Envelope Tracking PA Bias Control for 5G Bandwidth Adaptation
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Solution Overview
Problem
Conventional wireless communication systems, particularly in 5G networks, face challenges in managing power consumption and system stabilization due to the higher bandwidth requirements, which existing technologies like envelope tracking (ET), digital pre-distortion (DPD), and crest factor reduction (CFR) do not adequately address.
Innovation Solution
An electronic device with a network monitor to acquire environment information, a transceiver to generate an envelope signal, and an ET modulator that adjusts the power amplifier's bias based on network conditions to optimize RF transmission signals, incorporating a linear regulator and switching converter for efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If envelope tracking (ET), digital pre-distortion (DPD), or crest factor reduction (CFR) are used in conventional wireless communication systems, then data rate is improved, but power consumption increases and system stabilization becomes difficult in high-bandwidth 5G environments
Solution Approach 1:
The patent implements dynamic parameter adjustment in the ET modulator based on network environment information. The bias magnitude of the power amplifier is dynamically changed according to bandwidth conditions (e.g., 10MHz, 20MHz, 40MHz, 80MHz, 100MHz), allowing the system to adapt to varying 5G network requirements while optimizing power consumption and maintaining system stability
Solution Approach 2:
The patent changes the bias parameter of the power amplifier based on network environment information. By adjusting the bias magnitude according to different bandwidth scenarios, the system optimizes the trade-off between data rate performance and power consumption, enabling efficient operation in high-bandwidth 5G environments
2Device complexity
If limited parameters are used in conventional wireless communication systems, then device complexity is reduced, but adaptability to high-bandwidth 5G network environments deteriorates
Solution Approach 1:
The system dynamically adjusts the bias parameter based on detected network environment information including bandwidth (10MHz, 20MHz, 40MHz, 80MHz, 100MHz). This dynamic adaptation enables the system to handle various 5G bandwidth scenarios without requiring completely different system configurations
Solution Approach 2:
The ET modulator is designed with multi-functionality to handle different bandwidth scenarios (10MHz to 100MHz) using a single device structure. By incorporating network environment detection and dynamic parameter adjustment, the system achieves universal adaptability across various 5G network conditions without requiring separate specialized systems for each bandwidth
Data Source
AI summary
An electronic device includes a network monitor configured to acquire network environment information related to a radio frequency (RF) transmission signal; a transceiver configured to generate an envelope signal of the RF transmission signal; a transmission (Tx) module including a power amplifier for receiving the RF transmission signal from the transceiver and amplifying the RF transmission signal; and an envelope tracking (ET) modulator configured to receive the envelope signal from the transceiver and to provide a bias of a power amplifier to correspond to the envelope signal, wherein the ET modulator determines a magnitude of the bias of the power amplifier based on the network environment information acquired by the network monitor.