Indoor Positioning Using Multi-Antenna Angle Estimation
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Solution Overview
Problem
Existing positioning methods struggle to balance complexity and accuracy in indoor scenarios with limited routers, particularly due to high complexity in distance calculations using Received Signal Strength Indication (RSSI).
Innovation Solution
A method that determines horizontal azimuth and vertical pitch angles using communication performance indicators from multiple antennas on a single site, estimating angles through ratios rather than direct distance estimation, allowing for accurate positioning without data synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple testing sites that are not co-linear or coplanar are used for positioning, then positioning accuracy is improved, but device complexity and layout complexity increase
Solution Approach 1:
The patent segments the positioning function into two parts: angle estimation using multiple antennas at a single site, and position calculation using the estimated angles. This segmentation allows achieving positioning accuracy without requiring multiple complex testing sites, thereby reducing layout complexity while maintaining measurement precision.
Solution Approach 2:
The patent transitions from using spatial distribution of multiple testing sites (horizontal dimension) to using angular information from multiple antennas (angular dimensions). By estimating horizontal azimuth angles and vertical pitch angles from signal strength ratios, the system achieves positioning accuracy through angular measurement rather than through spatial configuration of multiple sites.
2Measurement precision
If distance is calculated using RSSI in complex indoor scenarios, then positioning function is achieved, but calculation complexity increases
Solution Approach 1:
The patent replaces the traditional RSSI-based distance calculation mechanism with an angle estimation mechanism. Instead of calculating distance directly from signal strength (which requires complex path loss modeling in indoor scenarios), the system estimates horizontal and vertical angles from RSSI ratios, then derives position from these angles, significantly simplifying the calculation process.
Solution Approach 2:
The patent changes the parameter used for positioning from direct distance measurement to angular measurement. By using ratios of RSSI values from different antennas to estimate angles rather than calculating absolute distances, the system avoids complex indoor propagation modeling and reduces calculation complexity while maintaining positioning functionality.
3Measurement precision
If multiple testing sites are used for positioning, then positioning accuracy is improved, but loss of time for data synchronization increases
Solution Approach 1:
The patent merges the positioning function into a single testing site by equipping it with multiple antennas. This consolidation eliminates the need for data synchronization between multiple sites, reducing time loss, while the multiple antennas provide sufficient information for accurate angle estimation and positioning.
Data Source
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AI summary
The present disclosure provides a positioning method, a positioning apparatus, and an electronic apparatus. The method includes: acquiring receiving signal values respectively corresponding to a plurality of antennas on a same testing site, wherein the receiving signal values are values of signals respectively received from a tested target; according to the receiving signal values respectively corresponding to the plurality of antennas, determining a horizontal azimuth angle between the tested target and the testing site and a vertical pitch angle between the tested target and the testing site; determining a space distance between the tested target and the testing site; and determining a spatial position of the tested target according to the horizontal azimuth angle, the vertical pitch angle, and the space distance. Therefore, the problem that a positioning method in the related art known to the inventor cannot take both complexity and high accuracy into consideration at the same time is solved.