Multi-Static Radar Detection Using Base Stations for Vehicle Blind Spots
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Solution Overview
Problem
Monostatic radar systems on vehicles have limited range and field-of-view, making it difficult to detect objects in certain driving situations, such as merging onto a highway.
Innovation Solution
A multi-static radar detection system using receivers at base stations surrounding the vehicle to collect multi-carrier modulation signals, performing non-uniform interpolation and time-frequency analysis to determine Doppler shift and time delay, transforming these values into velocity and range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If monostatic radar is mounted on the vehicle, then the radar system can detect objects in the surrounding environment, but the detection range and field-of-view are limited
Solution Approach 1:
The radar detection system is segmented into multiple independent monostatic or bistatic radar components distributed at different spatial locations around the vehicle. Each radar component covers a specific sector, and their combined coverage creates a comprehensive detection network that overcomes the limited field-of-view of a single monostatic radar while maintaining reliable object detection capability in all directions including blind spots.
2Reliability
If monostatic radar is mounted on the vehicle, then the radar system can detect objects, but the detection range is limited
Solution Approach 1:
Infrastructure-based transmitters (such as base stations or roadside units) serve as intermediaries in the radar detection system. These fixed transmitters emit radar signals that reflect off objects and are received by the mobile receiver on the vehicle. This intermediary approach extends the detection range beyond what a vehicle-mounted transmitter could achieve alone, as the infrastructure transmitters are positioned at optimal locations with unobstructed line-of-sight to distant objects.
3Area of stationary object
If multiple radar components are deployed in multi-static configuration, then the field-of-view and detection range are improved, but the system complexity increases
Solution Approach 1:
The radar components in the multi-static system are designed with multi-functionality to reduce overall system complexity. Each radar component can operate in multiple modes (monostatic or bistatic configuration), serve multiple purposes (detection, ranging, velocity measurement), and be deployed in various locations. This universal design allows the same hardware platform to fulfill different detection requirements, simplifying the system architecture despite the distributed multi-component configuration.
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 object detection capabilities by overcoming the limitations of monostatic radar systems, enabling detection of objects that would otherwise be missed, utilizing existing wireless infrastructure without modifying data standards.
Implementation Method 1
The one or more controllers determine a Doppler shift and a time delay of a respective object located within the environment surrounding the vehicle based on the interpolated time-frequency grid. Finally, the one or more controllers transform a value for the Doppler shift into a velocity value
Implementation Method 2
The one or more controllers determine a Doppler shift and a time delay of a respective object located within the environment surrounding the vehicle based on the interpolated time-frequency grid. Finally, the one or more controllers transform a value for the time delay into a range value
Data Source
AI summary
A multi-static radar detection system for a vehicle includes one or more receivers for collecting multi-carrier modulation signals emitted by one or more transmitters that are positioned at base stations located in an environment surrounding the vehicle. The multi-carrier modulation signals include one or more types of reference signals. The multi-static radar detection system also includes one or more controllers in electronic communication with the one or more receivers. The one or more controllers execute instructions to collect, by the one or more receivers, a multi-carrier modulation signal emitted by the one or more transmitters. The one or more controllers determine a Doppler shift and a time delay of a respective object located within the environment surrounding the vehicle based on an interpolated time-frequency grid; and transform a value for the Doppler shift into a velocity value and a value for the time delay into a range value.