Radar Target Simulator Characterization Without Synchronization
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Solution Overview
Problem
Existing radar target simulators lack accurate and efficient characterization methods, particularly for verifying radar sensors in autonomous driving applications.
Innovation Solution
A system and method utilizing a signal source to provide a known radar signal and a signal receiver to characterize reflected and simulated radar signals in time and frequency shifts, enabling distance and doppler calibration without synchronization, and using measurement devices like time domain reflectometry and spectrum analyzers for precise radar cross section calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional frequency mixing and data processing modules are used for calibration, then the system can perform radar signal processing, but the characterization accuracy and efficiency are insufficient
Solution Approach 1:
The system divides the characterization process into separate functional modules: a signal source for generating radar signals, a radar target simulator for reflecting signals, and a measurement device for characterizing signals. This segmentation allows each component to be optimized independently and improves overall measurement precision and efficiency.
Solution Approach 2:
The patent introduces a measurement device as an intermediary between the radar target simulator and the analysis system. This intermediary device specifically characterizes the reflected and simulated radar signals in time and frequency domains, enabling accurate calibration without requiring complex synchronization protocols.
2Reliability
If traditional calibration methods are used, then radar signals can be processed, but synchronization requirements increase system complexity and reduce efficiency
Solution Approach 1:
The patent extracts the synchronization requirement from the calibration process by using a measurement device that can characterize signals independently. The measurement device captures reflected and simulated signals and processes them without requiring synchronization between the radar target simulator and the measurement system, thereby reducing device complexity while maintaining reliability.
3Adaptability or versatility
If comprehensive signal processing modules are implemented, then more calibration parameters can be measured, but the system complexity increases
Solution Approach 1:
The measurement device is designed with multi-functionality to characterize multiple types of radar signals (reflected and simulated) across different domains (time and frequency). This universal device can measure multiple calibration parameters including distance, velocity, and radar cross section without requiring separate specialized equipment for each parameter, thereby increasing adaptability while controlling system complexity.
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 accurate and efficient characterization of radar target simulators for parameters such as distance, velocity, and radar cross section, enhancing calibration efficiency and eliminating the need for synchronization.
Implementation Method 1
a signal source (11) configured to provide a known radar signal for the radar target simulator (13)
Implementation Method 2
receive the correspondingly reflected radar signal, caused by the known radar signal, from a front of the radar target simulator (13)
Data Source
AI summary
A system for characterizing a radar target simulator is provided. The system includes a signal source that provides a known radar signal for the radar target simulator, and a signal receiver that receives the correspondingly reflected radar signal, caused by the known radar signal, from a front of the radar target simulator, and in addition to receive the correspondingly simulated radar response signal to the known radar signal from the radar target simulator and/or to measure the correspondingly outgoing simulated radar signal as response to the known radar signal from the radar target simulator. The system or the signal receiver characterizes the reflected radar signal and the simulated radar response signal and/or the outgoing simulated radar signal in time and/or frequency shift. The system or the signal receiver characterizes the simulated radar response signal and/or the outgoing simulated radar signal in frequency compared to the reflected radar signal.