UWB Interference Mitigation via IF Signal Adjustment
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Solution Overview
Problem
Wireless communication devices face interference issues due to internal radio frequency (RF) coexistence problems, where intermediate frequency (IF) signals from one transceiver can interfere with other transceivers operating in overlapping frequency bands, leading to signal de-sense and reduced performance.
Innovation Solution
A user equipment (UE) is designed with a processor that detects interference between IF band signals and first frequency band signals, and adjusts the IF band signal characteristics to mitigate interference, such as reducing signal strength or changing frequency, to prevent de-sense, using mechanisms like reducing amplifier gain or shifting frequencies to avoid overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the second communication component uses an intermediate frequency band to conduct signals, then signal transmission capability is improved, but interference to the first communication component increases due to overlapping frequency bands
Solution Approach 1:
The patent adjusts signal characteristics (parameters) such as amplitude, frequency, or phase of the intermediate frequency band signal to reduce interference while maintaining transmission capability. The processor dynamically modifies these parameters based on detected interference levels to resolve the contradiction between transmission performance and interference generation.
Solution Approach 2:
The system implements dynamic interference mitigation where the processor continuously monitors for interference indications and adjusts the intermediate frequency band signal characteristics in real-time. This dynamic adaptation allows the system to maintain optimal signal transmission while actively managing interference to the first communication component.
2Object-affected harmful factors
If the processor adjusts the intermediate frequency band signal to mitigate interference, then interference reduction is achieved, but signal quality or transmission performance may deteriorate
Solution Approach 1:
The patent employs feedback mechanisms where the processor detects interference indications from the first communication component and uses this feedback to adjust the intermediate frequency band signal. This closed-loop control allows the system to reduce interference while monitoring and maintaining acceptable signal quality levels, preventing excessive degradation of transmission performance.
Solution Approach 2:
The processor dynamically modifies signal parameters of the intermediate frequency band to achieve interference mitigation while preserving signal quality. By carefully selecting and adjusting parameters such as amplitude reduction or frequency shifting, the system reduces harmful interference without causing excessive signal degradation.
3Adaptability or versatility
If multiple communication components operate simultaneously in overlapping frequency bands, then device functionality and versatility are improved, but RF coexistence problems increase
Solution Approach 1:
The patent implements self-service interference mitigation where the second communication component autonomously detects and adjusts its own signal characteristics to reduce interference to the first communication component. This self-regulating mechanism enables multiple communication components to coexist by allowing each component to independently manage its own interference contribution.
Solution Approach 2:
The system enables dynamic coexistence of multiple communication components through real-time monitoring and adjustment. The processor dynamically controls the intermediate frequency band signal characteristics based on detected interference conditions, allowing versatile device functionality while actively managing RF coexistence problems between simultaneous operations.
Data Source
AI summary
A user equipment (UE) includes a first communication component configured to use a first frequency band, such as ultra-wide band (UWB), and a second communication component configured to use an intermediate frequency (IF) band that overlaps with the UWB band, such as an IF millimeter wave (mmWave) band. The second communication component conducts an IF signal along an internal signal conduction line that may interfere with UWB processing. A processor of the UE is configured to detect an indication of such interference, and, in response to the indication of interference, control the second communication component to adjust a characteristic of the IF band signal to mitigate the interference, such as by reducing its signal strength. The amount by which the IF band signal strength is reduced may be controlled to achieve a desired tradeoff between various performance metrics, such as power consumption and quality of service.