Wearable RF Coexistence Control via Dynamic Circuit Reconfiguration
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Solution Overview
Problem
Wearable devices experience challenges in maintaining radio coexistence between different wireless communication systems, leading to RF interference and reduced energy efficiency due to power amplifier operation at higher linearity, which increases power consumption.
Innovation Solution
A system adjusts configuration settings of RF circuits using a lookup table to minimize coexistence loss and improve energy efficiency by categorizing conditions as entries and applying mitigation adjustments with the highest available scores.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power amplifier operates at higher linearity to reduce RF interference, then radio coexistence quality is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the operation mode of the power amplifier based on real-time detection of RF interference levels. When interference exceeds a threshold, the system transitions to high linearity mode; otherwise, it operates in normal mode. This dynamic adaptation resolves the contradiction by only consuming extra power when necessary for maintaining radio coexistence quality.
Solution Approach 2:
The invention changes the operating parameters of the power amplifier (specifically the linearity level) based on detected interference conditions. By adjusting the linearity parameter dynamically rather than maintaining it at a fixed high level, the system achieves good radio coexistence when needed while minimizing power consumption during normal operation.
2Reliability
If power amplifier operates at higher linearity to reduce RF interference, then coexistence loss is reduced, but energy efficiency deteriorates
Solution Approach 1:
The system employs dynamic mode switching between normal and high linearity operation based on real-time interference detection. This dynamic approach ensures that energy-efficient normal operation is maintained when coexistence loss is acceptable, while transitioning to higher energy consumption only when necessary to reduce coexistence loss below the threshold.
Solution Approach 2:
The operating linearity parameter of the power amplifier is changed dynamically based on detected RF interference levels. The system monitors coexistence loss and adjusts the linearity parameter accordingly, achieving optimal energy efficiency while maintaining acceptable coexistence performance.
3Reliability
If impedance of circuit antennas is adjusted to reduce RF interference, then radio coexistence quality is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts antenna impedance only when RF interference exceeds the defined threshold. The controller monitors interference levels and selectively modifies impedance parameters, maintaining energy-efficient operation during normal conditions while improving radio coexistence quality when interference occurs.
Solution Approach 2:
The impedance parameters of the circuit antennas are changed dynamically based on detected interference conditions. By adjusting impedance only when necessary rather than maintaining optimized impedance continuously, the system improves radio coexistence quality while minimizing the impact on power consumption.
Data Source
AI summary
Disclosed herein are related to a device that can include a first circuit and second circuit each configured for a communications protocol, the second circuit configured to determine a loss caused by an interference from the first wireless communications protocol. The device includes a controller circuit configured to: determine, in response to the loss and according to a state of the circuits, a configuration for operating at least one of the first circuit or the second circuit. The state includes a power of a signal of the second wireless communication protocol, and at least one of: a frequency of the first circuit, a modulation of the first circuit, a power of a signal of the first wireless communications protocol or a frequency of the second circuit. The device can apply the configuration to at least one of the first circuit or the second circuit to adjust the loss.