RF Amplifier Power Supply Switching for ET Noise and Power Trade-Off
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Solution Overview
Problem
The use of envelope tracking (ET) method for supplying power to RF signal amplifiers in communication devices can lead to ET switching noise, degrading reception performance, while average power tracking (APT) mode increases power consumption.
Innovation Solution
A method is implemented to control power supply by switching between ET and APT modes based on conditions such as downlink block error rate and uplink resource allocation, optimizing power efficiency and reducing noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If envelope tracking (ET) method is used to supply power to the amplifier, then power efficiency is improved, but ET switching noise degrades reception performance
Solution Approach 1:
The patent implements dynamic switching between ET mode and APT mode based on real-time detection of uplink resource allocation. The system transitions from static power supply mode to dynamic mode selection, allowing it to adapt to varying communication conditions and optimize both power efficiency and reception performance根据不同场景
Solution Approach 2:
The patent introduces APT mode as an intermediary solution between full ET mode and traditional power supply. When ET switching noise would degrade reception performance, the system switches to APT mode which supplies power based on average power rather than instantaneous envelope, thereby eliminating the harmful switching noise while maintaining reasonable power efficiency
2Object-affected harmful factors
If average power tracking (APT) mode is used to supply power to the amplifier, then reception performance is improved, but power consumption increases
Solution Approach 1:
The system dynamically selects between APT mode and ET mode based on uplink resource allocation conditions. APT mode is activated only when full uplink resource blocks are allocated and ET switching noise would interfere with reception, while ET mode is used during other conditions, thereby optimizing the trade-off between reception performance and power consumption在不同工作场景下
Data Source
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AI summary
A method of controlling power supply for amplifying a radio frequency (RF) signal includes: determining whether a power supply mode for supplying power from a power modulator of a communication apparatus to an amplifier for amplifying the RF signal is an envelope tracking (ET) mode for supplying power based on ET of the RF signal; when the power supply mode is the ET mode, determining whether a downlink block error rate in the ET mode and a downlink modulation method in the ET mode satisfy a first condition; when the first condition is satisfied, determining whether a full resource block (RB) in an uplink band is allocated to uplink data transmission; and when the full RB in the uplink band is allocated to uplink data transmission, switching the power supply mode to an average power tracking (APT) mode for supplying power based on average power of the RF signal.