Vehicular Radar Multi-Frequency Transmitter Segmentation
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Solution Overview
Problem
Existing vehicle sensing systems using radar and imaging sensors face challenges in simultaneously operating driving assistance systems and vehicle-to-vehicle or vehicle-to-infrastructure communication without interference, as they typically operate at different frequency ranges.
Innovation Solution
A vehicle sensing system employing multiple transmitters and receivers capable of operating at both high frequencies for driving assistance (e.g., 76-81 GHz) and lower frequencies for V2V/V2X communication (e.g., 1-3 GHz), allowing simultaneous operation without interference by using dedicated channels and frequencies defined by regulatory standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar sensors operate at high frequencies for driving assistance systems, then measurement precision for object detection is improved, but interference with vehicle-to-vehicle or vehicle-to-infrastructure communication occurs
Solution Approach 1:
The radar sensor system is segmented into multiple independent transmitter units, each capable of operating at different frequency ranges. This allows the system to separate driving assistance radar operations from V2V/V2X communication operations into distinct frequency segments, eliminating interference between the two functions while maintaining high measurement precision for object detection.
2Reliability
If separate systems are used for driving assistance and V2V/V2X communication, then functional reliability is improved, but device complexity increases
Solution Approach 1:
The radar sensor system is designed with multi-functionality, where a single integrated sensor unit can perform both driving assistance radar detection and V2V/V2X communication tasks. The transmitters are configured to operate at multiple frequency ranges, allowing one system to fulfill multiple functions that would traditionally require separate dedicated systems, thereby reducing overall device complexity while maintaining functional reliability.
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
Enables vehicles to simultaneously perform driving assistance tasks and communicate with other vehicles or infrastructure, sharing data like GPS and status information without disrupting each other's operations, enhancing safety and autonomous driving capabilities.
Implementation Method 1
each transmitter can transmit at a first frequency and a second frequency... The receivers receive radio signals at the first frequency that are reflected off objects... The receivers receive radio signals at the second frequency that are transmitted from transmitters remote from the vehicle
Implementation Method 2
The receivers receive radio signals at the first frequency that are reflected off objects to determine presence of an object exterior of the vehicle
Data Source
AI summary
A vehicular radar sensing system includes a radar sensor disposed at a vehicle so as to sense exterior of the vehicle, and a control. The radar sensor includes a plurality of transmitters that transmit radio signals, and a plurality of receivers that receive radio signals. The transmitters transmit first radio signals at a first frequency and second radio signals at a second frequency, with the second frequency different from the first frequency. First radio signals received are transmitted first radio signals from the plurality of transmitters that are reflected from an object exterior the vehicle. The control, via processing of the received first radio signals, determines presence of an object exterior of the vehicle. The transmitters transmit second radio signals at the second frequency for receiving at a remote communication device. Second radio signals received at the transmitter are second radio signals transmitted by the remote communication device.