Relative Wireless Positioning Using Phase-Shift-Insensitive Channel Vectors
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Solution Overview
Problem
Current wireless communication systems, particularly MU-MIMO systems, face complexity and high implementation costs due to existing charting methods for determining the location of multiple electronic apparatuses, which involve complex feature extraction processes.
Innovation Solution
A method for relative positioning of electronic apparatuses using vector estimation, phase-shift analysis, and distance determination to calculate minimum distances between apparatuses, followed by a size reduction process to derive position indicators, optimizing the positioning process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If feature extraction is performed for each electronic apparatus to generate location charts, then positioning accuracy is improved, but device complexity and implementation cost increase significantly
Solution Approach 1:
The patent segments the complex feature extraction process into simpler vector operations. Instead of performing comprehensive feature extraction for each apparatus, the system divides the problem into vector estimation, phase-shift analysis, and distance calculation components, reducing overall complexity while maintaining positioning accuracy
Solution Approach 2:
The patent changes the parameters used for positioning from complex extracted features to simplified vector representations with phase-shift analysis. By transforming the problem into determining minimum distances between vectors under phase shifts, the system reduces computational complexity while preserving measurement precision
2Measurement precision
If feature extraction is performed for each electronic apparatus to generate location charts, then positioning accuracy is improved, but implementation cost increases
Solution Approach 1:
The patent employs computationally inexpensive vector operations and distance calculations instead of expensive feature extraction processes. By using simple vector norms, phase-shift determinations, and minimum distance calculations, the system achieves positioning accuracy at a fraction of the implementation cost of traditional charting methods
3Loss of information
If traditional charting methods are used to determine location of multiple apparatuses, then positioning information is obtained, but the process becomes complex and expensive with large numbers of antennas
Solution Approach 1:
The patent creates a universal positioning method that works efficiently regardless of the number of antennas or apparatuses involved. The vector-based approach with phase-shift analysis provides a scalable solution that maintains constant complexity per apparatus, making the system universally applicable to MU-MIMO configurations of any size
Solution Approach 2:
The patent transitions from traditional spatial charting to a vector space representation with phase-shift dimensions. By analyzing minimum distances in this extended vector space rather than direct spatial coordinates, the system reduces complexity while preserving all necessary positioning information
Data Source
AI summary
A method for relative positioning of electronic apparatuses in communication with a communication device establishing a set of communication channels through which the device exchanges electromagnetic signals with each electronic apparatus includes, for each electronic apparatus, estimating a vector for which the elements represent, respectively, transmission through the communication channels between the device and the respective electronic apparatus, for at least first and second electronic apparatuses, determining a minimum distance from the distances existing, for all possible phase-shift values, between a first vector having a predetermined norm which is colinear to the vector estimated for the first electronic apparatus, and a second vector having the predetermined norm which is colinear to the vector estimated for the second electronic apparatus and modified by applying a phase shift having a value among the possible values, and determining a position indicator for the first electronic apparatus based on the determined distance.