Vehicle Position Estimation Under Radar Communication Interference
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Solution Overview
Problem
The proximity of millimeter wave radars and communication devices in vehicles can lead to interference, affecting the accuracy of position estimation of mobile terminals due to radio wave noise, which is particularly problematic as the number of these devices increases and their proximity increases.
Innovation Solution
A position estimation system that includes a scene determination unit to identify simultaneous operation scenarios of millimeter wave radars and communication devices, with an operating mode changing unit to adjust the operation of these devices to minimize interference, and a vehicle communication device with a shield portion to block radio waves from millimeter wave radars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If millimeter wave radars and communication devices are disposed in proximity in vehicles, then the number of devices can be increased and space utilized efficiently, but radio wave interference occurs affecting position estimation accuracy
Solution Approach 1:
A shield portion is introduced as an intermediary element between the millimeter wave radar and the communication device. This shield blocks or attenuates radio waves from the radar, preventing interference with the communication device's position estimation function, thereby allowing both devices to operate in proximity without compromising accuracy
Solution Approach 2:
The shield portion is strategically positioned only in the specific region where radio wave interference occurs between the radar and communication device. This localized shielding approach maintains device density while precisely addressing the interference problem only where needed, rather than requiring complete separation of devices
2Measurement precision
If multiple communication devices are installed at multiple locations in the vehicle, then position estimation accuracy is improved, but the risk of interference with millimeter wave radar increases
Solution Approach 1:
Shield portions are selectively installed at specific communication device locations where interference with the millimeter wave radar occurs. Not all communication devices require shielding—only those in proximity to the radar, allowing multi-location deployment for accuracy while minimizing interference through targeted local protection
Solution Approach 2:
The shield acts as a mediator that allows multiple communication devices to operate near the millimeter wave radar without suffering interference. The shield blocks harmful radio waves while permitting the communication devices to maintain their optimal positions for accurate position estimation
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
The system effectively reduces interference between millimeter wave radars and communication devices, maintaining accurate position estimation of mobile terminals by adjusting operating modes and using a shield to mitigate radio wave interference.
Implementation Method 1
a vehicle communication device with a shield portion to block radio waves from millimeter wave radars
Data Source
AI summary
A position estimation system includes: a position estimation unit configured to estimate a position of a mobile terminal based on a reception status of signals that are transmitted from the mobile terminal and received by a plurality of communication devices; a scene determination unit configured to determine, based on information from a sensor mounted in a vehicle, whether a current status is a simultaneous operation scene in which both a millimeter wave radar and a radar vicinity device are operable simultaneously; and an operating mode changing unit configured to change an operating mode of at least one of the millimeter wave radar, the communication device, or the position estimation unit in response to the scene determination unit determining that the current status is the simultaneous operation scene.