Radar Staggered Linear Array for 3D Point Cloud Generation
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Solution Overview
Problem
Current radar systems require multiple units and complex processing to obtain 3D representations of environments, increasing costs and complexity, whereas existing 2D measurements lack elevation information essential for accurate vehicle navigation and obstacle avoidance.
Innovation Solution
A radar system with a staggered linear array of antennas that captures both azimuth and elevation angles from phase information of radar reflection signals, allowing for the determination of 3D point clouds without the need for multiple radar units, thereby reducing system complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple radar units are used to obtain 3D representations, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies dimensionality change by using a two-dimensional array of antennas to extract three-dimensional spatial information (azimuth, elevation, and range). The 2D array configuration enables the system to resolve both azimuth and elevation angles simultaneously, transforming a 2D measurement system into a 3D sensing capability without requiring multiple separate radar units.
2Measurement precision
If multiple radar units are used to obtain 3D representations, then measurement precision is improved, but cost increases
Solution Approach 1:
The patent implements multi-functionality by designing a single radar unit with a 2D antenna array that performs multiple functions: it simultaneously measures range, azimuth angle, and elevation angle. This universal design eliminates the need for multiple specialized radar units, reducing both quantity and cost while maintaining 3D measurement precision.
3Measurement precision
If complex processing is used to obtain 3D representations, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical or computational processing systems with a mathematical approach based on phase information analysis. By utilizing the phase differences of signals received at different antenna elements in the 2D array, the system calculates elevation angles through mathematical processing rather than complex hardware or iterative algorithms, simplifying the overall device complexity.
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
Enables cost-effective 3D environmental mapping with enhanced elevation data, improving vehicle navigation and obstacle avoidance capabilities by integrating elevation information into 2D radar measurements.
Implementation Method 1
Distances to radio-reflective features can be determined according to the time delay between transmission and reception
Implementation Method 2
Some radar systems may also estimate relative motion of reflective objects based on Doppler frequency shifts in the received reflected signals
Implementation Method 3
based on phase information of the plurality of radar reflection signals, determining an elevation angle for the one or more surfaces causing the plurality of radar reflection signals
Data Source
AI summary
Example embodiments described herein involve determining three dimensional data representative of an environment for an autonomous vehicle using radar. An example embodiment involves receiving radar reflection signals at a radar unit coupled to a vehicle and determining an azimuth angle and a distance for surfaces in the environment causing the radar reflection signals. The embodiment further involves determining an elevation angle for the surfaces causing the radar reflection signals based on phase information of the radar reflection signals and controlling the vehicle based at least in part on the azimuth angle, the distance, and the elevation angle for the surfaces causing the plurality of radar reflection signals. In some instances, the radar unit is configured to receive radar reflection signals using a staggered linear array with one or multiple radiating elements offset in the array.