Antenna Array Positioning via Reliability-Weighted Phase Difference
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Solution Overview
Problem
Existing techniques for estimating the positional relationship between devices via wireless signals face accuracy issues, particularly in environments with shielding or multipath conditions, where the presence of obstacles like pillars or multiple radio wave paths interferes with signal reception, leading to decreased estimation accuracy.
Innovation Solution
A control device and method that utilize a communication device with four or more antennas, applying a weight parameter based on a reliability parameter to the phase difference between antennas to enhance the accuracy of positional relationship estimation between communication devices, by calculating a reliability parameter indicating the signal's appropriateness for processing and applying it to the phase difference analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless signals are transmitted and received between devices for positional relationship estimation, then the positional relationship can be estimated, but the accuracy decreases in environments with shielding or multipath conditions
Solution Approach 1:
The patent changes the parameter of signal selection by introducing a reliability parameter that evaluates signal quality based on reception power and timing characteristics. By dynamically selecting signals with higher reliability parameters and applying weight parameters based on these reliability values, the system adapts to varying environmental conditions (shielding, multipath) and maintains accurate positional estimation even when some signals are degraded
Solution Approach 2:
The patent implements a feedback mechanism where the reception device evaluates the quality of received signals using reliability parameters, then feeds this information back to the transmission device. The transmission device uses this feedback to adjust which signals to transmit and with what weight parameters, creating a closed-loop system that continuously optimizes positional estimation accuracy despite environmental interference
2Reliability
If multiple signal paths exist between transmission and reception, then signal coverage is improved, but estimation accuracy decreases due to multipath interference
Solution Approach 1:
The patent introduces reliability parameters that evaluate each received signal based on reception power and timing characteristics. By calculating weight parameters from these reliability values, the system can distinguish between direct-path signals (higher reliability) and multipath signals (lower reliability), thereby maintaining measurement precision while still benefiting from multiple signal paths for coverage
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 significantly improves the accuracy of estimating the positional relationship between devices by mitigating the effects of multipath environments and shielding, ensuring more precise distance and angle measurements.
Implementation Method 1
a phase difference between adjacent antennas of the four or more antennas of the communication device
Data Source
AI summary
To estimate a positional relationship between devices having transmitted and received signals with higher accuracy.A control device comprising:a control unit that performs control for estimating a positional relationship between a communication device having four or more antennas and another communication device on the basis of signals transmitted and received between the communication device and the other communication device, whereinthe control unit applies a weight parameter based on a reliability parameter that is an index indicating a degree of whether or not a signal is appropriate as a processing target for estimating a positional relationship between the communication device and the other communication device calculated on the basis of a signal received from the other communication device by the communication device to a phase difference between adjacent antennas of the four or more antennas of the communication device, and performs control for estimating the positional relationship.