Amplifier Distortion Compensation with State-Based Parameter Updates
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Solution Overview
Problem
Conventional distortion compensator apparatuses and methods face challenges in achieving both high linearity and reduced power consumption for power amplifiers, as updating compensation values or coefficients requires power consumption and is not efficiently managed.
Innovation Solution
A distortion compensator apparatus that includes a memory for storing compensation parameters, a signal corrector using these parameters to compensate input signals, and an update controller that adjusts these parameters based on the amplifier's operation state, allowing for independent timing of amplitude and phase characteristic updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If compensation parameters are frequently updated to maintain amplifier linearity, then linearity is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic update of compensation parameters based on the amplifier's operation state. The update controller monitors whether the amplifier is in a linear or non-linear region and selectively updates compensation parameters only when necessary (when transitioning to non-linear region), rather than continuously updating. This dynamic approach maintains linearity when needed while minimizing unnecessary updates that would consume power.
Solution Approach 2:
The patent changes the update frequency and timing of compensation parameters based on the amplifier's operating conditions. By detecting the operation state (linear vs. non-linear region) and adjusting the update strategy accordingly, the system optimizes the balance between maintaining linearity and reducing power consumption through selective parameter updates.
2Use of energy by moving object
If compensation parameters are updated based on operation state, then power consumption is reduced, but linearity may deteriorate if updates are delayed
Solution Approach 1:
The patent employs feedback mechanisms where the update controller continuously monitors the amplifier's operation state and the compensation parameters. When the amplifier transitions from a linear to a non-linear region, the feedback signal triggers an update of compensation parameters. This feedback-based approach ensures linearity is maintained by updating only when the operation state changes, avoiding both excessive updates and dangerous delays.
3Manufacturing precision
If separate update timing is used for amplitude and phase characteristics, then compensation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the update control for amplitude and phase characteristics into independent processes. The update controller can determine and update amplitude compensation parameters and phase compensation parameters at different timings based on their respective needs. This segmentation allows optimized update strategies for each characteristic type, improving overall compensation accuracy while managing complexity through modular control.
Data Source
AI summary
This distortion compensator apparatus is a distortion compensator apparatus compensating nonlinearity of an amplifier and includes: a memory storing a compensation parameter used for correcting an input signal of the amplifier; a compensator correcting the input signal of the amplifier based on the compensation parameter; and an update controller updating the compensation parameter according to an operation state of the amplifier.