Amplifier Distortion Compensation Using Dynamic Multi-Model Blending
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Solution Overview
Problem
Existing methods for compensating distortion in amplifiers with varying internal states, such as those experiencing Idq drift, fail to appropriately express and adjust distortion compensation characteristics, leading to ineffective distortion compensation.
Innovation Solution
A distortion compensation device and method that utilize a combination of multiple calculation models with distinct distortion compensation characteristics for different internal states, combined using a dynamic ratio based on the current internal state, allowing for adaptive distortion compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single distortion compensation model is used for an amplifier with varying internal states, then the device complexity is reduced, but the distortion compensation accuracy deteriorates because the model cannot adapt to changing internal states
Solution Approach 1:
The distortion compensation model is segmented into multiple calculation models, each corresponding to a specific internal state of the amplifier. Instead of using a single model, the system divides the compensation function across multiple specialized models that can be selectively applied based on the current internal state, thereby maintaining accuracy without excessive complexity
Solution Approach 2:
The distortion compensation model transitions from a static single-model approach to a dynamic multi-model system. The combiner dynamically adjusts the combination ratio between different calculation models based on the varying internal state of the amplifier, allowing the system to adapt in real-time and maintain compensation accuracy throughout operation
2Measurement precision
If multiple calculation models are combined with dynamic ratio adjustment, then the distortion compensation accuracy is improved, but the device complexity increases due to the need for state monitoring and combination control
Solution Approach 1:
The combiner component performs multiple functions: it monitors the internal state of the amplifier, selects appropriate calculation models, determines the combination ratio, and executes the weighted combination. This multi-functionality reduces the need for separate dedicated components for each task, thereby managing complexity while achieving high compensation accuracy
Solution Approach 2:
The combiner acts as an intermediary between the multiple calculation models and the final distortion compensation output. It mediates the interaction between different models by dynamically weighting their contributions based on internal state, simplifying the overall system architecture while maintaining the benefits of multiple specialized models
Data Source
AI summary
Provided is a distortion compensation device performing distortion compensation on a signal to be amplified by an amplifier, of which an internal state affecting a distortion characteristic varies, using a distortion compensation model, wherein the distortion compensation model includes a plurality of calculation models having respective distortion compensation characteristic for the amplifier in different internal states, and a combiner combining the plurality of calculation models at a combination ratio corresponding to the internal state that varies.