Vehicle Radar Phase Correction for False Target Suppression
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Solution Overview
Problem
The integration of radar systems in vehicles increases the risk of misrecognizing noise signals as targets, particularly in autonomous vehicles, leading to potential safety issues like emergency braking.
Innovation Solution
A radar device with array antennas and a signal processor that corrects the phase of noise signals using phase information from feeding lines to detect false targets at specific angles outside the detection area, preventing them from interfering with target detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the degree of integration of the radar system is increased, then the module size is reduced for vehicle mounting, but the risk of noise signals being introduced into radar signals increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing phase correction values in a lookup table before noise signals are detected. When noise is detected, the corresponding phase correction value is immediately retrieved and applied, preventing the noise from affecting target detection. This proactive approach resolves the contradiction by preparing countermeasures in advance while maintaining the integrated compact design.
Solution Approach 2:
The patent converts the harmful noise signal into a beneficial detection opportunity. By detecting the phase of noise signals and calculating corresponding phase correction values, the system transforms noise from a harmful interference into useful information for improving detection accuracy. The noise phase detection mechanism allows the system to adaptively correct for interference while maintaining compact integration.
2Measurement precision
If noise signals are detected and corrected, then the accuracy of target detection is improved, but the complexity of the signal processing increases
Solution Approach 1:
The patent reduces processing complexity through preliminary action by pre-calculating phase correction values and storing them in a lookup table based on noise phase angles. When noise is detected, the system simply retrieves the pre-computed correction value rather than performing complex real-time calculations. This approach maintains high detection accuracy while significantly reducing the computational burden and signal processing complexity.
Solution Approach 2:
The patent uses a lookup table that stores pre-computed phase correction values as copies of calculated data. Instead of recalculating complex phase corrections for each noise detection event, the system copies the appropriate correction value from the lookup table based on the detected noise phase. This copying mechanism maintains measurement precision while avoiding the complexity of repeated calculations.
3Reliability
If phase correction is applied to noise signals, then false targets are eliminated from the detection area, but the processing time increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating phase correction values for various noise phase angles and storing them in a lookup table. When noise is detected, the system immediately retrieves the corresponding pre-computed correction value, eliminating the need for time-consuming real-time calculations. This approach ensures reliable false target elimination while minimizing processing time delays.
Solution Approach 2:
The system performs self-service by automatically detecting noise phases, retrieving corresponding correction values from the lookup table, and applying corrections without requiring complex external processing. This autonomous operation eliminates false targets reliably while minimizing the time lost to external computational resources.
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 approach enhances driving stability by minimizing the detection of false targets, thereby reducing the risk of unsafe vehicle responses.
Implementation Method 1
a feeding part for correcting phases of the radar signal and the reflected signal through a feeding line connecting the antenna part and the signal processor
Implementation Method 2
a signal processor for detecting a target by processing a radar signal and a reflected signal transmitted and received through the antenna part
Data Source
AI summary
The radar device for a vehicle according to an exemplary embodiment of the present invention includes an antenna part including a plurality of transmitting antennas and a plurality of receiving antennas, the antenna part being formed of array antennas; a signal processor for detecting a target by processing a radar signal and a reflected signal transmitted and received through the antenna part; and a feeding part for correcting phases of the radar signal and the reflected signal through a feeding line connecting the antenna part and the signal processor, wherein the signal processor corrects a phase of a noise signal based on the phase information of a feeding line designed such that a false target corresponding to the noise signal incoming is detected at a specific angle.