Intermediate-Frequency Stage Tuning for RF Interference Reduction
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Solution Overview
Problem
Intermediate frequency stage circuitries in wireless communication devices generate noise that interferes with receivers, leading to impaired functionality, and existing hardware solutions to mitigate this interference increase costs and complexity.
Innovation Solution
Adjust operating characteristics such as gain value and linearity of intermediate frequency stage circuitries to reduce interference, without adding hardware, by storing settings to modify these characteristics based on receiver operational modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If intermediate frequency stage circuitries are used to up-convert baseband signals to radio frequency, then transmission capability is improved, but noise interference is generated that degrades receiver performance
Solution Approach 1:
The patent dynamically adjusts the gain values of intermediate frequency stage circuitries based on real-time detection of receiver operational states. When a receiver is detected to be operating on a frequency that would be interfered with by an intermediate frequency stage, the system dynamically modifies the gain characteristics of that stage to reduce noise output, thereby maintaining transmission capability while protecting receiver performance.
Solution Approach 2:
The system changes operational parameters (gain values) of the intermediate frequency stage circuitries to reduce noise interference. By adjusting the gain parameter dynamically based on receiver frequency usage, the system reduces the noise output from intermediate stages without requiring additional hardware components, thus resolving the contradiction between transmission power and noise interference.
2Reliability
If hardware solutions are added to mitigate interference between transmitter and receiver, then receiver performance is improved, but device complexity and cost increase
Solution Approach 1:
The system uses the existing receiver's operational information to automatically adjust transmitter intermediate frequency stage characteristics. The receiver effectively serves its dual purpose: receiving signals and providing feedback about its operational state, which the baseband processor uses to self-regulate the transmitter's noise output, eliminating the need for additional interference mitigation hardware.
Solution Approach 2:
The patent implements a feedback mechanism where the baseband processor continuously monitors receiver operational states and uses this information to adjust the gain values of intermediate frequency stage circuitries. This closed-loop feedback system enables the transmitter to adapt its noise characteristics in real-time based on receiver needs, improving receiver performance without adding complex hardware.
3Power
If gain values of intermediate frequency stage circuitries are increased to improve transmission power, then transmission capability is improved, but noise interference with receiver increases
Solution Approach 1:
The system dynamically adjusts gain values of intermediate frequency stage circuitries based on real-time receiver operational status. When a receiver is detected to be operating on a frequency that would be interfered with by an intermediate frequency stage, the system dynamically modifies the gain characteristics of that stage to reduce noise output, thereby maintaining transmission capability while protecting receiver performance.
Solution Approach 2:
The system changes operational parameters (gain values) of the intermediate frequency stage circuitries to reduce noise interference. By adjusting the gain parameter dynamically based on receiver frequency usage, the system reduces the noise output from intermediate stages without requiring additional hardware components, thus resolving the contradiction between transmission power and noise interference.
Data Source
AI summary
A transmitter of an electronic device may include one or more intermediate frequency stage circuitries. Processing circuitry may select one or more intermediate frequency stage circuitries of the transmitter that output one or more intermediate frequency signals that cause interference with a signal received by a receiver of the electronic device. The processing circuitry may adjust settings of the one or more intermediate frequency stage circuitries to reduce interference with the signal received by the receiver and store the settings. Subsequently, the processing circuitry may receive an indication of an operational mode of the receiver and apply the settings to the one or more intermediate frequency stage circuitries based on the indication.