Metadata-Based Radio Emitter Localization
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Solution Overview
Problem
Existing systems for spatial localization of radio emitters face challenges in accurately determining emitter locations due to limited hardware resources such as bandwidth and storage capacity in sensing devices, which restrict the transmission and processing of raw radio signals, leading to reduced accuracy and increased costs.
Innovation Solution
The system processes metadata descriptive of radio signals, such as time-estimates and frequency-estimates, received by multiple sensing devices to determine emitter locations, allowing for spatial localization without relying on extensive communication or processing resources, and uses an information combining node to analyze metadata from these devices to pinpoint emitter locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If raw radio signals are transmitted and processed by sensing devices, then spatial localization accuracy is improved, but communication bandwidth and storage capacity requirements increase significantly
Solution Approach 1:
The patent extracts only the essential features (metadata) from the raw radio signals for transmission and processing. Instead of transmitting complete raw signals, the system extracts time-estimates, frequency-estimates, and other relevant metadata parameters, thereby reducing communication bandwidth and storage requirements while preserving the information needed for accurate spatial localization.
Solution Approach 2:
The patent introduces metadata as an intermediary representation between the raw radio signals and the localization processing. The metadata serves as a compressed intermediary that captures the essential characteristics of the signals without requiring full signal transmission, enabling accurate localization with reduced resource requirements.
2Quantity of substance
If metadata processing is used instead of raw signal processing, then communication and storage costs are reduced, but spatial localization accuracy may deteriorate
Solution Approach 1:
The patent changes the representation parameters from complete raw signals to extracted metadata parameters (time-estimates, frequency-estimates, signal strength, etc.). This parameter transformation reduces data volume while maintaining the critical information needed for localization, achieving cost reduction without significant accuracy loss.
Solution Approach 2:
The patent performs preliminary processing of the radio signals at the sensing devices to extract metadata before transmission. This preliminary action of extracting essential features locally reduces the burden on communication and storage systems while preserving localization accuracy, as the critical information is captured in advance.
3Measurement precision
If multiple sensing devices are deployed for improved localization accuracy, then system complexity and coordination requirements increase
Solution Approach 1:
The patent segments the localization function into independent sensing devices that each extract and transmit their own metadata independently. This segmentation allows multiple devices to operate autonomously without complex coordination, as each device processes signals locally and transmits results to a central node that performs the final localization calculation.
Data Source
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AI summary
A method includes obtaining signal information corresponding to a plurality of radio signals received at two or more sensing devices from a candidate location, determining a plurality of reconstructed signals based on the signal information, determining time-estimates and frequency-estimates based on a correlation between the radio signals and the reconstructed signals, determining metadata corresponding to the radio signals based on the signal information, the time-estimates, or the frequency-estimates, transmitting at least a portion of the metadata to an information combining node, obtaining the portion of the metadata from the information combining node, determining a relationship between the metadata, and determining the candidate location based on the metadata and the relationship between the metadata. Transmission of the radio signals to the information combining node is restricted based on a bandwidth of the two or more sensing devices or the information combining node.