Echo Signal Processing Using Inflection Point Timing
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Solution Overview
Problem
Current light detection and ranging technologies face challenges in improving the signal-to-noise ratio of echo signals when combining signals from different pixels, as noise is introduced when the signals are not from the same target object, leading to reduced signal quality.
Innovation Solution
The method involves combining a first echo signal and a second echo signal when the time difference between their inflection points is less than a preset threshold, indicating they are from the same target object, thereby improving the signal-to-noise ratio by determining and combining corresponding data segments from these signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If echo signals from different pixels are combined to improve signal-to-noise ratio, then the signal-to-noise ratio can be improved, but noise is introduced when signals are not from the same target object
Solution Approach 1:
The patent changes the parameter used for signal combination from simple pixel-based grouping to time-based grouping using inflection point timing. By comparing the time difference between inflection points of echo signals from different pixels, the system identifies signals from the same target object and combines only those, avoiding noise from unrelated signals while maintaining improved signal-to-noise ratio.
2Productivity
If echo signals are combined without verification, then processing speed is maintained, but incorrect signals are combined leading to reduced accuracy
Solution Approach 1:
The patent performs preliminary verification by comparing inflection point timing before combining echo signals. This preliminary action of checking time difference ensures that only signals from the same target object are combined, maintaining both processing efficiency and detection accuracy by filtering out incorrect combinations in advance.
Data Source
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AI summary
Embodiments of this application disclose an echo signal processing method. The method in the embodiments of this application includes: receiving at least two echo signals, where the at least two echo signals include a first echo signal and a second echo signal, and the first echo signal and the second echo signal are received in different directions; determining a first inflection point from the first echo signal, and determining a second inflection point from the second echo signal, where the first inflection point is a sampling point of the first echo signal, and amplitude values of left and right neighboring sampling points are less than an amplitude value of the first inflection point; and the second inflection point is a sampling point of the second echo signal, and amplitude values of left and right neighboring sampling point are less than an amplitude value of the second inflection point; determining whether a time difference between a first moment at which the first inflection point is received from the first echo signal and a second moment at which the second inflection point is received from the second echo signal is less than a first preset threshold; and if yes, combining the first echo signal and the second echo signal.