Dynamic PA Supply Voltage Control for 5G Transmit Power
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Solution Overview
Problem
Existing technologies face challenges in efficiently managing transmit power in 5G networks due to varying subcarrier spacings, leading to inefficiencies in power amplifier performance.
Innovation Solution
The electronic device dynamically adjusts the supply voltage for the power amplifier based on control information from the base station, switching voltage values to match the transmit power requirements for different subcarrier spacings, ensuring optimal power amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the supply voltage for the power amplifier is fixed, then the device complexity is reduced, but the power amplifier efficiency deteriorates due to inability to adapt to different subcarrier spacings
Solution Approach 1:
The supply voltage for the power amplifier is changed from a fixed value to a dynamically switchable value based on the subcarrier spacing being used. The processor determines the appropriate voltage level and switches the supply voltage accordingly, allowing the power amplifier to adapt its operating characteristics to match different subcarrier spacing requirements (15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz), thereby improving efficiency without requiring a completely new amplifier for each scenario
Solution Approach 2:
The invention changes the operating parameter (supply voltage) of the power amplifier based on the subcarrier spacing configuration. Different voltage levels are assigned to different subcarrier spacing values, allowing the system to optimize power amplifier performance for each specific subcarrier spacing scenario. This parameter adaptation resolves the contradiction by enabling versatility through controlled parameter variation rather than through hardware complexity
2Loss of energy
If the supply voltage is switched frequently to match transmit power requirements, then the power amplifier efficiency is improved, but the power consumption increases due to voltage switching operations
Solution Approach 1:
The supply voltage is switched in advance before the actual data transmission begins. The processor determines the required voltage level based on the subcarrier spacing and switches the voltage during the uplink grant reception phase or before the uplink transmission slot starts. This preliminary action ensures the power amplifier is properly configured before transmission, improving efficiency while minimizing the frequency of voltage switching to only when conditions change
Solution Approach 2:
The voltage switching occurs periodically based on changes in subcarrier spacing configuration rather than continuously during transmission. Once the voltage is set for a particular subcarrier spacing, it remains stable until the subcarrier spacing changes. This periodic switching approach reduces unnecessary voltage transitions and associated power consumption while maintaining optimal power amplifier operation during each transmission phase
3Reliability
If the voltage switching timing is delayed, then the communication quality is improved, but the transmit power accuracy deteriorates due to insufficient preparation time
Solution Approach 1:
The voltage switching is performed in advance during the uplink grant reception phase or before the uplink transmission slot begins, ensuring the power amplifier has sufficient time to stabilize at the new voltage level before actual data transmission. This preliminary voltage configuration ensures both accurate transmit power output and stable communication quality without rushing the switching process
Solution Approach 2:
The system automatically determines the appropriate voltage level and switching timing based on the subcarrier spacing configuration without requiring external intervention. The processor monitors the subcarrier spacing and autonomously controls the voltage switching to occur at the optimal moment that balances power accuracy and communication quality requirements
Data Source
AI summary
An electronic device include an antenna, a power amplifier and at least one processor configured to identify, transmit power of user data to be transmitted within a first slot in which uplink transmission is initiated; switch, based on identifying that the user data is transmitted based on a first SCS, supply voltage for dynamic range of the PA to a voltage value corresponding to the Tx power; switch, based on identifying that the user data is transmitted based on a second SCS greater than the first SCS, the supply voltage to the voltage value, within second duration in the second slot, the second duration in the second slot being before an initiation of the first slot; and transmit, using the PA, the user data with the Tx power within the first slot, to the base station.