Smart Key Positioning With AOA-UWB Fusion and Single Anchor
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Solution Overview
Problem
Existing smart key positioning technologies, such as Bluetooth and UWB, suffer from low accuracy and high deployment costs due to the need for multiple anchors, with Bluetooth providing only meter-level precision and UWB requiring complex model calibration and multiple installations.
Innovation Solution
A smart key positioning system utilizing a fusion tag and a fusion base station, enabling precise positioning with a single anchor by broadcasting and receiving positioning signals to determine angle and distance information, employing AOA and UWB techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple Bluetooth anchors are deployed for positioning, then positioning coverage is improved, but positioning accuracy remains only at meter level and deployment cost increases
Solution Approach 1:
The patent combines AOA (Angle of Arrival) and UWB (Ultra-Wide Band) technologies into a fusion positioning system. The AOA module determines angular information from signal arrival directions, while the UWB module measures distance through time of flight. By merging these two complementary measurement methods, the system achieves sub-meter positioning accuracy with only a single anchor, eliminating the need for multiple anchors required by traditional Bluetooth or standalone UWB systems.
Solution Approach 2:
The patent introduces a positioning tag as an intermediary device that carries both AOA and UWB modules. This tag acts as a mediator between the single anchor and the positioning apparatus, enabling the system to extract both angular and distance information from a single anchor's signals. The intermediary tag processes and transmits combined positioning data, allowing high-precision localization without requiring multiple anchors.
2Measurement precision
If multiple UWB anchors are installed for geometric positioning, then positioning accuracy is improved, but deployment complexity and cost increase
Solution Approach 1:
The patent merges AOA and UWB technologies to create a fusion positioning system that achieves sub-meter accuracy with a single anchor. The AOA module captures angular information from signal arrival directions, while the UWB module measures distance through time of flight. This combination allows the system to perform precise geometric positioning with only one anchor, dramatically reducing deployment complexity compared to traditional UWB systems that require multiple anchors for triangulation.
Solution Approach 2:
The patent segments the positioning function into two independent modules within the tag: an AOA module for angular measurement and a UWB module for distance measurement. This segmentation allows each module to operate independently and process different types of information from the single anchor, then combine the results to achieve high-precision positioning. The modular design simplifies deployment by eliminating the need for multiple anchors while maintaining positioning accuracy.
3Ease of operation
If Bluetooth-based positioning is used, then deployment is simplified, but positioning accuracy is insufficient for precise location requirements
Solution Approach 1:
The patent combines AOA and UWB technologies into a fusion positioning system that maintains deployment simplicity while achieving sub-meter accuracy. The AOA module determines angular information from signal arrival directions, and the UWB module measures distance through time of flight. By merging these two complementary measurement methods, the system achieves precise positioning with only a single anchor, eliminating the need for multiple anchors required by traditional Bluetooth or standalone UWB systems.
Solution Approach 2:
The patent uses a composite positioning approach by integrating AOA and UWB modules into a single tag device. This composite system leverages the strengths of both technologies: AOA provides angular precision and UWB provides distance measurement capability. The composite design enables the system to achieve sub-meter positioning accuracy while maintaining the simplicity of single-anchor deployment, overcoming the limitations of Bluetooth-based positioning.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Achieves high-precision positioning with a single anchor, reducing deployment complexity and costs while improving positioning performance across various scenarios.
Implementation Method 1
determining angle information of the vehicle-mounted positioning tag according to the first positioning signal
Implementation Method 2
determining distance information of the vehicle-mounted positioning tag according to the second positioning signal and the third positioning signal
Data Source
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AI summary
The present application discloses a positioning method, apparatus, and system for a smart key, an electronic device, and a medium. The method is implemented by means of the smart key positioning system. The method is applied to a vehicle-mounted positioning apparatus and comprises: receiving a first positioning signal, and determining angle information of a vehicle-mounted positioning tag according to the first positioning signal; receiving a second positioning signal and a third positioning signal, and determining distance information of the vehicle-mounted positioning tag according to the second positioning signal and the third positioning signal; and determining position information of the vehicle-mounted positioning tag according to the angle information and the distance information. In the present application, a fusion tag and a fusion base station are used, and accurate positioning of a vehicle key can be implemented only by installing one anchor point on a vehicle; and compared with the prior art, the deployment difficulty is reduced while the positioning effect is improved, and the application scenario is wide.