method comprising:
- converting and mixing a digital baseband signal to generate an analog original signal without increasing a spectrum;
- applying a non-linear pre-distortion to the analog original signal in an analog domain according to one or more non-linear functions to generate a distorted RF signal;
- generating one or more predistortion parameters based on an envelope of the analog original signal and a coupled feedback signal;
- generating the one or more non-linear functions based on the envelope of the analog original signal and the one or more pre-distortion parameters;
- and
- amplifying the distorted RF signal with a non-liner amplifier to generate a transmission signal.
Dependencies are inferred from the claim text.