Adaptive Power Amplifier Voltage Control in Low-Orbit Satellite Terminals
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Solution Overview
Problem
Low-orbit satellite networks face challenges in reducing power consumption of power amplifiers while maintaining communication system performance, as lowering the applied voltage to reduce power consumption leads to deteriorated linearity and performance degradation.
Innovation Solution
An apparatus and method for adaptively controlling a power amplifier in a low-orbit satellite network by communicating with a satellite, setting initial voltage and frequency, receiving orbit information, and updating the applied voltage based on the orbit information and network environment parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the applied voltage to the power amplifier is lowered to reduce power consumption, then power consumption is reduced, but linearity deteriorates and communication system performance decreases
Solution Approach 1:
The patent applies dynamics by making the power amplifier's operating state adjustable rather than fixed. The control unit dynamically changes the bias current and supply voltage of the power amplifier based on real-time communication conditions (data rate, signal quality, channel state). This allows the system to adapt between high linearity mode (when performance is critical) and low power consumption mode (when energy saving is prioritized), resolving the contradiction between fixed voltage operation and variable performance requirements.
Solution Approach 2:
The patent changes physical parameters of the power amplifier (bias current, supply voltage, operating point) based on communication conditions. By adjusting these parameters dynamically, the system can operate at different efficiency points on the power consumption-linearity curve. For example, when signal quality is good and data rate is low, the system reduces bias current and supply voltage to save power while maintaining acceptable linearity. When signal quality degrades or data rate increases, the system increases parameters to restore linearity and performance.
2Duration of action of moving object
If the applied voltage to the power amplifier is lowered to extend battery life, then duration of action is extended, but communication system performance deteriorates
Solution Approach 1:
The patent implements periodic monitoring and adjustment of power amplifier parameters based on communication conditions. The control unit periodically evaluates data rate, signal quality, and channel state, then adjusts bias current and supply voltage accordingly. This periodic action allows the system to maintain acceptable performance over extended periods by adapting to changing conditions, thereby extending effective battery life without permanently sacrificing communication performance.
Solution Approach 2:
The system dynamically adjusts power amplifier operating parameters to extend battery life while maintaining performance when needed. By making the power consumption adjustable rather than fixed, the system can operate in low-power mode during favorable conditions and switch to high-performance mode when communication reliability becomes critical, effectively extending usable battery life without permanent performance degradation.
Data Source
AI summary
According to an aspect of the present disclosure, there is provided a method of controlling a power amplifier in a low-orbit satellite network, the method comprising: communicating, by a terminal, with a satellite; setting an initial applied voltage and frequency; receiving orbit information from the satellite; and updating the initial applied voltage according to the orbit information and network environment.