Multi-Static Automotive Radar Layout for Sub-0.2° Angular Resolution
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Solution Overview
Problem
Existing CA/AD vehicles face challenges in achieving high angular resolution radar imaging without the need for large and expensive antennas, as LiDAR systems are costly and weather-sensitive, while SAR performance depends on vehicle movement.
Innovation Solution
A multi-static radar system with complementarily placed and synchronized radar sensors integrated into a compact package, achieving angular resolutions below 0.2° by leveraging multiple transmitters and receivers within a vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If LiDAR is used to achieve high angular resolution radar imaging, then angular resolution is improved, but cost increases and weather sensitivity worsens
Solution Approach 1:
The patent replaces LiDAR (optical system) with radar (electromagnetic system operating at radio frequencies). This substitution eliminates weather sensitivity because radar waves can penetrate fog, rain, and snow, while maintaining high angular resolution through multi-static configuration and signal processing techniques.
2Measurement precision
If SAR is used to achieve high angular resolution radar imaging, then angular resolution is improved, but dependency on vehicle movement increases
Solution Approach 1:
The patent segments the radar system into multiple static sensors positioned at different locations within the vehicle. Each sensor independently transmits and receives signals, eliminating the need for vehicle movement to achieve angular resolution. The multi-static configuration allows the system to maintain functionality whether the vehicle is stationary or moving.
3Measurement precision
If multi-static radar system with multiple sensors is implemented, then angular resolution is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple radar sensors into a single integrated package that functions as a unified multi-static radar system. The sensors are positioned at different locations within the package and synchronized to operate coherently, achieving high angular resolution while presenting a compact, manageable system rather than multiple separate units.
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 system provides high angular resolution radar imaging efficiently, overcoming the limitations of LiDAR and SAR, and maintaining functionality regardless of vehicle movement or weather conditions.
Implementation Method 1
a first plurality of transmitters (TX) and a plurality of receivers (RX), co-located within a package for disposition at a location in a vehicle, wherein the first plurality of TX are arranged to transmit first electro-magnetic (EM) signals into a surrounding of the vehicle, and the plurality of RX are arranged to receive reflections of the first EM signals
Data Source
AI summary
Apparatuses, methods, and storage media associated with automotive radar sensing, are disclosed herein. In some embodiments, a multi-static radar system formed with at least a first and a second radar sensor is provided to a vehicle. At least one of the first and second radar sensors include a plurality of transmitters and a plurality of receivers. The first and second radar sensors are placed at first and second locations of the vehicle, at a distance from each other, to provide the system with an angular resolution that is smaller than either of the native angular resolutions of the first and second radar sensors. Other embodiments are also described and claimed.