Vehicle Radar APS Analysis for Multi-Object Detection
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Solution Overview
Problem
Existing radar systems mounted on vehicles struggle to accurately detect multiple objects due to limited detection angles, which are determined by the mounting specification, and low-function specification radars may fail to detect objects effectively.
Innovation Solution
A radar control device and method that determines an angular power spectrum (APS) for a predetermined frequency based on vehicle driving information from the radar, allowing for the detection of multiple objects by analyzing the position of measurement values derived from the APS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a radar with low function specification is mounted on a vehicle, then the device complexity is reduced, but the detection capability for multiple objects deteriorates
Solution Approach 1:
The radar control device performs preliminary actions by determining the angular power spectrum (APS) before object determination. The APS is calculated in advance for multiple frequency bins, and this pre-computed spectral information is then used to identify multiple objects even with limited detection angles, thereby compensating for the low specification radar's limitations without adding hardware complexity
Solution Approach 2:
The invention transforms the detection approach from spatial dimension (detection angle) to frequency dimension by utilizing angular power spectrum analysis. By converting spatial detection limitations into frequency domain analysis, the system can distinguish multiple objects based on their spectral signatures even when their angular separation is below the radar's detection threshold
2Ease of operation
If the detection angle of the radar is limited by mounting specification, then the ease of installation is improved, but the quantity of detectable objects deteriorates
Solution Approach 1:
The system performs preliminary spectral analysis by determining the angular power spectrum across multiple frequency bins before object identification. This pre-computation of APS allows the radar to extract additional information from the same limited angular data, enabling detection of multiple objects without requiring a wider physical detection angle or more complex antenna installation
Solution Approach 2:
The angular power spectrum acts as an intermediary that transforms the limited angular detection data into enhanced object detection capability. By introducing this spectral analysis layer, the system can distinguish multiple objects based on their frequency-domain characteristics even when their angular separation is insufficient for direct spatial resolution
Data Source
AI summary
The embodiments of the present disclosure relate to a radar control device and method. Specifically, a radar control device according to the present disclosure may include a receiver for receiving vehicle driving information for a host vehicle from a radar, an APS determiner for determining an angular power spectrum (APS) for a predetermined frequency based on the vehicle driving information if an object is detected in the vehicle driving information, and an object determiner for determining a position of a measurement value based on the determined APS, and determine whether there are a plurality of objects based on the position of the measurement value.