RF Front-End Gain Control for BLE-LTE Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication devices operating on different communication channels, such as Bluetooth Low Energy (BLE) and Long-Term Evolution (LTE), experience interference due to overlapping frequency spectra, leading to degradation in receiver performance and potential damage from high-power LTE signals.
Innovation Solution
Implementing dynamic attenuation/gain control and bandwidth control components, along with an on-board band pass filter and Inductor/Capacitor Trap circuit, to adjust RF front-end gain settings and filter out unwanted frequencies, thereby mitigating interference and protecting the low-noise amplifier from saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dynamic attenuation/gain control and bandwidth control components are implemented, then receiver performance is improved and interference is reduced, but device complexity increases
Solution Approach 1:
The patent implements dynamic attenuation/gain control components that automatically adjust RF front-end gain settings based on detected signal conditions. The system dynamically switches between different gain stages and filter bandwidths to optimize receiver performance under varying interference conditions, resolving the contradiction by making the system adaptive rather than static.
Solution Approach 2:
The patent divides the receiver into multiple functional stages with separate attenuation/gain control components and bandwidth control components. Each stage can be independently optimized and controlled, allowing granular management of interference mitigation while maintaining overall system performance.
2Object-affected harmful factors
If band pass filter and LC Trap circuit are added to filter out unwanted frequencies, then interference mitigation is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent introduces an on-board band pass filter and Inductor/Capacitor Trap circuit as intermediary components between the antenna and the receiver front-end. These filters act as mediators that selectively pass desired frequencies while blocking interfering frequencies, particularly LTE signals, before they can saturate the LNA.
Solution Approach 2:
The patent applies filtering actions before the interference can affect the receiver. The band pass filter and LC Trap circuit are positioned to preemptively remove unwanted frequencies and attenuate LTE signals before they reach the low-noise amplifier, preventing LNA saturation before it occurs.
3Reliability
If RF front-end gain settings are adjusted to prevent LNA saturation, then reliability is improved, but signal-to-noise ratio may deteriorate
Solution Approach 1:
The patent employs dynamic gain control that adjusts RF front-end settings in real-time based on detected signal conditions. When LTE interference is detected, the system adjusts gain stages to prevent LNA saturation while maintaining optimal signal-to-noise ratio for legitimate signals through adaptive control.
Solution Approach 2:
The patent applies different gain settings and filtering characteristics to different frequency ranges and signal conditions. The attenuation/gain control components provide localized optimization for specific interference scenarios rather than uniform adjustment across all signals, preserving signal-to-noise ratio for desired frequencies while blocking interference.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces interference, improves signal-to-noise ratio, and prevents LNA saturation, ensuring reliable communication by attenuating or filtering out interfering LTE signals and maintaining the integrity of BLE signals.
Implementation Method 1
on-board band pass filter and Inductor/Capacitor Trap circuit, to adjust RF front-end gain settings and filter out unwanted frequencies
Implementation Method 2
Inductor/Capacitor Trap circuit
Implementation Method 3
dynamic attenuation/gain control and bandwidth control components, along with an on-board band pass filter
Data Source
AI summary
Systems and techniques are described for mitigating interference in wireless communication devices. In various examples, a device may determine a first energy level of a first received wireless signal and may determine that the first energy level is above a first threshold. The device may attenuate the first received wireless signal by a first amount. The device may filter the first received wireless signal with a band pass filter with a first passband frequency range. The device may be effective to program the band pass filter with the first passband frequency range based on the detected first energy level exceeding the first threshold.