Wireless Device Position Estimation Using Multi-Path Propagation Data
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Solution Overview
Problem
Existing methods for estimating the location of wireless devices based on propagation characteristics are prone to inaccuracies due to fluctuations in measured data, especially when multiple devices are involved, as these methods do not effectively account for variations in propagation paths and environmental factors.
Innovation Solution
An electronic apparatus that estimates the positions of wireless devices by acquiring and processing communication information across multiple propagation paths, using a processor to generate and compare distributions of propagation data, thereby reducing the influence of outliers and improving estimation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If propagation characteristics are measured between wireless devices to estimate positions, then position estimation can be performed, but measurement fluctuations cause estimation inaccuracy
Solution Approach 1:
The patent combines propagation characteristic measurements from multiple propagation paths between wireless devices to perform position estimation. By merging data from multiple paths rather than relying on a single path, the system reduces the impact of fluctuations in any individual measurement, thereby improving both measurement stability and position estimation accuracy
Solution Approach 2:
The patent introduces the dimension of multiple propagation paths to the position estimation process. Instead of using a single measurement dimension, the system utilizes measurements across multiple independent propagation paths, adding redundancy and diversity to the data set, which reduces the influence of outliers and improves estimation reliability
2Measurement precision
If multiple propagation paths are used for position estimation, then estimation accuracy improves, but system complexity increases
Solution Approach 1:
The patent makes wireless devices perform multiple functions: they not only communicate with each other but also measure propagation characteristics and participate in position estimation. This multi-functionality allows the system to use existing device capabilities for multiple purposes, improving estimation accuracy without proportionally increasing system complexity
Solution Approach 2:
Wireless devices perform self-measurement of propagation characteristics along multiple paths. Each device utilizes its own transmission and reception capabilities to measure propagation data, eliminating the need for separate measurement equipment and reducing overall system complexity while still achieving improved estimation accuracy
Data Source
AI summary
According to one embodiment, an electronic apparatus includes a processor configured to estimate positions where wireless devices communicating each other are located from position candidates based on position candidate information indicating the position candidates of the wireless devices and from first communication information in communication using a first propagation path between the wireless devices to N-th communication information in communication using a N-th propagation path (N: an integer of 2 or more) between the wireless devices.