LiDAR Echo Integration Across Emission Angles for Low-SNR Ranging
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Solution Overview
Problem
Conventional LiDAR echo signal processing methods fail to effectively improve the signal-to-noise ratio for objects with low reflectivity or at long distances, limiting the ranging capability.
Innovation Solution
A LiDAR echo signal processing method that buffers and integrates echo signals based on multidimensional signal emission angles, using non-coherent integration to enhance signal correlation and improve signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If one-dimensional non-coherent integration is used to process echo signals, then the signal processing is simple, but the signal-to-noise ratio cannot be effectively improved for objects with low reflectivity or at long distances
Solution Approach 1:
The patent transitions from one-dimensional non-coherent integration to two-dimensional non-coherent integration by incorporating both azimuth and elevation angles. The echo signals are integrated across multiple azimuth angles and multiple elevation angles, creating a two-dimensional integration space that significantly improves signal-to-noise ratio for low-reflectivity or distant objects while maintaining manageable system complexity through structured processing.
2Reliability
If conventional one-dimensional non-coherent integration is applied, then the processing speed is fast, but the ranging capability is limited
Solution Approach 1:
The patent segments the echo signal processing into distinct azimuth and elevation components. The two-dimensional non-coherent integration is performed by separately integrating signals across azimuth angles and elevation angles, then combining the results. This segmentation allows the system to achieve improved ranging capability through comprehensive spatial integration while maintaining processing efficiency through modular, structured computation.
Data Source
AI summary
A LiDAR echo signal processing method is disclosed. The method includes: receiving an echo signal reflected by a to-be-detected object, where the echo signal includes multidimensional signal emission angles; buffering the echo signal based on the multidimensional signal emission angles to obtain buffered signals; when the number of buffered signals reaches a preset buffering number, extracting a target signal corresponding to a preset neighborhood window from the buffered signals; and performing non-coherent integration on the target signal and outputting the integrated target signal.