US Patent Application 18159604. Radio-frequency Amplifier with Load Response Estimation simplified abstract
Contents
Radio-frequency Amplifier with Load Response Estimation
Organization Name
Inventor(s)
Stephan Henzler of Munich (DE)
Radio-frequency Amplifier with Load Response Estimation - A simplified explanation of the abstract
This abstract first appeared for US patent application 18159604 titled 'Radio-frequency Amplifier with Load Response Estimation
Simplified Explanation
The patent application describes an electronic device with wireless circuitry that includes a processor, upconversion circuit, power amplifier, antenna, and transmit filter.
- The wireless circuitry generates baseband signals and upconverts them to radio-frequency signals.
- The transmit filter has a frequency dependent filter response and is connected between the power amplifier and the antenna.
- To mitigate the filter response, the device includes predistortion circuitry.
- The predistortion circuitry includes an amplifier load response estimator that models the filter response and an amplifier non-linearity estimator that models the non-linear behavior of the amplifier.
- A control signal generator adjusts the power amplifier based on the estimations from the load response estimator and non-linearity estimator.
Original Abstract Submitted
An electronic device may include wireless circuitry with a processor that generates baseband signals, an upconversion circuit that upconverts the baseband signals to radio-frequency signals, a power amplifier, an antenna, and a transmit filter with a frequency dependent filter response coupled between the output of the power amplifier and the antenna. To help mitigate the frequency dependent filter response, the wireless circuitry may further include predistortion circuitry having an amplifier load response estimator that implements a baseband model of the filter response, an amplifier non-linearity estimator that models the non-linear behavior of the amplifier, and a control signal generator for adjusting the power amplifier based on the output of the amplifier load response estimator and the amplifier non-linearity estimator.
