Common Voltage Booster for Multi-PA Timing Alignment
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Solution Overview
Problem
Mobile terminals face challenges in supporting multiple radio systems like 4G and 5G due to increased space requirements, power consumption, and control complexity, particularly in ensuring precise timing alignment for 5G communication systems.
Innovation Solution
A mobile terminal with a common RF front-end structure employing a first and second power amplifier, controlled by a voltage booster and a modem, which enables simultaneous voltage control and envelope tracking for improved timing alignment, allowing for efficient operation in both 4G and 5G systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power amplifiers are provided for 4G and 5G communication systems, then each system can operate independently, but deployment space increases and device complexity increases
Solution Approach 1:
The patent merges the power supply control functions for multiple power amplifiers into a single controller that manages all power amplifiers centrally. This consolidation reduces the number of separate control units needed, thereby reducing deployment space and device complexity while maintaining independent operation capability through software-based control
Solution Approach 2:
The controller is designed with universal functionality to manage multiple power amplifiers for different communication systems (4G, 5G) simultaneously. This multi-functional approach allows a single device to handle multiple tasks that previously required separate dedicated components, reducing overall device complexity
2Reliability
If separate power amplifiers are provided for 4G and 5G communication systems, then each system can operate independently, but control complexity increases
Solution Approach 1:
The patent combines multiple separate power supply control functions into a single integrated controller that manages all power amplifiers. This merging of control functions simplifies the overall control architecture, reducing power supply control complexity while maintaining the ability to independently operate different communication systems through unified control logic
3Productivity
If multiple power amplifiers are used for UL MIMO in 5G system, then transmission capability is improved, but timing alignment error between channels increases
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors the timing alignment between channels and dynamically adjusts the power supply to each power amplifier accordingly. This closed-loop control ensures that timing alignment errors are maintained below threshold levels while allowing multiple power amplifiers to operate for enhanced transmission capability
Solution Approach 2:
The controller dynamically changes power supply parameters (voltage, timing) for each power amplifier based on real-time channel conditions and timing alignment requirements. By adjusting these parameters, the system maintains precise timing alignment across multiple channels while preserving the transmission benefits of using multiple power amplifiers
Data Source
AI summary
A mobile terminal includes a first power amplifier configured to amplify and output a first signal of a 5G communication system; a first antenna connected to the first power amplifier and configured to transmit the first signal amplified and output from the first power amplifier as a first transmission signal; a second power amplifier configured to amplify and output a second signal of the 5G communication system; a second antenna connected to the second power amplifier and configured to transmit the second signal amplified and output from the second power amplifier as a second transmission signal; and a power controller connected to the first power amplifier and the second power amplifier and including a common voltage booster configured to provide a supply voltage to both of the first power amplifier and the second power amplifier at a same timing.