Envelope Tracking Bias Control for 5G Power Amplifiers
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Solution Overview
Problem
Conventional wireless communication systems, particularly in 5G networks, face challenges in managing power consumption and system stability due to the need for higher bandwidths, 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 this information 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 higher bandwidth is used in 5G network environment, then data rate is improved, but power consumption increases and system stability deteriorates
Solution Approach 1:
The patent implements dynamic envelope tracking by continuously adjusting the power amplifier's operating point to match the instantaneous envelope of the RF signal. The ET modulator dynamically varies the bias voltage applied to the power amplifier based on the envelope signal, enabling the system to adapt to changing bandwidth requirements and power consumption conditions in real-time, thus resolving the contradiction between high data rate and power consumption in 5G networks
Solution Approach 2:
The patent changes the operating parameters of the power amplifier by applying envelope-tracking bias voltage that corresponds to the signal envelope. This parameter adjustment allows the power amplifier to operate efficiently across different bandwidth scenarios, maintaining system stability while supporting higher data rates through optimized power delivery
2Productivity
If higher bandwidth is used in 5G network environment, then data rate is improved, but system stability deteriorates
Solution Approach 1:
The patent employs feedback mechanisms where the envelope signal, derived from the RF transmission signal, is used to control the biasing of the power amplifier. This closed-loop approach ensures that the power amplifier's operating conditions are continuously adjusted to maintain stability, even when operating at higher bandwidths required for enhanced data rates in 5G networks
Solution Approach 2:
The dynamic adjustment of power amplifier bias through envelope tracking enables the system to maintain stability across varying bandwidth conditions. By continuously adapting the operating point to match signal characteristics, the system remains stable while supporting the higher data rates demanded by 5G network environments
3Use of energy by moving object
If conventional ET, DPD, or CFR technologies are used, then power consumption is reduced, but they do not adequately address high bandwidth scenarios
Solution Approach 1:
The patent enhances the universality of envelope tracking technology by implementing a bandwidth-adaptive ET modulator that can effectively operate across diverse bandwidth scenarios. The system maintains its power consumption benefits while gaining the versatility to handle various 5G bandwidth requirements through dynamic parameter adjustment and network environment awareness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the efficiency and stability of wireless communication systems by dynamically adjusting power amplifier biases according to network conditions, reducing power consumption and improving signal processing in high-bandwidth 5G environments.
Implementation Method 1
a power amplifier for receiving the RF transmission signal from the transceiver and amplifying the RF transmission signal
Implementation Method 2
an 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
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.