Power Amplifier Voltage Control for RF Signal Linearity
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Solution Overview
Problem
The signal quality of RF signals is degraded due to reflected waves from nearby objects, leading to linearity issues and reduced signal quality in wireless communication systems.
Innovation Solution
An electronic device equipped with a processor that determines the signal quality of both uplink and downlink signals and adjusts the voltage supplied to the power amplifier using a power supply modulator, thereby maintaining signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If RF signal is transmitted through the antenna, then wireless communication function is achieved, but the linearity of the RF signal is deteriorated due to reflected waves
Solution Approach 1:
The patent implements a feedback mechanism where the processor monitors signal quality indicators (such as ACLR or BLER) of the transmitted RF signal and adjusts the power amplifier's operating conditions accordingly. When signal quality degradation is detected due to reflected waves, the system adjusts the voltage supplied to the power amplifier to maintain optimal performance, thereby resolving the contradiction between maintaining wireless communication function and preserving signal quality.
Solution Approach 2:
The patent changes the operating parameters of the power amplifier by adjusting the voltage supplied to it based on detected signal quality conditions. When reflected waves cause linearity deterioration, the system modifies the voltage parameter to optimize the power amplifier's performance, thus maintaining signal quality while continuing to perform wireless communication functions.
2Reliability
If voltage to power amplifier is adjusted to maintain signal quality, then linearity is improved, but device complexity increases
Solution Approach 1:
The patent implements a self-service mechanism where the system automatically monitors its own signal quality and adjusts its operating parameters without external intervention. The processor detects signal quality degradation and autonomously adjusts the power amplifier voltage, eliminating the need for complex external control systems while maintaining signal quality.
Solution Approach 2:
The patent makes the existing processor perform multiple functions: it not only manages general device operations but also monitors signal quality indicators and controls power amplifier voltage adjustment. This multi-functionality approach avoids adding separate dedicated control circuits, thereby maintaining signal quality while minimizing increases in device complexity.
Data Source
AI summary
According to various embodiments of the present disclosure, an electronic device may comprise: a transceiver; a power amplifier connected to the transceiver; a power source modulator configured to supply power to the power amplifier; at least one antenna connected to the power amplifier; and at least one processor operably connected to the transceiver, the power amplifier; and the power source modulator. The at least one processor may confirm whether the state of an uplink signal transmitted through the at least one antenna is a first state, and may control the power source modulator to add a first offset value to a voltage value of power supplied to the power amplifier from the power source modulator, based on the state of a downlink signal received to the transceiver being the first state.