Power Amplifier Peak Path Tuning for Variable PAPR Signals
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Solution Overview
Problem
Conventional power amplifier circuitries in wireless communication systems operate at maximum peak power capability and highest power consumption due to fixed calibration, which is inefficient when signal Peak to Average Power Ratio (PAPR) varies significantly, leading to excessive energy consumption.
Innovation Solution
A method and apparatus that adjust the peak power capability of power amplifier circuitry by calculating the PAPR of an input signal and configuring the peak amplifier path using determined configuration parameters, such as supply voltage, attenuation, and phase offset, stored in a lookup table, to optimize power consumption and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power amplifier circuitry operates at maximum peak power capability with fixed calibration, then the transmitter can fulfill the maximum signal PAPR requirement, but the power consumption is always at highest level leading to excessive energy consumption
Solution Approach 1:
The patent applies dynamics by making the power amplifier circuitry's operating status adjustable rather than fixed. The system dynamically adapts the peak power capability based on the actual PAPR of the input signal by configuring the peak amplifier path according to different operating conditions, allowing the transmitter to operate at optimal power levels rather than always at maximum capability
Solution Approach 2:
The patent changes the operating parameters of the power amplifier circuitry based on the calculated PAPR of the input signal. By determining configuration parameters (such as attenuation values, phase offsets, or gain settings) depending on the PAPR, the system adjusts the peak power capability to match actual signal requirements, thereby reducing power consumption when maximum peak power is not needed
2Manufacturing precision
If the power amplifier circuitry is calibrated individually with a fix target PAPR during production, then the peak power capability is optimized for that specific PAPR, but the power consumption remains fixed and cannot adapt when signal PAPR varies significantly
Solution Approach 1:
The patent transforms the static calibration approach into a dynamic adaptation mechanism. Instead of fixing the calibration for a single target PAPR, the system continuously or periodically determines configuration parameters based on the actual input signal PAPR, enabling the power amplifier to adapt to varying signal conditions while maintaining optimal performance
Solution Approach 2:
The patent implements feedback by calculating the PAPR of the input signal and using this information to determine the configuration parameters of the peak amplifier path. This closed-loop approach allows the system to sense the actual signal characteristics and adjust the amplifier configuration accordingly, achieving adaptability across different PAPR conditions
Data Source
AI summary
One of the embodiments of the present disclosure relates to a method for adjusting peak power capability of a power amplifier circuitry. The power amplifier circuitry comprises at least one main amplifier path and at least one peak amplifier path and is configured to output a signal combining amplified signals from the at least one main amplifier path and the at least one peak amplifier path. The method comprises calculating a PAPR of an input signal of the power amplifier circuitry; determining at least one configuration parameter of the at least one peak amplifier path depending upon the calculated PAPR of the input signal; and configuring the at least one peak amplifier path based on the determined at least one configuration parameter, thereby adjusting the peak power capability of the power amplifier circuitry. The present disclosure also relates to corresponding apparatus and wireless communication devices.