UWB Device Selection Using Dual-AOA and Signal Status Checks

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Solution Overview

Problem

UWB technology inaccurately determines that a device is directly in front of the UWB component, leading to incorrect device selection due to large-angle misjudgment.

Innovation Solution

Determine a first and second angle of arrival (AOA) of a signal from a target device, and analyze the signal status to ensure the angles are within a preset range, using methods such as line of sight transmission, received signal strength indication (RSSI), and signal-noise ratio (SNR) to accurately select the target device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If UWB technology uses AOA to determine device position, then device positioning capability is improved, but measurement precision deteriorates due to large-angle misjudgment

Engineering Contradiction:

Improvedevice positioning accuracyVSAvoiddevice selection accuracy

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent introduces a feedback mechanism by analyzing the signal status between terminal and target device. The system determines whether the signal transmission status meets a preset condition (such as line-of-sight requirement), and uses this feedback to verify and correct the AOA-based positioning result, preventing large-angle misjudgment and improving device selection accuracy

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent changes the parameter verification approach by not only relying on AOA values but also introducing signal status parameters (such as line-of-sight detection, signal strength thresholds). This multi-parameter verification system transforms the single-parameter AOA judgment into a composite judgment mechanism, resolving the precision-reliability contradiction

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the system expands the angle detection range to cover more directions, then adaptability is improved, but measurement precision deteriorates due to increased misjudgment risk

Engineering Contradiction:

Improvedetection coverage rangeVSAvoidangle measurement accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent applies local quality principle by implementing different verification standards for different angular regions. For angles within the preset range (e.g., -30° to 30°), the system applies standard AOA detection. For angles approaching the boundaries or exceeding the preset range, the system activates additional signal status verification (line-of-sight detection, RSSI threshold checks), creating a localized quality enhancement that maintains precision across the expanded detection range

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12520265B2Device determining method, electronic device, and computer-readable storage medium

Publication Date: 2026.01.06 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A device determining method, an electronic device, and a computer-readable storage medium are provided. The method includes: determining a first angle of arrival (AOA) of a signal from a target device in a first direction and a second AOA of the signal in a second direction; acquiring a status of the signal between the terminal and the target device in response to determining that the first AOA and the second AOA are within a first preset angle range; and determining the target device as a device to be selected according to the status of the signal between the terminal and the target device.