Power Amplifier Feedback Control for Receiving-Band Noise
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Solution Overview
Problem
Electronic devices face signal quality deterioration due to noise interference from the transmitted signal path into the received signal path, leading to desense issues, which existing technologies fail to effectively address.
Innovation Solution
An electronic device equipped with a noise detector to detect noise in the receiving band and a processor that adjusts the power amplifier's output based on the detected noise level, using control information to eliminate noise and improve signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power amplifier operates at maximum output power, then transmission efficiency is improved, but noise is generated in the receiving band causing signal quality deterioration
Solution Approach 1:
The patent implements a feedback mechanism where a noise detector continuously monitors the receiving band for noise generated by the power amplifier. The processor receives the detected noise level and adjusts the power amplifier's output power accordingly, creating a closed-loop control system that dynamically balances transmission efficiency with noise suppression
Solution Approach 2:
The system dynamically adjusts the power amplifier's output power based on real-time noise detection results. Rather than operating at fixed maximum power, the power amplifier's output is modulated according to the detected noise level, allowing the system to adapt between maximum efficiency operation and noise suppression based on current conditions
2Object-affected harmful factors
If noise detection and control mechanisms are added, then signal quality is improved, but device complexity increases
Solution Approach 1:
The processor in the electronic device performs multiple functions: it controls the power amplifier's output power, processes noise detection results, and manages the overall transmission/reception operations. By making the processor multi-functional, the patent avoids adding a dedicated control unit, thereby limiting the increase in device complexity while still achieving noise detection and control
Data Source
AI summary
A method and an apparatus for improving signal quality through noise detection in an electronic device are provided. The electronic device may include a power amplifier configured to amplify and output a transmitted signal, a noise detector configured to detect noise in a receiving band by the power amplifier and to output a power level of the detected noise, and a processor configured to acquire the power level of the noise through the noise detector, acquire control information to change the output power of the power amplifier based on the power level of the noise, and control the output power of the power amplifier based on the control information.