TDD Power Amplifier Voltage Switching for Variable RF Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices in time division duplex (TDD) schemes face inefficiencies in power amplification due to fixed voltage supply to power amplifiers, leading to reduced power efficiency and increased power consumption, especially when amplifying signals with varying average power levels.
Innovation Solution
The electronic device incorporates a processor that manages a crest factor reduction (CFR) module, digital predistortion (DPD) module, and power supply to dynamically adjust states based on voltage information and scheduling, allowing for variable voltage supply to the power amplifier, optimizing power usage and linearity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If fixed voltage supply is used to the power amplifier, then the device structure is simple and stable, but power efficiency is reduced and power consumption increases
Solution Approach 1:
The patent implements dynamic voltage supply to the power amplifier by switching between first and second voltage levels based on the average power of uplink signals. The power supply unit changes the voltage level according to signal characteristics, transforming the static power supply system into a dynamic one that adapts to varying transmission conditions, thereby improving power efficiency without excessive complexity
Solution Approach 2:
The patent changes the voltage parameter of the power supply based on the average power of the uplink signal. By adjusting the voltage level (first voltage for high average power, second voltage for low average power), the system optimizes the operating point of the power amplifier to match signal conditions, resolving the contradiction between power efficiency and device complexity
2Use of energy by moving object
If fixed voltage supply is used to the power amplifier, then the system is stable and easy to control, but power consumption increases
Solution Approach 1:
The processor calculates the average power of uplink signals and uses this information to control the power supply unit's voltage output. This feedback mechanism allows the system to automatically adjust power consumption based on actual transmission needs while maintaining straightforward control through processor-based decision making
Solution Approach 2:
The system dynamically adjusts voltage supply based on signal average power conditions, enabling the power amplifier to operate at optimal efficiency points. The control logic remains simple: compare average power threshold and switch voltage levels, maintaining ease of operation while reducing power consumption
3Reliability
If the power amplifier operates at high voltage for all transmission intervals, then signal transmission reliability is ensured, but power efficiency is reduced
Solution Approach 1:
The patent changes the voltage parameter based on the average power of the transmitted signal. When average power is high, first voltage is applied to ensure reliable transmission; when average power is low, second voltage is used to improve power efficiency. This parameter adaptation resolves the contradiction between reliability and energy efficiency
Solution Approach 2:
The power supply system dynamically adapts voltage levels to match transmission conditions. By making the voltage supply conditional on signal characteristics rather than fixed, the system achieves both reliability when needed and efficiency when possible, eliminating the need to always operate at high voltage
Data Source
AI summary
An electronic device may include: a processor; a power amplifier; a power supply configured to supply power to the power amplifier; a crest factor reduction (CFR) module; and a digital predistortion (DPD) module, wherein the processor is configured to: transmit a first radio frequency (RF) signal, based on a first state of each of the CFR module, the DPD module, and the power supply, in a first transmission interval, the first RF signal being generated from a first baseband signal; identify voltage information of a second RF signal associated with a second transmission interval after the first transmission interval; change a state of each of the CFR module, the DPD module, and the power supply from the first state to a second state, based on the voltage information, in a first reception interval between the first transmission interval and the second transmission interval; and transmit the second RF signal generated from a second baseband signal based on the second state of each of the CFR module, the DPD module, and the power supply, in the second transmission interval.