Automotive Radar Sensor Synchronization for Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Radar sensors in vehicles often interfere with each other due to uncoordinated electromagnetic wave superposition, reducing signal quality and interfering with the increasing number of sensors per vehicle.
Innovation Solution
Implement a method for synchronized operation of radar sensors using a controller to adjust modulation parameters, such as center frequency, ramp gradient, and transmission timing, and utilize triangular modulation to reduce interference and enable communication between sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple radar sensors operate independently without coordination, then each sensor can function autonomously, but signal interference increases due to electromagnetic wave superposition
Solution Approach 1:
The patent implements periodic transmission of frequency ramps by radar sensors, where each sensor transmits frequency-modulated signals in periodic cycles. This structured periodic operation allows for predictable signal patterns that can be coordinated across multiple sensors, reducing random interference while maintaining autonomous operation capabilities
Solution Approach 2:
The patent changes operational parameters of radar sensors including center frequency, ramp gradient, and transmission timing. By dynamically adjusting these parameters across different sensors and time periods, the system reduces signal superposition interference while preserving the ability of each sensor to operate independently when needed
2Object-affected harmful factors
If radar sensors are synchronized to reduce interference, then signal quality improves, but the complexity of coordination increases
Solution Approach 1:
The patent employs parameter changes including center frequency offsets, ramp gradient variations, and transmission timing adjustments across synchronized sensors. These parameter modifications enable interference reduction through coordinated operation while maintaining relatively simple implementation architecture
Solution Approach 2:
The synchronized periodic transmission of frequency ramps with structured timing patterns enables coordinated operation across multiple sensors. This periodic structure simplifies the coordination complexity by providing predictable, repeating patterns that are easier to manage than arbitrary timing arrangements
3Adaptability or versatility
If the number of radar sensors per vehicle increases, then more driver assistance functions can be implemented, but interference between sensors increases
Solution Approach 1:
The patent applies parameter changes across multiple radar sensors including variations in center frequency, ramp gradient, and transmission timing. This enables a higher number of sensors to operate simultaneously with reduced interference, supporting increased driver assistance functions
Solution Approach 2:
The structured periodic transmission patterns enable multiple radar sensors to operate in a coordinated manner, reducing interference effects and allowing for increased sensor density to support more driver assistance functions
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
Enhances signal quality by reducing interference, allows for synchronization and communication among radar sensors, and increases speed evaluation range without affecting subsequent signal processing.
Implementation Method 1
A radar sensor emits a modulated electromagnetic wave and determines the distances and relative speeds of various reflection points in the surrounding environment of the moving vehicle from the received reflection
Implementation Method 2
determines the distances and relative speeds of various reflection points in the surrounding environment of the moving vehicle from the received reflection, which is delayed and Doppler frequency-shifted
Implementation Method 3
the transmission signal is a periodically repeated and linearly frequency-modulated signal, and wherein a center frequency and/or ramp gradient and/or pulse repetition rate of the transmission signal can be adjusted
Data Source
AI summary
A radar sensor device. The radar sensor device includes at least one radar sensor and a controller which is connected to the at least one radar sensor and is designed to control the process of generating a transmission signal and the process of sampling a received signal of the radar sensor. The transmission signal is a periodically repeated and linearly frequency-modulated signal. The center frequency and/or ramp gradient and/or pulse repetition rate of the transmission signal and/or the number of frequency ramps per measurement cycle and/or pauses between measurement cycles can be adjusted. The controller is designed to detect pulse interference occurring in the sampled received signal and to calculate the frequencies of the transmission causing the interference.