Bluetooth Positioning Angle Accuracy via Signal Quality Filtering
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Solution Overview
Problem
The accuracy of Bluetooth positioning angles is compromised by the quality of signals received or transmitted by antennas in a Bluetooth antenna array, with poor signal quality leading to lower accuracy.
Innovation Solution
A method that filters out signals with low signal strength indicators by acquiring sampled IQ data and phase differences, performing phase compensation, and determining position angles based on preset thresholds and standard deviations to improve signal quality and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signals from all antennas are used for positioning calculation, then the quantity of data is sufficient, but the accuracy of positioning angle decreases due to poor signal quality
Solution Approach 1:
The patent introduces a signal strength indicator parameter to evaluate signal quality and uses this parameter to selectively process sampled messages. By changing the parameter (signal strength) as a criterion for message validation, the system filters out low-quality signals while retaining sufficient data for accurate positioning angle calculation.
2Measurement precision
If phase compensation processing is performed, then the accuracy of position angle is improved, but the device complexity increases
Solution Approach 1:
The patent performs phase compensation processing as a preliminary step before positioning angle calculation. By pre-compensating the phase differences between adjacent antennas, the system prepares the data in advance, reducing the complexity of subsequent calculations while improving accuracy.
Solution Approach 2:
The system calculates standard deviation of phase differences and uses this statistical feedback to determine whether to accept or discard sampled messages. This feedback mechanism ensures that only high-quality signals with low noise (standard deviation below threshold) are used for positioning, improving accuracy without excessive complexity.
Data Source
AI summary
Provided are a Bluetooth positioning method, a terminal device, an electronic device and a storage medium The Bluetooth positioning method includes: acquiring a sampled message, wherein the sampled message includes a sampled IQ data and a data signal strength indicator, and the sampled IQ data includes a plurality of sampled IQ values obtained by sequentially sampling signals received or transmitted by a plurality of antennas in a Bluetooth antenna array according to a preset order, wherein the signals received or transmitted by the plurality of antennas are signals transmitted by an identical signal source; and judging whether the data signal strength indicator is greater than a preset threshold, wherein if the data signal strength indicator is greater than the preset threshold, a position angle of the signals is obtained based on the sampled IQ data in the sampled message.