A multi-scenario robust bluetooth AOA indoor positioning method
CN116233737BActive Publication Date: 2026-05-29NANJING WOXU COMM TECH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANJING WOXU COMM TECH
- Filing Date
- 2023-03-07
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Existing Bluetooth indoor positioning methods suffer from angular signal glitches in complex indoor environments, affecting positioning accuracy.
Method used
Signal sampling is performed using a Bluetooth base station antenna array. An improved MUSIC algorithm is then used for eigenvalue decomposition and covariance analysis to construct a residual chi-square Kalman filter. An outlier is filtered by setting a chi-square threshold based on scene characteristics, and the angle calculation is optimized.
Benefits of technology
It improves the accuracy and robustness of indoor positioning, effectively removes outliers, and enhances positioning accuracy.
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Smart Images
Figure CN116233737B_ABST
Abstract
The application discloses a multi-scene robust Bluetooth AOA indoor positioning method, which comprises the following steps: obtaining the IQ value of each antenna array element; solving the phase of each antenna array element; performing eigenvalue decomposition on the covariance of the antenna array phase to obtain a signal space and a noise space; calculating the horizontal angle and the pitch angle that make the spatial spectrum P MUsIC The horizontal angle and the pitch angle that make the spatial spectrum P The application can improve the robustness of the angle, thereby improving the positioning precision.
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