Amplifier Output Power Regulation Across Open- and Closed-Loop Control
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Solution Overview
Problem
In mobile data transmission systems, existing methods for regulating amplifier stage output power are inadequate, particularly in UMTS standards, as they fail to ensure accurate and continuous power adjustments without affecting transmission quality or exceeding maximum power limits, especially when transitioning between open-loop and closed-loop control.
Innovation Solution
An apparatus and method that include a power detector, a regulating unit generating a power correction signal, and a limiter that sets a controlling range for the amplifier stage, allowing for seamless transitions between open-loop and closed-loop power regulation by combining power correction and setting signals to prevent excessive power jumps and ensure adherence to predefined tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If closed-loop power regulation is implemented to ensure accurate power monitoring and adjustments, then transmission quality is improved, but device complexity increases due to the additional feedback loop and power detector components
Solution Approach 1:
The patent implements a closed-loop power regulation system where a power detector monitors the actual output power of the amplifier stage and feeds this information back to a regulating unit. This feedback mechanism enables continuous monitoring and adjustment of the power output, ensuring transmission quality remains within required tolerances while providing reliable power control in mobile terminal devices.
2Adaptability or versatility
If the amplifier stage operates over the entire dynamic range of more than 70 dB, then adaptability is improved, but power regulation accuracy deteriorates when transitioning between open-loop and closed-loop control modes
Solution Approach 1:
The patent employs a dynamic power regulation system that can switch between open-loop and closed-loop control modes depending on operating conditions. The system adapts its regulation strategy based on the current power level and transmission requirements, allowing it to operate effectively across the entire 70 dB dynamic range while maintaining power regulation accuracy through appropriate mode selection and transition management.
3Adaptability or versatility
If power correction signals are allowed to have large values to compensate for power deviations, then power regulation range is improved, but transmission quality deteriorates due to excessive power jumps affecting other connections
Solution Approach 1:
The patent applies preliminary anti-action by implementing a limiter that constrains the maximum value of power correction signals before they are applied to the amplifier stage. This prevention mechanism ensures that power corrections remain within acceptable limits, avoiding excessive power jumps that would disrupt other connections sharing the same channel, while still allowing sufficient regulation range to maintain transmission quality within predefined tolerances.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively regulates amplifier output power within defined ranges, preventing discontinuities and ensuring continuous transmission quality by limiting power correction signals based on the amplifier's regulating range, thus maintaining optimal transmission performance and adhering to UMTS standards.
Implementation Method 1
a power detector (109) to sense an output power value (108) of the amplifier stage (103)
Data Source
AI summary
The present invention relates to a device and a method for regulating the output power of an amplifier stage, e.g. an amplifier stage in a mobile data transmission system.