Repeater Power Amplifier Backoff Control for Lower PAPR
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G NR, face challenges in managing power amplifier backoff to optimize signal transmission efficiency and reduce peak-to-average power ratio (PAPR), which affects repeater performance and coverage.
Innovation Solution
A method and apparatus are employed to model a channel signal, perform PAPR reduction, and input the signal through an inverse channel model to generate an output with reduced PAPR, while also enabling dynamic power amplifier backoff control through capability signaling between network entities and repeaters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dynamic power amplifier backoff control is implemented, then power amplifier efficiency and signal transmission quality are improved, but system complexity increases due to additional signaling and processing requirements
Solution Approach 1:
The patent implements dynamic power amplifier backoff control by adjusting the backoff value in real-time based on channel conditions and signal characteristics. The system transitions from static to dynamic operation, allowing the backoff parameter to change adaptively to optimize performance while managing complexity through controlled flexibility
Solution Approach 2:
The system incorporates feedback mechanisms where the repeater reports capability information and operational status to the network entity, which then adjusts backoff parameters accordingly. This closed-loop control enables automatic optimization of signal transmission quality while containing complexity through automated decision-making
2Use of energy by moving object
If PAPR reduction techniques are applied, then power amplifier efficiency is improved, but signal processing complexity increases
Solution Approach 1:
The patent applies PAPR reduction by modifying signal parameters such as power backoff values and transmission characteristics. The system changes operational parameters to achieve lower peak-to-average power ratio, improving power amplifier efficiency while containing processing complexity through parameter-based solutions rather than fundamentally new processing techniques
3Productivity
If dynamic backoff signaling is enabled, then repeater performance is optimized, but capability negotiation and control overhead increase
Solution Approach 1:
The system performs capability negotiation and backoff configuration in advance before actual signal transmission begins. By preparing and establishing optimal parameters beforehand, the system reduces real-time processing time and overhead during operation, thereby optimizing repeater performance without significant time loss during data transmission
Data Source
AI summary
Method and apparatus for dynamic control of power amplifier back off for repeaters. The apparatus uses a channel model to model a first signal at a channel output. The channel model models a channel between a receiver and a transmitter. The apparatus performs a PAPR reduction on the first signal at the receiver to generate a second signal having a reduced PAPR. The apparatus inputs the second signal through an inverse channel model to generate an output signal. The apparatus outputs the output signal to the receiver, such that the PAPR of the output signal is reduced at an input of the receiver.