AoA Distance Calculation Using Multi-Angle Detection
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Solution Overview
Problem
Existing location estimation methods using RSSI are unable to accurately obtain distance due to noise in the radio wave environment, resulting in a distance resolution of only meters.
Innovation Solution
An information processing system that includes first and second angle detection sections to detect reception angles of a signal in multiple apparatuses, and a distance calculation section to calculate the distance to a transmitter based on these angles and the inter-apparatus distance, allowing for accurate distance determination using AoA technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RSSI-based positioning method is used, then location estimation can be performed, but distance measurement precision deteriorates to meter-level resolution due to radio wave noise
Solution Approach 1:
The patent transitions from one-dimensional RSSI signal strength measurement to two-dimensional angle-based positioning by incorporating reception angle detection in multiple apparatuses. This dimensional change enables precise distance calculation through geometric relationships, achieving centimeter-level accuracy without being constrained by radio wave noise limitations.
2Measurement precision
If multiple apparatuses with angle detection sections are deployed, then distance measurement precision improves to centimeter-level, but device complexity increases
Solution Approach 1:
The patent divides the positioning function into separate angle detection sections in multiple apparatuses, with each apparatus independently measuring reception angles. This segmentation allows the system to collect multiple angle measurements from different positions, enabling precise triangulation-based distance calculation while distributing the measurement functionality across several devices.
3Measurement precision
If angle-based distance calculation is performed using multiple apparatuses, then distance accuracy improves, but calculation complexity increases
Solution Approach 1:
The patent replaces complex iterative optimization algorithms with a direct geometric calculation approach. By using the relationship between reception angles measured in multiple apparatuses and the known inter-apparatus distances, the system calculates transmitter distance through straightforward trigonometric relationships, reducing computational complexity while maintaining high precision.
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 approach enables the calculation of an absolute distance with an error of centimeters, unaffected by noise, providing a more accurate distance measurement compared to RSSI-based methods.
Implementation Method 1
detecting a first reception angle of a signal in a first apparatus that is received from a transmitter, detecting a second reception angle of the signal in a second apparatus
Data Source
AI summary
The present disclosure relates to an information processing system, an information processing method, and an information processing apparatus that obtain a more accurate distance. A first angle detection section detects a first reception angle of a signal in a first apparatus that is received from a transmitter. A second angle detection section detects a second reception angle of the signal in a second apparatus. A distance calculation section calculates distance information regarding a distance to the transmitter according to the first reception angle, the second reception angle, and the inter-apparatus distance between the first apparatus and the second apparatus. The technology according to the present disclosure is applicable, for example, to TWS based on the use of BLE.