Multi-Antenna Signal Correlation for Obstructed Angle Estimation
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Solution Overview
Problem
Existing technologies for estimating the angle of incidence of wireless signals, such as those using UWB, face accuracy issues when obstacles are present, leading to reduced positioning accuracy.
Innovation Solution
A communication device with multiple wireless communication sections and a control section that correlates signals to detect specific elements with high correlation values, allowing for the identification of direct waves and improving positioning accuracy by adjusting the communication sections to optimize signal detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional angle of incidence estimation technology is used, then positioning can be performed, but accuracy deteriorates when obstacles are interposed between transmitter and receiver
Solution Approach 1:
The patent divides the signal detection process into multiple segments by using multiple wireless communication sections (antennas) arranged in specific geometric patterns. Each antenna independently detects signals, and the system segments the correlation computation into multiple results from different antenna pairs, allowing robust angle estimation even when some paths are obstructed
Solution Approach 2:
The patent transitions from single-path signal detection to multi-dimensional spatial detection by arranging multiple antennas in two-dimensional configurations. This dimensional expansion allows the system to detect signals from multiple spatial directions simultaneously, providing redundancy when obstacles block certain paths
2Measurement precision
If multiple wireless communication sections are used to improve accuracy, then position estimation accuracy improves, but device complexity increases
Solution Approach 1:
The patent merges the detection results from multiple wireless communication sections through correlation computation. By combining the correlation results from different antenna pairs and synthesizing them into a unified angle estimation, the system achieves high accuracy without requiring each individual antenna to be overly complex
Solution Approach 2:
Each wireless communication section is designed with universal functionality to perform correlation computation with the transmitted signal. This multi-functional approach allows the same hardware configuration to serve multiple detection purposes, reducing overall system complexity while maintaining high measurement precision
Data Source
AI summary
A communication device includes: a plurality of wireless communication sections, each of which is configured to wirelessly receive a signal from another communication device; and a control section configured to perform a detection process of detecting specific elements with regard to a plurality of correlation computation results, each of which is obtained by correlating a first signal that is transmitted from the other communication device and each of second signals at the designated interval and includes a correlation value indicating magnitude of correlation between the first signal and the second signal as an element obtained at the designated interval, and control a change process of treating a wireless communication section having earliest time corresponding to the specific element as a first wireless communication section among the plurality of wireless communication sections, treating the other wireless communication section as a second wireless communication section among the plurality of wireless communication sections.