Microlocation Zones Using Spatially-Correlated Antennas
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Solution Overview
Problem
Conventional systems for determining the location of a portable device relative to an object suffer from inaccuracies due to physical boundaries, external objects, and moving equipment, which affect signal strength and position measurement reliability.
Innovation Solution
A system using spatially-correlated antennas to create microlocation zones by measuring signal characteristics such as time of flight and signal strength across multiple frequencies, applying smoothing functions and differential techniques to mitigate environmental effects and determine precise location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional systems use signal strength measurement with directional antenna to determine relative distance and position, then the system can establish location information, but location accuracy deteriorates due to physical boundaries, external objects, and moving objects
Solution Approach 1:
The patent combines multiple antenna signal outputs (first antenna and second antenna) to form a composite location determination. By merging the measurements from multiple spatially-correlated antennas, the system achieves more accurate and reliable location information that overcomes the limitations of single-antenna conventional systems affected by physical boundaries and external objects.
Solution Approach 2:
The patent introduces spatially-correlated antennas as intermediary elements between the transmitter and receiver. These antennas serve as mediators that capture signal characteristics from multiple angles and positions, allowing the system to determine location more accurately by analyzing the combined signal patterns rather than relying on direct single-point measurements that are susceptible to environmental interference.
2Measurement precision
If the system uses multiple antennas with spatial correlation to measure signal characteristics, then location accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the location determination function across multiple spatially-correlated antennas, where each antenna contributes specific signal characteristic measurements. This segmentation allows the system to achieve higher accuracy by distributing the measurement function across multiple simpler antenna elements rather than using a single complex antenna system.
Solution Approach 2:
The spatially-correlated antenna system performs multiple functions simultaneously: it measures signal strength, determines angle of arrival, and establishes virtual boundaries. By making the antenna system multi-functional, the patent achieves high location accuracy without proportionally increasing complexity, as the same antenna infrastructure supports multiple location determination capabilities.
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
The system achieves enhanced location accuracy by defining virtual boundaries and mitigating environmental factors, allowing for precise determination of a device's position relative to an object, even in complex environments.
Implementation Method 1
Each of the plurality of antennas may be configured to receive wireless communications, where a signal characteristic of the wireless communications is detected via an antenna signal output from each of said plurality of antennas
Implementation Method 2
measuring signal characteristics such as time of flight and signal strength
Data Source
AI summary
A method and system of creating microlocation zones by defining virtual boundaries using a system of one or more transmitters and receivers with one or more spatially-correlated antennas.