Variable Spacing Radar Nodes for Angular Ambiguity Resolution
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Solution Overview
Problem
Wide spacing between radar antennas in autonomous vehicle systems leads to ambiguity in measuring the angular location of objects, affecting the vehicle's ability to accurately avoid obstacles.
Innovation Solution
A radar array with variable aperture length and spacing between nodes, along with a processor that generates test pulses and determines the angular location of objects, allowing for precise vehicle trajectory adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the spacing between radar antenna elements is increased to achieve high angular resolution, then the angular resolution is improved, but ambiguity in angle measurement increases
Solution Approach 1:
The radar array is divided into multiple radar nodes, each node containing multiple antenna elements. This segmentation allows the system to process signals from different spatial groups, enabling ambiguity resolution through node-based signal processing while maintaining the wide spacing needed for high angular resolution
Solution Approach 2:
A processor acts as an intermediary that receives signals from multiple radar nodes and performs complex signal processing to resolve angle measurement ambiguity. The processor combines information from spatially separated nodes to disambiguate angular measurements while preserving the high angular resolution provided by wide element spacing
2Measurement precision
If the number of radar nodes is increased to improve angular resolution, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The radar array is organized into multiple radar nodes with each node containing multiple antenna elements. This segmentation provides a modular structure that improves angular resolution through increased node count while managing complexity through standardized node configurations and systematic signal processing approaches
Solution Approach 2:
The system employs dynamic signal processing that adapts to the specific configuration of radar nodes. The processor dynamically adjusts processing parameters and algorithms based on the number and arrangement of nodes, enabling the system to achieve high angular resolution while managing complexity through adaptive rather than static processing
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
The solution reduces ambiguity in angular measurements, enabling high-resolution object detection and accurate vehicle navigation, thereby enhancing the vehicle's ability to avoid obstacles effectively.
Implementation Method 1
a radar system that transmits an electromagnetic signal into a region surrounding the vehicle and receives a reflection of the electromagnetic signal from the object or obstacle
Implementation Method 2
receives a reflection of the test pulse from an object
Data Source
AI summary
A vehicle, a radar system for the vehicle, and method of driving the vehicle. A radar array having plurality of radar nodes is arranged along the vehicle. Each radar node includes a first transmitter at one end of the node, a second transmitter at a second end of the node and a plurality of receivers aligned between the first transmitter and the second transmitter. At least one of an aperture length of the nodes and a spacing between the nodes is a variable parameter. A processor activates a transmitter of the radar array to generate a test pulse, receive, at a receiver of the radar array, a reflection of the test pulse from an object, and determines an angular location of the object from the reflection of the test pulse. A trajectory of the vehicle can be changed using the determined angular location of the object.