Dynamic Spectrum Utilization for RF Interference Mitigation
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Solution Overview
Problem
Communication systems face challenges with limited radio frequency spectrum due to interference from various sources, including internal and external transmissions, which degrade communication links and reduce available spectrum, and existing solutions are inadequate in managing and reusing spectrum effectively.
Innovation Solution
A remote communications node unit employs a dynamic spectrum utilization system that measures RF interference using a measuring module and processing module to determine optimal frequency allocations based on mission priority, channel availability, and susceptibility data, distinguishing between different types of interference and adjusting thresholds dynamically to improve spectrum management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional hardware implementations of antenna directivity and agile RF filtering are used, then interference mitigation is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex hardware implementations (antenna directivity systems, agile RF filtering, interference cancellation phase inversion systems) with a software-based dynamic spectrum utilization approach. The system uses measuring modules to detect interference, processing modules to analyze and classify interference sources, and control modules to dynamically adjust frequency allocations and transmission parameters through software algorithms rather than hardware modifications.
Solution Approach 2:
The system dynamically changes operational parameters (frequency selection, power levels, modulation schemes) based on real-time interference measurements and environmental conditions. The processing module continuously monitors spectrum usage and adjusts transmission parameters to optimize performance while avoiding interference, replacing static hardware configurations with adaptive parameter control.
2Productivity
If frequency spread bandwidth allocation is implemented, then spectrum utilization is improved, but measurement precision requirements increase
Solution Approach 1:
The patent introduces a processing module as an intermediary between the measuring module and the frequency allocation system. This processing module classifies interference sources (distinguishing between co-site interference, external innocent transmissions, and hostile jamming), aggregates interference data from multiple measurements, and makes intelligent decisions about frequency allocation. This intermediary layer enables effective spectrum utilization even with imperfect individual measurements by using statistical analysis and pattern recognition.
3Adaptability or versatility
If dynamic threshold adjustment is used, then adaptability is improved, but difficulty of detecting and measuring interference increases
Solution Approach 1:
The system implements dynamic threshold adjustment where detection thresholds are continuously adapted based on measured interference levels, historical data, and environmental conditions. The processing module learns from patterns in interference measurements and automatically adjusts sensitivity thresholds to maintain optimal detection performance across varying operational conditions, enabling the system to adapt to different spectrum environments without manual reconfiguration.
Data Source
AI summary
A remote communications node unit (86) determines radio frequency (RF) dynamic spectrum utilization for use in a RF communications network (154) and includes a measuring module (46) for measuring radio frequency (RF) interference at a location of the communications node unit (86). A processing module (62) receives RF measurement data from the measuring module (46) for determining RF interference in a local environment of the remote communications node (86) based upon selected factors of the type including mission priority parameters, channel availability statistics, link dynamic information, and the waveform dependent susceptibility data. The processing module (62) controls communications frequency and characteristics used by the remote communications module (86) for exchange of information with other remote communications nodes (86).