Dynamic Echo Signal Emulation for Automotive Radar Testing
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Solution Overview
Problem
Current millimeter wave automotive radar testing environments struggle to emulate highly dynamic scenarios with multiple targets having different echo signal directions, lacking scalability and synchronization capabilities, which can lead to false warnings and accidents.
Innovation Solution
A test system comprising a test controller, scenario simulator, radar target emulator, and channel emulator, with multiple probe arrays and enclosures, allows for dynamic echo signal emulation across power, time, Doppler frequency, and spatial domains, enabling simultaneous and synchronous emulation of multiple targets with varying signal directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single probe antenna is used in an anechoic chamber for OTA testing, then the system can emulate multiple targets in the same direction across all four domains, but it cannot emulate multiple targets with different signal directions and has limited dynamic scenario emulation capability
Solution Approach 1:
The system divides the single probe antenna function into multiple independent probe antennas, with each probe capable of independently emulating targets in different directions. This segmentation allows simultaneous emulation of multiple targets with different signal directions while maintaining domain emulation capabilities
Solution Approach 2:
Each probe antenna is designed with multi-functionality to handle multiple domains (power, time, Doppler frequency, spatial) while simultaneously serving different directional emulation needs. The probe arrays can be dynamically configured to serve various testing scenarios
2Adaptability or versatility
If mechanical rotation of a single probe antenna is used to change signal direction, then the system can emulate different directions, but the mechanical rotation speed limits the dynamic scenario emulation capability
Solution Approach 1:
The patent replaces the mechanical rotation system with an electronic switching system that controls multiple fixed probe antennas. This substitution eliminates mechanical rotation speed limitations and enables rapid dynamic scenario emulation through electronic switching between probes
Solution Approach 2:
The system transitions from a static mechanically-rotated probe to a dynamic electronically-controlled multi-probe array. The electronic switching enables real-time dynamic scenario emulation by rapidly reconfiguring which probe serves which directional emulation need
3Adaptability or versatility
If multiple probe antennas are used to emulate multiple targets with different directions, then the system can improve adaptability, but the system complexity and cost increase significantly
Solution Approach 1:
The patent combines multiple probe antennas into a unified controlled system with centralized control logic. The control system coordinates the multiple probes to work together for multi-target emulation, reducing operational complexity despite the increased number of components
Solution Approach 2:
Instead of using a single complex mechanically-rotatable probe, the system uses multiple simpler fixed probes that copy the essential functionality of the original probe. Each probe is a simplified version that can be statically positioned, reducing individual probe complexity while achieving system-level capability
4Adaptability or versatility
If a scenario emulator with software capability is used to emulate echo signals, then the system can simulate different driving scenarios, but the system lacks scalability and synchronization capabilities for multiple radar sensors
Solution Approach 1:
The system implements feedback mechanisms where the control system receives information from multiple radar sensors and adjusts the echo signal emulation in real-time. This enables synchronized testing of multiple radar sensors while maintaining scenario accuracy and improving testing throughput
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 solution enhances the testing environment's flexibility and scalability, improving the accuracy of radar sensor performance and reducing the risk of accidents by effectively simulating complex driving scenarios.
Implementation Method 1
millimeter wave automotive radar is used in advanced driver-assistance systems to warn of forward collisions and backward collisions
Implementation Method 2
Each of the four radar sensors may have a transmit antenna array and a receive antenna array... the on-vehicle driving controller interprets the received echo signals
Implementation Method 3
Considering that the echo signals need to be dynamically emulated from domains including a power domain, a time domain, a doppler frequency domain and a spatial domain
Data Source
AI summary
A system for testing automobile radar sensor configurations includes multiple probe arrays, multiple enclosures, a channel emulator and a test controller. The enclosures each enclose one of the probe arrays together with a corresponding different automobile radar sensor. Each probe array is configured to receive radar signals from the corresponding automobile radar sensor and emulate echo signals back to the corresponding automobile radar sensor. The channel emulator is configured to supply the echo signals to each of the probe arrays. The test controller includes a memory that stores instructions and a processor that executes the instructions. The test controller controls the channel emulator and is configured to perform performance testing on an automobile radar sensor configuration that includes the automobile radar sensors and an automobile driving controller that reacts to the echo signals received by each of the automobile radar sensors.