Wireless AOA Positioning With Single-Packet Training Signals
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Solution Overview
Problem
Existing wireless local area network (WLAN) positioning methods face challenges in achieving high-accuracy angle-of-arrival (AOA) measurements due to the need for increased antennas and radio frequency transceiver channels, leading to high costs and potential measurement errors.
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 separate transmission packets, then measurement accuracy is improved, but network resource occupation and communication time increase
Solution Approach 1:
The patent combines multiple AOA measurements into a single transmission packet by adding extended positioning information (mLTF) to the original LTF. This merging approach allows the positioning node to perform multiple AOA measurements using one packet, thereby improving measurement accuracy without increasing communication time or network resource occupation.
Solution Approach 2:
The extended positioning information in the transmission packet serves multiple functions: it provides additional training symbols for enhanced AOA measurements, maintains compatibility with existing protocols, and enables both conventional and improved positioning modes within the same packet structure.
2Measurement precision
If multiple antennas and radio frequency transceiver channels are added to improve AOA positioning accuracy, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent changes the parameters of the transmission packet by adding extended positioning information with additional training symbols. This parameter change enables the positioning node to perform multiple AOA measurements using the same antenna and transceiver channel, thereby improving measurement precision without increasing device complexity or hardware requirements.
3Measurement precision
If extended positioning information is added to transmission packets, then AOA measurement accuracy is improved, but packet size and processing complexity increase
Solution Approach 1:
The extended positioning information is segmented into multiple sub-extended positioning information pieces, each containing training symbols for specific antenna groups. This segmentation allows the positioning node to process different segments using corresponding antenna groups, improving AOA measurement accuracy while managing packet processing complexity through structured organization.
Data Source
AI summary
Embodiments of this application provide a wireless connection positioning method and apparatus, 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.