Power Amplifier Peak Path Control 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, leading to excessive energy consumption, especially when signal Peak to Average Power Ratio (PAPR) varies significantly.
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 lookup table entries and interpolation based on the calculated PAPR, allowing adaptive operation and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power amplifier circuitry is calibrated with a fix target PAPR during production, then the peak power capability is ensured to meet maximum signal requirements, but the power consumption remains fixed at maximum level even when actual PAPR is lower
Solution Approach 1:
The patent implements dynamic adjustment of peak amplifier path configuration based on real-time PAPR measurement. The system transitions from static fixed calibration to dynamic adaptive operation, where the peak amplifier path is configured according to actual signal conditions. This resolves the contradiction by making the power consumption variable rather than fixed, ensuring maximum power capability when needed while reducing consumption during normal operation.
Solution Approach 2:
The system changes operational parameters (peak amplifier configuration) based on PAPR conditions. By measuring actual PAPR and adjusting peak amplifier path parameters accordingly, the system adapts its power consumption to match actual signal requirements rather than operating at fixed maximum levels, thus resolving the energy consumption issue while maintaining reliability.
2Adaptability or versatility
If the peak amplifier path is always configured for maximum peak power capability, then the transmitter can handle signals with high PAPR, but the power consumption is continuously high even when PAPR varies to lower levels
Solution Approach 1:
The system dynamically adjusts the peak amplifier path configuration based on real-time PAPR measurement. When PAPR is high, the peak amplifier is activated to handle the signal; when PAPR is low, the peak amplifier is deactivated or reduced. This dynamic behavior provides adaptability to varying PAPR conditions while avoiding continuous high power consumption.
Solution Approach 2:
The configuration parameters of the peak amplifier path are changed based on measured PAPR values. The system selects appropriate configuration parameters from a lookup table or uses interpolation to determine optimal settings, thereby adapting the PAPR handling capability to actual signal conditions without maintaining maximum configuration continuously, thus reducing power consumption.
3Reliability
If the power amplifier circuitry operates at maximum peak power capability continuously, then it can fulfill the maximum signal PAPR requirement, but the power consumption is highest and unnecessary when actual PAPR is lower
Solution Approach 1:
The system implements feedback by measuring the actual PAPR of the input signal and using this information to adjust the peak amplifier path configuration. This closed-loop control ensures that the power amplifier operates at appropriate power levels based on actual signal conditions, maintaining transmission reliability when needed while avoiding excessive energy consumption during normal operation.
Solution Approach 2:
The system changes operational parameters based on measured PAPR values. By selecting or interpolating configuration parameters from a lookup table according to actual PAPR conditions, the system adjusts its power consumption to match actual transmission requirements, thereby reducing energy loss while maintaining signal transmission reliability.
Data Source
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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.