Vehicle Radar Spectrum Occupancy Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle radar systems experience interference when multiple systems operate in close proximity, leading to decreased performance in measuring environmental features, particularly in densely populated areas like cities, due to overlapping spectral regions between 76 GHz and 81 GHz.
Innovation Solution
A vehicle radar system detects and measures electromagnetic energy from external emitters, determines a spectrum occupancy representation, and adjusts its operations to avoid interference by switching to a passive receive-only mode, identifying unoccupied spectral regions, and modifying transmission parameters to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple vehicle radar systems operate in close proximity using the same spectral region, then the radar systems can provide comprehensive environmental coverage, but interference occurs leading to decreased measurement accuracy
Solution Approach 1:
The patent dynamically changes the operating frequency parameter of the radar system by selecting different spectral regions within the 76-81 GHz band. The system monitors spectrum occupancy and transitions between frequency channels to avoid occupied regions, thereby eliminating interference while maintaining measurement functionality
Solution Approach 2:
The system implements dynamic frequency selection where the radar operating frequency is not fixed but adapts in real-time based on detected spectrum occupancy. The radar system continuously monitors the electromagnetic environment and adjusts its transmission frequency dynamically to avoid interference from external emitters
2Measurement precision
If the radar system continuously monitors spectrum occupancy to avoid interference, then measurement accuracy improves, but system complexity and computational load increase
Solution Approach 1:
The radar system performs multiple functions using the same hardware components: it simultaneously conducts environmental sensing, spectrum occupancy detection, and frequency selection. The signal processing unit handles both radar measurements and interference detection, eliminating the need for separate dedicated monitoring hardware
Solution Approach 2:
The radar system autonomously monitors its own operating environment and self-adjusts its frequency without external intervention. The system independently detects spectrum occupancy, identifies interferers, and reconfigures its transmission parameters, reducing the need for complex external control systems
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
This technique enhances the performance of vehicle radar systems by reducing interference, allowing for more accurate environmental mapping and navigation by identifying and avoiding occupied spectral regions, thereby improving the accuracy of distance and motion measurements.
Implementation Method 1
receiving, at a computing system coupled to a vehicle, information relating to electromagnetic energy radiating in an environment of the vehicle and detected using a vehicle radar system
Implementation Method 2
determining a spectrum occupancy representation that indicates one or more spectral regions occupied by the electromagnetic energy
Implementation Method 3
adjusting, by the computing system, operation of the vehicle radar system based on the spectrum occupancy representation
Data Source
AI summary
Example embodiments relate to methods and systems for implementing radar electronic support measure operations. A vehicle's processing unit may receive information relating to electromagnetic energy radiating in an environment of the vehicle that is detected using a vehicle radar system. The electromagnetic energy originated from one or more external emitters, such as radar signals transmitted by other vehicles. The processing unit may determine a spectrum occupancy representation that indicates spectral regions occupied by the electromagnetic energy and subsequently adjust operation of the vehicle radar system based on the spectrum occupancy representation to reduce or mitigate interference with the external emitters in the vehicle's environment. In some examples, the vehicle radar system may be switched to a passive receive-only mode to measure the electromagnetic energy radiating in the environment from other emitters.