Multi-Antenna Radar Processing with Two-Stage Resolution Cell Selection
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Solution Overview
Problem
Current radar systems face high computing complexity due to the computational intensity of processing multiple resolution cells and combinations of antennas, exceeding the capacity of conventional processor circuits for real-time target detection, especially in high-resolution radar systems required for automated driving.
Innovation Solution
A two-stage signal evaluation method is employed, where a first processing step uses a subset of signal data to identify potentially occupied resolution cells based on an occupancy criterion, followed by a second step with finer resolution for targeted calculations, reducing unnecessary computations and data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional radar signal processing methods are used to process all resolution cells with full antenna combinations, then complete target detection coverage is achieved, but computing complexity exceeds processor capacity for real-time processing
Solution Approach 1:
The patent divides the resolution cells into occupied and unoccupied categories based on a coarse evaluation. Only occupied resolution cells undergo fine evaluation with full computational processing. This segmentation reduces the number of resolution cells requiring intensive computation while maintaining complete target detection coverage.
Solution Approach 2:
The patent applies partial action by performing full computational processing only on occupied resolution cells rather than all resolution cells. Unoccupied resolution cells receive minimal processing, reducing overall computing complexity while maintaining detection reliability for actual targets.
2Measurement precision
If high-resolution signal processing is applied to all data, then detection precision is improved, but energy consumption and processing time increase excessively
Solution Approach 1:
The patent segments the signal processing into two stages: coarse evaluation for all resolution cells and fine evaluation only for occupied resolution cells. This segmentation enables high detection precision for occupied cells while reducing energy consumption by avoiding unnecessary fine processing of unoccupied cells.
Solution Approach 2:
The patent applies partial action by performing energy-intensive fine signal processing only on occupied resolution cells rather than all resolution cells. This reduces overall energy consumption while maintaining high detection precision for actual targets through selective application of high-resolution processing.
3Reliability
If all antenna signal combinations are processed, then detection reliability is improved, but the quantity of data to be processed increases beyond real-time handling capacity
Solution Approach 1:
The patent segments the data processing workflow into coarse evaluation of all resolution cells followed by fine evaluation only of occupied resolution cells. This segmentation reduces the volume of data requiring intensive processing while maintaining detection reliability through comprehensive initial screening.
Solution Approach 2:
The patent applies partial action by performing full antenna signal combination processing only on occupied resolution cells rather than all resolution cells. This reduces the quantity of data requiring intensive processing while maintaining detection reliability through the preliminary coarse evaluation stage.
Data Source
AI summary
System and method for operating a radar system that includes a plurality of antennas, wherein a respective antenna signal is received from each of the antennas and is converted into a digital antenna signal via an analog-to-digital conversion. Digital signal data of the antennas are provided in a data memory. Signal evaluation is performed in a two-stage design, where a predetermined subset of the signal data is supplied to an evaluation module for a target detection, and resolution cells for which, the associated resolution gate meets a predetermined occupancy criterion are selected, and only the signal data available in the data memory for the selected resolution cells are selected for these resolution cells for further processing.