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 optimizing power consumption and system stability due to the higher bandwidth requirements, as they often rely on limited parameters adapted for lower bandwidth scenarios.
Innovation Solution
An electronic device equipped with a network monitor to acquire environment information, an ET modulator that determines the power amplifier's bias based on this information, and a transceiver to generate an envelope signal for optimizing power amplifier performance in varying network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional wireless communication systems use limited parameters adapted for lower bandwidth scenarios, then device complexity is reduced, but power consumption efficiency and system stability deteriorate in 5G high bandwidth environments
Solution Approach 1:
The patent implements dynamic parameter adjustment by continuously monitoring network environment information (bandwidth, signal strength, interference levels) and adapting ET, DPD, and CFR parameters in real-time. This transforms the static parameter configuration into a dynamic system that optimizes power consumption efficiency based on current operating conditions, resolving the contradiction between simplicity and efficiency in 5G environments.
Solution Approach 2:
The system changes operational parameters (ET modulation depth, DPD coefficients, CFR clipping levels) based on network conditions to optimize power consumption. By adjusting these parameters dynamically rather than using fixed conventional settings, the system achieves better power efficiency in high bandwidth 5G scenarios without requiring complete redesign of the communication architecture.
2Device complexity
If conventional wireless communication systems use fixed parameters, then device complexity is reduced, but adaptability to varying network environments deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors network environment information and uses this feedback to adjust ET, DPD, and CFR parameters. This closed-loop control enables the system to adapt to varying network conditions (different bandwidths, signal strengths, interference levels) while maintaining manageable complexity through automated parameter optimization based on real-time feedback.
Solution Approach 2:
The system transitions from static fixed parameters to dynamic adaptive parameters that respond to network conditions. By making parameters dynamic and condition-dependent, the system achieves high adaptability to varying 5G network environments without requiring manual reconfiguration or complex decision-making processes.
3Device complexity
If envelope tracking with limited parameters is used in 5G networks, then device complexity is reduced, but power consumption optimization and system stabilization deteriorate
Solution Approach 1:
The patent optimizes ET system reliability by dynamically adjusting ET-specific parameters (modulation depth, bandwidth allocation, power supply voltage) based on network conditions. This parameter adaptation enables the ET system to maintain stable operation and achieve better power consumption optimization in 5G environments without introducing excessive complexity to the overall system architecture.
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.