Radar Angular Position Evaluation Using Speed-Based Search Regions
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Solution Overview
Problem
Current radar systems face significant computing expenses and energy consumption when determining angular positions of objects, especially in large angular regions and high object resolution, making the detection of weaker targets inefficient.
Innovation Solution
A method and device that first assess the intrinsic speed of the radar device and relative speed of objects to identify potential stationary targets, reducing the search space to a narrower angular region, and using an angular quality measure to determine if the object is within a pre-defined test region, thereby reducing computational effort and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional radar methods are used to determine angular positions with high object resolution in large angular regions, then detection accuracy is improved, but computing expense and energy consumption increase significantly
Solution Approach 1:
The patent divides the angular search space into multiple angular test regions based on the relative speed of the recognized object. Instead of performing exhaustive angular estimation across the entire angular range, the method segments the search space and only performs detailed angular estimation within the relevant test region(s), thereby reducing computing expense and energy consumption while maintaining detection accuracy for objects in the regions of interest.
2Reliability
If exhaustive angular estimation is performed across all angular regions, then complete object detection is achieved, but processing time increases
Solution Approach 1:
The patent performs preliminary classification of objects as stationary or moving based on their relative speed before performing angular estimation. By determining the object category in advance and calculating angular test regions based on relative speed, the method prepares the search space beforehand, allowing angular estimation to be performed only where necessary. This preliminary action reduces processing time while maintaining detection completeness.
3Productivity
If the search space is reduced to narrow angular regions, then computing expense is reduced, but detection of objects outside expected regions may be missed
Solution Approach 1:
The patent dynamically adjusts the angular test regions based on the relative speed of the recognized object. The angular test regions are not fixed but are calculated adaptively according to the object's motion characteristics. This dynamic approach ensures that the search regions accurately reflect the expected angular positions of objects with different relative speeds, maintaining detection coverage while optimizing computational efficiency.
Data Source
AI summary
A method for evaluating an angular position of an object recognized on the basis of radar data, the radar data being ascertained by a radar device. The method includes: ascertaining of an intrinsic speed of the radar device; ascertaining a relative speed of the recognized object in relation to the radar device, using the ascertained radar data; ascertaining at least one angular test region using the ascertained intrinsic speed and the ascertained relative speed, the at least one angular test region corresponding to possible stationary objects that have a relative speed that substantially corresponds to the ascertained relative speed; and ascertaining whether an azimuth angle of the recognized object lies in the ascertained angular test region.