Antenna Array Deviation Correction for Indoor Positioning
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Solution Overview
Problem
Satellite navigation and positioning technologies are ineffective in sheltered and indoor environments due to low signal power and weak penetration, limiting their application to open outdoor environments, and existing wireless communication systems face challenges in accurately determining positioning parameters like Time of Flight (ToF) and Angle of Arrival (AoA) at large angles.
Innovation Solution
A method and apparatus that determine positioning parameters by correcting the ideal spatial manifold matrix using a preset antenna array deviation function, allowing for accurate calculation of Line Of Sight (LOS) based on Time of Flight spectrum data and improved AoA estimation, reducing computational complexity and enhancing real-time positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If satellite navigation and positioning technology is used, then wide area coverage and good generalizability are achieved, but positioning cannot be provided in sheltered environments and indoor environments due to low signal power and weak penetration
Solution Approach 1:
The patent introduces wireless communication base stations as intermediary devices to transmit positioning signals in environments where satellite signals cannot penetrate. These base stations act as mediators between the positioning system and terminals in sheltered/indoor environments, enabling positioning where direct satellite reception is impossible.
2Reliability
If basic facilities of wireless communication system are used for positioning, then positioning service in sheltered and indoor environments is enabled, but measurement accuracy deteriorates at large angles due to antenna array deviations
Solution Approach 1:
The patent performs preliminary calibration to determine antenna array deviation parameters before actual positioning operations. By pre-characterizing the antenna array's actual radiation patterns and deviations, the system can compensate for these effects during positioning, thereby maintaining measurement accuracy at large angles.
Solution Approach 2:
The patent transforms the positioning calculation by incorporating antenna array deviation parameters into the spatial manifold matrix. This parameter transformation allows the system to account for real antenna behavior rather than assuming ideal patterns, improving accuracy in non-ideal conditions.
3Measurement precision
If space-time super-resolution algorithm is used to determine positioning parameters, then positioning parameters ToF and AoA can be determined, but computational complexity increases
Solution Approach 1:
The patent performs preliminary calibration to obtain antenna array deviation parameters before actual positioning operations. By pre-characterizing the antenna array's actual radiation patterns and deviations, the system can compensate for these effects during positioning, thereby maintaining measurement accuracy at large angles.
Solution Approach 2:
The patent transforms the positioning calculation by incorporating antenna array deviation parameters into the spatial manifold matrix. This parameter transformation allows the system to account for real antenna behavior rather than assuming ideal patterns, improving accuracy in non-ideal conditions.
Data Source
AI summary
Provided are a method and apparatus for determining a positioning parameter, a computer device and a storage medium. The method includes: determining Time of Flight (ToF) spectrum data of a positioning signal according to the positioning signal sent via multi-channels by a terminal to be positioned; correcting an ideal spatial manifold matrix according to a preset antenna array deviation function, so as to obtain a corrected spatial manifold matrix; and determining a positioning parameter of Line Of Sight (LOS) of the positioning signal according to the ToF spectrum data and the corrected spatial manifold matrix, wherein the LOS is the shortest path from the terminal to be positioned to the antenna array.