Power Amplifier Supply Tracking for Variable 5G Carrier Bandwidth
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Solution Overview
Problem
Existing electronic devices face inefficiencies in power control when transmitting signals across various bandwidths, particularly due to the use of a fixed power control mode regardless of the bandwidth selected based on information from a base station, leading to suboptimal performance in 5G communication systems.
Innovation Solution
An electronic device is configured with a communication processor that determines whether the carrier bandwidth and signal power exceed threshold values, allowing it to select between envelope tracking (ET) or average power tracking (APT) modes for power control, optimizing power supply to the power amplifier based on the selected mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed power control mode is used regardless of bandwidth, then device complexity is reduced, but power control efficiency deteriorates
Solution Approach 1:
The patent implements dynamic power control mode selection where the system automatically switches between envelope tracking (ET) mode and average power tracking (APT) mode based on the current bandwidth conditions. The communication processor determines the appropriate mode by evaluating bandwidth thresholds, ensuring the power control system adapts to varying transmission requirements rather than using a fixed mode, thereby resolving the contradiction between system complexity and control efficiency.
Solution Approach 2:
The system changes the power control mode parameter based on bandwidth conditions. When the bandwidth exceeds a first threshold value, the system selects ET mode; otherwise, it selects APT mode. This parameter change approach allows the power control system to optimize its performance according to the specific transmission bandwidth, improving power control efficiency without requiring overly complex manual configuration.
2Measurement precision
If envelope tracking mode is used for all bandwidths, then power control precision is improved, but energy consumption increases
Solution Approach 1:
The patent applies different power control modes to different bandwidth conditions. ET mode, which provides higher power control precision, is applied only when the bandwidth exceeds the first threshold value. For smaller bandwidths, APT mode is used instead. This local quality approach ensures that the higher energy-consuming ET mode is utilized only where necessary, optimizing the balance between power control precision and energy consumption.
Solution Approach 2:
The system uses ET mode partially - only when bandwidth conditions require it - rather than applying it excessively across all operating conditions. By conditionally selecting ET mode based on bandwidth thresholds, the system achieves adequate power control precision only when needed, thereby reducing unnecessary energy consumption while maintaining sufficient control accuracy for the specific transmission requirements.
3Use of energy by moving object
If average power tracking mode is used for all bandwidths, then energy consumption is reduced, but power control precision deteriorates
Solution Approach 1:
The patent applies APT mode, which consumes less energy, to scenarios where bandwidth is below the first threshold value. However, when bandwidth exceeds the threshold, the system switches to ET mode to maintain adequate power control precision. This local quality approach ensures that energy consumption is optimized for low-bandwidth scenarios while precision is maintained for high-bandwidth scenarios.
Solution Approach 2:
The system uses APT mode partially - only when bandwidth conditions allow - rather than applying it excessively across all operating conditions. By conditionally selecting APT mode for lower bandwidths, the system achieves energy efficiency where sufficient precision can be maintained, while reserving ET mode for scenarios where higher precision is required, thus avoiding excessive energy consumption overall.
4Reliability
If power control mode is optimized for low-frequency band, then performance in low-frequency band is improved, but performance in high-frequency band deteriorates
Solution Approach 1:
The patent implements a dynamic power control mode selection mechanism that adapts to different bandwidth conditions. The communication processor evaluates the current bandwidth and selects the appropriate power control mode (ET or APT) accordingly. This dynamic approach ensures that the system maintains reliable power control performance across both low-frequency and high-frequency bands, resolving the contradiction between optimized performance for a specific band and adaptability across multiple bands.
Solution Approach 2:
The power control system is designed to be universal by supporting multiple power control modes (both ET and APT) and automatically selecting the appropriate mode based on bandwidth conditions. This multi-functionality allows the system to perform effectively across different frequency bands and bandwidth scenarios, rather than being optimized for only one specific band, thereby achieving both reliable performance and broad adaptability.
Data Source
AI summary
According to various embodiments, an electronic device includes: a communication processor, a transceiver which is electrically connected to the communication processor, a first power amplifier which is electrically connected to the transceiver; a first antenna which is electrically connected to the first power amplifier; and a first supply adjustor which is electrically connected to the communication processor and the first power amplifier, wherein the communication processor can be set to perform a first determination about whether a first carrier bandwidth part (BP) of a first signal transmitted through the first antenna exceeds a first threshold value, perform a second determination about whether the power of the first signal exceeds a second threshold value, select a first tracking mode as an envelope tracking (ET) mode or an average power tracking (APT) mode on the basis of at least a portion of the first determination and the second determination, and control the first supply adjustor using the selected first tracking mode.