Vehicle Radar Angle Estimation via Multi-Mode Signal Merging
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Solution Overview
Problem
Radar systems for vehicle driver assistance often provide unreliable or erroneous object detection, particularly in multi-mode operations where different modulation modes are used, leading to suboptimal measurement quality and angular measurement capability.
Innovation Solution
A method that combines sensing information from multiple modulation modes to improve angle estimation by using multiple antennas for digital beamforming, where radar signals with different modulation modes are emitted and received, and the resulting sensing information is processed through Fourier transformations to determine the angle information, enhancing the signal-to-noise ratio and angular measurement capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensing information from multiple modulation modes is combined, then angle estimation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines sensing information from multiple modulation modes (first modulation mode and second modulation mode) to determine angle information. The processing device integrates the first sensing information resulting from radar signals modulated in accordance with the first modulation mode and the second sensing information resulting from radar signals modulated in accordance with the second modulation mode, thereby improving angle estimation accuracy through merged data from different modulation schemes.
2Measurement precision
If multiple modulation modes are used, then measurement quality is improved, but reliability of object detection deteriorates
Solution Approach 1:
The patent uses the combined sensing information from multiple modulation modes as feedback to improve the reliability of object detection. The processing device determines angle information based on the combined first and second sensing information, and this improved angle information is fed back into the object detection process to enhance measurement quality and reduce erroneous detections in multi-mode operations.
Data Source
AI summary
A method for determining angle information about a direction of a target object in a radar system for a vehicle, wherein the following steps are performed: providing a first item of sensing information for a first modulation mode of the radar system, providing at least one second item of sensing information for at least a second modulation mode of the radar system, and combining the sensing information for the different modulation modes in order to perform the determination of the angle information on the basis of the combined sensing information.