Coexistence Module for Simultaneous Modem Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Converged portable communication devices face complex self-interference scenarios due to simultaneous operation of multiple modems, leading to performance degradation and non-compliance with regulatory emission limits, as existing interference mitigation strategies are inadequate.
Innovation Solution
A programmable logic array operates as a coexistence module (CEM) to detect, analyze, and apply hardware and software mitigation to interference, using attenuation switches and processors to manage simultaneous modem operations, ensuring mission-critical communications without infrastructure collaboration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two modems operate simultaneously in a converged device, then functionality and versatility are improved, but self-interference and performance degradation occur
Solution Approach 1:
The patent introduces a coexistence manager as an intermediary component that mediates between multiple modems and the RF front end. This manager detects interference conditions and dynamically controls RF switches to isolate interfering modems, allowing simultaneous operation of multiple modems while preventing performance degradation through active interference management.
Solution Approach 2:
The system dynamically adjusts the operational state of different modems based on real-time interference detection. The coexistence manager continuously monitors RF conditions and dynamically enables or disables specific modems or RF paths using programmable logic arrays and RF switches, transforming the static modem operation into a dynamic, adaptive system that responds to changing interference conditions.
2Object-affected harmful factors
If existing interference mitigation strategies are applied to converged devices, then some interference is reduced, but performance and timing of sub-systems are negatively impacted
Solution Approach 1:
The coexistence manager performs preliminary detection of interference conditions before they severely impact modem performance. By proactively identifying potential interference scenarios and pre-configuring RF switch states or modem operational modes, the system prevents performance degradation without requiring reactive interruptions or time-consuming mitigation actions.
Solution Approach 2:
The system implements a feedback mechanism where the coexistence manager continuously monitors RF interference levels and performance metrics from multiple modems. Based on this real-time feedback, the manager dynamically adjusts RF switch configurations and modem operational parameters, creating a closed-loop control system that maintains optimal performance while minimizing interference impact.
Data Source
Figure 1
Figure 2
AI summary
A portable communication device provides improved converged operations through the use of a programmable logic array operating as a coexistence module (CEM) interoperating with different processors, different modems, and an attenuation switch. Interference during converged operation is detected, analyzed, and applicable mitigation is applied, thereby enabling converged communications to be established in a mitigated mode until the interference has been removed.