Vehicle Radar Interference Elimination via Phase Response Reconstruction
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Solution Overview
Problem
Radar systems in vehicles face interference from other radar systems operating in overlapping frequency ranges, leading to signal disruption and loss of useful signal due to existing methods like zero-padding, which are inefficient in eliminating interference without losing parts of the useful signal.
Innovation Solution
A method and device for radar systems that involve deriving the reception signal, ascertaining parameters of the interference signal, reconstructing it, and eliminating it, using techniques such as determining extreme values and slope of the phase response to isolate and remove the interference, potentially without requiring an IQ mixer and by estimating zero phase angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If zero-padding and curve fitting methods are used to eliminate interference, then interference is reduced, but useful signal is lost
Solution Approach 1:
The patent extracts and isolates the interference signal component from the reception signal by analyzing extreme values and deriving chronological phase response, then removes only this extracted interference portion while preserving the useful signal
Solution Approach 2:
The patent converts the harmful interference signal into a beneficial diagnostic tool by using its extreme values and phase characteristics to identify and model the interference, thereby transforming the problem into a solution mechanism
2Measurement precision
If interference elimination methods are applied, then detection accuracy improves, but signal processing complexity increases
Solution Approach 1:
The system performs self-diagnosis by automatically identifying interference signals through their inherent extreme value characteristics and phase response patterns, eliminating the need for external calibration or manual intervention
3Manufacturing precision
If IQ mixer is used for signal processing, then interference elimination precision improves, but hardware requirements increase
Solution Approach 1:
The patent creates a mathematical model (copy) of the interference signal based on extreme value analysis and phase response derivation, then uses this model to eliminate the actual interference without requiring physical hardware modifications
Data Source
AI summary
A method for operating a radar system of a motor vehicle includes receiving a reception signal, deriving the reception signal from time, ascertaining parameters of an interference signal from the derived reception signal, reconstructing the interference signal from the parameters, and eliminating the interference signal from the reception signal.