WLAN AOA Positioning Using Extended mLTF Training Symbols
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Solution Overview
Problem
Existing wireless local area network (WLAN) technologies face challenges in achieving high-accuracy positioning due to the need for increased antennas and radio frequency transceiver channels, leading to high costs and potential measurement errors in angle-of-arrival (AOA) calculations.
Innovation Solution
A wireless connection positioning method that includes adding extended positioning information (mLTF) to transmission packets, allowing for multiple angle-of-arrival measurements using a single packet, and switching between antenna groups to improve accuracy and reduce noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple angle-of-arrival measurements are performed using multiple transmission packets, then positioning accuracy is improved, but communication overhead and time consumption increase
Solution Approach 1:
The patent combines multiple angle-of-arrival measurements into a single transmission packet by incorporating extended positioning information (mLTF) that contains multiple training symbols. This allows the receiving end to perform multiple AOA measurements simultaneously from one packet, achieving improved positioning accuracy without increasing communication overhead or time consumption
Solution Approach 2:
The extended positioning information field in the transmission packet serves multiple functions: it carries traditional positioning data and simultaneously provides additional training symbols for multiple AOA measurements. This multi-functional design enables the system to achieve enhanced positioning accuracy without requiring separate dedicated measurement packets
2Measurement precision
If multiple transmission packets are exchanged for AOA measurements, then positioning accuracy is improved, but communication overhead and cost increase
Solution Approach 1:
The patent merges multiple AOA measurement capabilities into a single transmission packet by adding extended positioning information containing multiple training symbols. This eliminates the need for multiple separate packet exchanges, thereby reducing communication overhead while maintaining improved positioning accuracy
Solution Approach 2:
The extended positioning information is prepared in advance within the transmission packet structure, containing multiple training symbols that enable subsequent multiple AOA measurements without requiring additional packet exchanges. This preliminary preparation reduces real-time communication overhead
3Measurement precision
If antenna array size is increased to improve AOA measurement accuracy, then positioning precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses periodic training symbols within the extended positioning information to enable multiple AOA measurements using the same antenna array. By utilizing time-division multiplexing of training symbols, the system achieves improved measurement accuracy without increasing the physical antenna array size or complexity
Solution Approach 2:
The patent changes the temporal parameters of signal transmission by incorporating multiple training symbols at different time instances within the same packet. This allows the system to gather multiple AOA measurements using the same hardware configuration, improving accuracy without increasing device complexity
Data Source
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AI summary
Embodiments of this application provide a wireless connection positioning method and apparatus, a node, a storage medium, and a program product. The wireless connection positioning method is applied to a positioning node and includes: receiving a transmission packet sent by a to-be-measured node, where the transmission packet includes a first indication, the first indication is used to indicate a target angle-of-arrival measurement, and the transmission packet further includes extended positioning information; and measuring an angle of arrival for the to-be-measured node based on the extended positioning information.