RF Amplifier Gain Compensation for Wireless Signal Distortion
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Solution Overview
Problem
Radio frequency systems experience unwanted distortion of wireless signals due to variations in operation parameters such as power amplifier gains, which can lead to loss of information and interference with other radio channels, especially in millimeter-wave communication technologies like 5G.
Innovation Solution
A peak-to-average power ratio (PAPR) detection circuit dynamically adjusts the amplification gain of power amplifiers based on distortion information extracted from transmitted signals, comparing reference and output signals to correct for gain compression and expansion, thereby mitigating signal distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power amplifiers amplify wireless signals to ensure reception, then signal strength is improved, but gain variation causes signal distortion
Solution Approach 1:
The patent implements a feedback mechanism where the system measures the actual gain of power amplifiers and uses this information to adjust operating parameters. The processor monitors signal characteristics and dynamically adjusts power amplifier gain to compensate for variations, thereby maintaining both signal strength and fidelity despite environmental changes.
Solution Approach 2:
The system dynamically changes operating parameters of power amplifiers based on measured conditions. By adjusting gain parameters in real-time according to environmental factors and system state, the patent maintains optimal signal amplification while preventing distortion caused by parameter drift.
2Power
If power amplifier gain is increased to improve signal reception, then signal strength is improved, but gain compression and expansion distort the signals
Solution Approach 1:
The patent employs feedback control where the system continuously monitors output signal characteristics and adjusts power amplifier gain accordingly. This closed-loop approach ensures that signal strength is maintained while preventing gain compression and expansion that would compromise signal accuracy.
Solution Approach 2:
The system transitions from static power amplifier operation to dynamic operation where gain parameters are continuously adjusted based on real-time measurements. This dynamic adaptation allows the system to maintain optimal performance across varying conditions without introducing distortion.
3Manufacturing precision
If the radio frequency system processes signals to correct distortion, then signal fidelity is improved, but system complexity increases
Solution Approach 1:
The patent implements a self-service approach where the radio frequency system automatically measures its own gain variations and adjusts its operating parameters without external intervention. This self-calibration mechanism improves signal fidelity while minimizing the need for complex external processing equipment.
Solution Approach 2:
The system integrates multiple functions into existing components, allowing the same hardware to perform both signal amplification and self-diagnosis. By making existing components multi-functional, the patent achieves distortion correction without proportionally increasing system complexity.
Data Source
AI summary
Systems, methods, and devices are provided for correcting compression distortion of wireless signals due to variations in operation parameters of the radio frequency system. The method may include using circuitry to generate a reference signal that is not pre-distorted by a processing block. The method may involve receiving an envelope signal representative of a signal being transmitted by a transceiver. The method may also involve determining a first peak-to-average ratio of the envelope signal and receiving a second peak-to-average ratio of the reference signal. The method may additionally involve determining a difference between the first peak-to-average ratio and the second peak-to-average ratio. The method may also include adjusting a gain of an amplifier of the transceiver based on the difference.