Radar Signal Processing Device Micro-Doppler Segmentation
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Solution Overview
Problem
Radar signal processing devices often erroneously treat micro-Doppler points as independent targets, leading to excessive division of detected objects, such as vehicle bodies and wheels, and can mistakenly combine moving vehicles with stationary objects like rubber poles.
Innovation Solution
A radar signal processing device that includes an acquirer, pre-segment generator, and segment generator, which acquires ranging point information, groups points into pre-segments based on positional and speed relationships, and combines pre-segments to form composite segments, reducing erroneous target recognition by considering vertical and surrounding relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ranging points are grouped based solely on speed information, then micro-Doppler points can be detected, but different targets may be erroneously recognized as the same target
Solution Approach 1:
The patent divides the grouping process into two stages: first grouping ranging points into pre-segments based on speed information to detect micro-Doppler points, then further grouping pre-segments into composite segments using positional relationships. This segmentation approach allows micro-Doppler detection while preventing erroneous target merging through the additional positional verification step.
2Device complexity
If ranging points are grouped into single segments, then processing is simplified, but targets are excessively divided into multiple segments
Solution Approach 1:
The patent introduces an intermediate segmentation level (pre-segments) between raw ranging points and final target segments. By first creating pre-segments based on speed and then combining them into composite segments using positional relationships, the system achieves complete target detection without excessive division, while maintaining manageable processing complexity through the structured two-stage approach.
3Measurement precision
If positional and speed thresholds are both applied, then target recognition accuracy improves, but processing time increases
Solution Approach 1:
The patent performs preliminary grouping of ranging points into pre-segments based on speed information before applying the more computationally intensive positional relationship analysis. This preliminary action filters and organizes data in advance, reducing the overall processing time when both positional and speed thresholds are ultimately applied, as the data is already partially structured from the first grouping stage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively reduces erroneous recognition of different targets as the same and excessive division of targets, accurately distinguishing between moving vehicle components and stationary objects by integrating pre-segments based on positional and speed thresholds.
Implementation Method 1
obtained by irradiating radar waves
Data Source
AI summary
A radar signal processing device includes an acquirer, pre-segment generator, and a segment generator. The acquirer acqu.ires ranging point information including position information and speed information at each of ranging points obtained by irradiating radar waves. The pre-segment generator generates a pre-segment by grouping the ranging points as a set of the ranging points based on the acquired ranging point information from the acquirer. The segment generator generates a composite segment by combining the ranging points from a first pre-segment with the ranging points from a second pre-segment as a set of the ranging points based on a positional relationship between the first pre-segment and the second pre-segment. The first pre-segment is one of pre-segments generated by the pre-segment generator. The second pre-segment is another one of the pre-segments generated by the pre-segment generator.