GaN Power Amplifier Symbol Compensation for Trapping Effects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
GaN power amplifiers suffer from the trapping effect due to impurities and defects, which affects their performance by causing current collapse, gain, and phase response issues, and existing solutions like GaN boosters or additional circuits either degrade power efficiency or increase costs.
Innovation Solution
A method and apparatus for power amplifier compensation that determines compensation values for various power ranges and updates them based on received symbols, using a look-up table to adjust transmission symbols and compensate for the trapping effect without requiring a GaN booster or additional hardware, thus maintaining power efficiency and improving performance for dynamic waveforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a GaN booster solution is used to compensate for trapping effect, then the trapping effect is mitigated, but power efficiency is significantly degraded
Solution Approach 1:
The patent changes the operational parameters (back-off value and IDS) dynamically based on temperature levels rather than using a fixed GaN booster configuration. By adjusting these parameters in real-time, the system compensates for trapping effects while optimizing power efficiency at each temperature condition.
Solution Approach 2:
The system transitions from a static GaN booster approach to a dynamic parameter adjustment mechanism. The back-off value and IDS are continuously adapted based on temperature feedback, allowing the system to respond to trapping effects as they occur while maintaining optimal power efficiency.
2Reliability
If a Diode based Phase Modulator circuit is used as pre-correction circuit, then gain and phase offset are pre-corrected, but device complexity and cost increase
Solution Approach 1:
The patent extracts the correction function from complex hardware circuits and implements it through software-based parameter adjustment. By removing the need for additional physical correction circuits, the system achieves gain and phase compensation while reducing device complexity and cost.
Solution Approach 2:
The patent replaces the mechanical/electrical correction circuit (Diode based Phase Modulator) with a software-based parameter adjustment system. This substitution eliminates complex hardware while achieving the same correction function through digital signal processing and parameter optimization.
3Reliability
If additional correction circuits are added to compensate for trapping effect, then performance is improved, but manufacturing cost increases
Solution Approach 1:
The patent makes the existing power amplifier system perform multiple functions by enabling dynamic parameter adjustment for trapping effect compensation. Instead of adding separate correction circuits, the system uses the same hardware with enhanced control capabilities, achieving cost-effective multi-functionality.
Solution Approach 2:
The patent uses software-based parameter tables (TCT) to store and apply correction data, replacing the need for physical correction circuits. This virtual copying of correction functionality through data structures eliminates manufacturing costs associated with additional hardware components.
Data Source
AI summary
The present disclosure provides a method (200) for power amplifier compensation. The method (200) includes: determining (210) a compensation value for each of a plurality of power ranges; determining (220) one of the plurality of power ranges to which transmission power of an initial symbol belongs; and compensating (230) the initial symbol with the compensation value for the one power range to obtain a compensated symbol. for transmission after passing through a power amplifier.