Envelope Branch Transmitter Interference Reduction via Adaptive Delay
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Solution Overview
Problem
Envelope branch type transmitters experience interference due to delay mismatch between signal and envelope branches, leading to distortion and unwanted spectral components, which cannot be adequately reduced with a single fixed delay compensation value, necessitating improved interference reduction methods.
Innovation Solution
A method and apparatus for determining a target frequency span and configuring a differential delay between the signal and envelope branches of an envelope branch type transmitter to reduce interference, allowing for adaptive delay compensation based on specific frequency spans.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single fixed delay compensation value is applied, then the complexity of the system is reduced, but interference in certain frequency ranges cannot be sufficiently reduced
Solution Approach 1:
The patent implements dynamic delay compensation by adjusting the delay value based on the operating frequency. Instead of using a single fixed delay compensation value, the system dynamically selects or adjusts the delay compensation value according to the current frequency of operation, thereby adapting to different frequency characteristics and reducing interference effectively across multiple frequency ranges without requiring overly complex multi-branch architectures
Solution Approach 2:
The patent changes the delay compensation parameter based on frequency. By making the delay compensation value a variable parameter that depends on the operating frequency rather than a fixed constant, the system achieves better interference reduction performance across different frequency ranges while maintaining reasonable system complexity
2Object-affected harmful factors
If high accuracy delay balance is applied, then interference reduction is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The patent employs feedback mechanisms to automatically adjust and optimize delay compensation. By using feedback from the system performance (interference levels, signal quality) to automatically tune the delay compensation value, the system achieves high accuracy delay balance without requiring manual measurement and adjustment, thereby reducing the difficulty of detecting and measuring delay mismatch while maintaining effective interference reduction
3Object-affected harmful factors
If adaptive delay configuration based on frequency span is applied, then interference reduction across different frequency ranges is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic delay configuration where the delay compensation value is adjusted based on the detected or predetermined frequency span. This dynamic adaptation allows the system to optimize interference reduction for different frequency ranges without requiring separate fixed delay lines for each frequency band, thereby achieving adaptive performance with moderate complexity increase
Solution Approach 2:
The patent changes the delay compensation parameter based on the frequency span characteristics. By making the delay value a function of the frequency span rather than a fixed parameter, the system achieves adaptive interference reduction across different frequency ranges while using a single configurable parameter set, avoiding the need for multiple complex delay adjustment mechanisms
Data Source
AI summary
Measures for interference reduction for an envelope branch type transmitter. Such measures may include determination of a target frequency span for reducing interference caused by an envelope branch type transmitter, and configuration of a differential delay between a signal branch and an envelope branch of the envelope branch type transmitter on the basis of the determined target frequency span.