Multi-Radar Image Registration for Higher-Resolution Vehicle SAR
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Solution Overview
Problem
Conventional vehicle-mounted synthetic aperture radar systems generate radar images with low resolution, affecting positioning accuracy and driving safety.
Innovation Solution
Obtain at least two groups of original radar data from different radars, perform image registration, and apply time-domain coherent superposition to synthesize a target image, adjusting radar configuration information for optimal coverage and phase alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single radar is used for imaging, then the device complexity is reduced, but the image resolution deteriorates
Solution Approach 1:
The patent combines data from multiple radars (at least two groups of original radar data from different radars) and performs time-domain coherent superposition to synthesize a high-resolution target image. This merging approach achieves high resolution without requiring a single complex radar system, thereby resolving the contradiction between device complexity and image resolution.
Solution Approach 2:
The patent divides the imaging task into multiple segments by using multiple radars with different configuration information (location, transmission angle, bandwidth). Each radar captures a portion of the target scene, and the results are integrated through image registration and coherent superposition to form a complete high-resolution image.
2Loss of information
If multiple radars with different configuration information are used, then the image information coverage is improved, but the device complexity increases
Solution Approach 1:
The patent makes the radar system multi-functional by enabling different radars with various configuration information (location, transmission angle, bandwidth) to work together. Each radar can be configured for specific detection scenarios, and the system universally handles data integration through standardized image registration and coherent superposition processes, achieving comprehensive information coverage without proportionally increasing complexity.
3Manufacturing precision
If image registration and time-domain coherent superposition are performed, then the image resolution is improved, but the processing time increases
Solution Approach 1:
The patent performs image registration and time-domain coherent superposition as preliminary processing steps before final image synthesis. By pre-aligning the radar data from multiple sources and establishing phase consistency in advance, the system reduces the computational burden during final image generation, thereby improving resolution while minimizing additional processing time.
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
Improves radar image resolution, enriches image information, and enhances positioning accuracy and driving safety by aligning phases and adjusting radar beams for optimal coverage.
Implementation Method 1
obtaining at least two groups of original radar data, where the at least two groups of original radar data are from at least two radars
Implementation Method 2
synthesizing a first target image based on the at least two groups of original radar data, where the first target image is obtained by performing image registration and time-domain coherent superposition on the at least two groups of original radar data
Data Source
AI summary
An imaging method and apparatus, a radar system, an electronic device, and a storage medium are provided. A first target image is obtained by obtaining at least two groups of original radar data from different radars, and performing image registration and time-domain coherent superposition. Each group of original radar data corresponds to one radar. The original radar data from the different radars includes different radar information. After image registration and time-domain coherent superposition are performed on the original radar data, the obtained first target image has higher physical resolution. Therefore, resolution of a generated radar image is improved, image information in the radar image is enriched, and positioning accuracy and driving safety of a vehicle are improved.