Radar Signal Correction Using Auxiliary Peak Interpolation
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Solution Overview
Problem
Radar systems face interference issues due to increasing vehicle density, leading to unwanted lateral influences and artifacts in radar signals, particularly in continuous wave radar systems operating in the 76 GHz band, where interference areas can result in significant artifacts when corrected by zeroing or linear interpolation.
Innovation Solution
A method for correcting radar signals by determining main peaks in the spectrum, generating an auxiliary signal by removing these peaks, and interpolating the radar signal in interference areas using the main peaks to create a smooth, artifact-reduced corrected signal, which depends less on the size of the interference area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional zeroing or linear interpolation methods are used to correct interference areas in radar signals, then the correction process is simple, but strong artifacts are generated that increase with the size of interference zones
Solution Approach 1:
The patent introduces an auxiliary signal as an intermediary element that preserves the characteristics of main peaks while removing interference components. This auxiliary signal serves as a mediator between the original radar signal and the corrected signal, allowing artifact-free interpolation in interference zones without requiring complex correction algorithms.
Solution Approach 2:
The patent performs preliminary identification and removal of main peaks from the radar signal to generate the auxiliary signal before interference correction. This preliminary action preserves the essential signal characteristics that need to be maintained during subsequent interpolation in interference areas, preventing artifact generation.
2Object-affected harmful factors
If interference areas are removed from the radar signal, then interference suppression is achieved, but the longer the time interval removed, the stronger the artifacts that occur
Solution Approach 1:
The auxiliary signal acts as a intermediary that bridges the gap created by removing interference areas. By using the auxiliary signal for interpolation in extended interference zones, the patent maintains signal continuity and prevents the generation of strong artifacts that would otherwise occur with long interference intervals.
Solution Approach 2:
The patent changes the interpolation parameter from simple zeroing or linear interpolation to interpolation based on the auxiliary signal that preserves main peak characteristics. This parameter change allows the correction method to handle long interference intervals without generating artifacts.
3Power
If the radar signal is corrected by setting interference zones to zero or linear interpolation, then the correction is computationally simple, but strong artifacts are generated that would increase with the size of the interference zones
Solution Approach 1:
The patent performs preliminary extraction of main peaks to create the auxiliary signal before the interpolation step. This preliminary action ensures that the subsequent interpolation process, while more complex than simple zeroing, only needs to combine pre-extracted peak information with the original signal, rather than performing complex artifact suppression during the correction itself.
Data Source
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AI summary
The invention relates to a method for correcting a radar signal (3), comprising the steps: determining main peaks (41 to 46) in the spectrum of the radar signal (3); determining an auxiliary signal (5) by removing the components of the main peaks (41 to 46) in the radar signal (3); detecting regions of interference (6) of the radar signal (3) by using the auxiliary signal (5); and generating a corrected radar signal (3) by interpolating the radar signal (3) in the detected regions of interference (6) by using the detected main peaks (41 to 46).