Symmetric Transmitter Array for Accurate Position Estimation
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Solution Overview
Problem
Existing position estimation systems face challenges in accurately estimating the position of a transmitter in environments with changing radio wave reception environments and multipath phasing, and require time-consuming statistical processing, making real-time estimation difficult, especially when directivities of radio waves are non-uniform.
Innovation Solution
A position estimation system with a transmission device having multiple transmitters arranged symmetrically around a reference position and receivers that analyze reception strengths to estimate the position, reducing variations in directivity and eliminating the need for complex statistical processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple transmitters are arranged symmetrically with respect to a reference position, then position estimation accuracy is improved and directivity variations are reduced, but device complexity increases
Solution Approach 1:
The patent applies asymmetry in reverse by using symmetric arrangement of transmitters around a reference position. This symmetric configuration compensates for directivity variations and environmental influences, improving position estimation accuracy despite the increased structural complexity.
Solution Approach 2:
The patent changes the spatial parameter of transmitter arrangement by positioning multiple transmitters symmetrically with respect to a reference position. This parameter change addresses directivity variations and improves measurement precision while managing the associated complexity.
2Measurement precision
If statistical processing is performed on reception strengths, then position estimation accuracy is improved, but processing time increases making real-time estimation difficult
Solution Approach 1:
The patent extracts and eliminates the need for complex statistical processing by using symmetric transmitter arrangement. The symmetry inherently compensates for variations, allowing real-time estimation without time-consuming statistical calculations while maintaining accuracy.
Solution Approach 2:
The patent replaces the mechanical processing system (statistical calculations) with a geometric solution (symmetric arrangement). This substitution eliminates the time-consuming processing while preserving the accuracy benefits.
3Measurement precision
If measurements are performed frequently to account for changing reception environments, then position estimation accuracy is improved, but loss of time and processing overhead increase
Solution Approach 1:
The patent provides beforehand cushioning by arranging transmitters symmetrically, which pre-compensates for environmental variations and reception changes. This prior configuration reduces the need for frequent remeasurements while maintaining accuracy under changing conditions.
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
This approach enhances position estimation accuracy, reduces susceptibility to environmental influences, and enables real-time and accurate positioning without requiring frequent measurements or complex calculations.
Implementation Method 1
a plurality of transmitters arranged symmetrically with respect to a specific reference position; a plurality of receivers that receive radio waves transmitted from the plurality of transmitters
Data Source
AI summary
The position of a transmission device is estimated with a sufficient accuracy. A position estimation system includes a transmission device that includes a plurality of transmitters arranged symmetrically with respect to a specific reference position, a plurality of receivers that receive radio waves transmitted from the plurality of transmitters, and an estimation tool that estimates the position of the transmission device, based on reception strengths of the radio waves received at the receivers.