Vehicle Radar Code Sequence Interference Avoidance
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Solution Overview
Problem
Advanced driver-assistance systems (ADAS) using radar face interference from other vehicles using the same code sequence, leading to erroneous object detection and potential driving hazards.
Innovation Solution
A method and apparatus for detecting objects using radar, where a transmission signal generated based on a code sequence is propagated, and the code sequence is changed when an interference signal is detected, ensuring unique sequences are used by each vehicle to avoid interference, utilizing a processor to determine the object's presence and intensity of the echo signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the same code sequence is used by multiple vehicles for radar transmission, then the radar system can operate with standardized sequences, but interference signals are generated leading to erroneous object detection
Solution Approach 1:
The code sequence is changed from a static, fixed pattern to a dynamic, time-varying sequence. The radar system dynamically adjusts the code sequence based on detected interference levels, transitioning between different sequences to avoid collisions with other vehicles' radar signals. This dynamic adaptation eliminates interference while maintaining standardized operation protocols.
Solution Approach 2:
The system changes the code sequence parameter in response to detected interference. When interference is detected above a threshold, the system switches to a different code sequence from a predefined set, thereby changing the temporal and spectral characteristics of the radar signal to avoid further interference and ensure accurate object detection.
2Reliability
If the code sequence is changed frequently to avoid interference, then interference signals are minimized, but the complexity of the radar system increases
Solution Approach 1:
Multiple code sequences are pre-defined and stored in the radar system before operation begins. When interference is detected, the system simply switches to a pre-prepared alternative sequence rather than generating a new one in real-time. This preliminary preparation reduces the computational complexity and response time required for interference avoidance.
Solution Approach 2:
The radar system continuously monitors the received signals for interference patterns and uses this feedback to determine when to switch code sequences. The interference detection mechanism provides real-time feedback about the operational environment, enabling the system to adaptively change sequences only when necessary, thereby balancing reliability with system complexity.
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 approach effectively differentiates between actual and interference signals, reducing erroneous object detection and enhancing the accuracy of ADAS systems by changing the code sequence when interference is detected, thereby improving safety and reliability.
Implementation Method 1
receiving an echo signal
Implementation Method 2
detecting an object using a radar
Implementation Method 3
detecting an object based on a correlation between the code sequence and the echo signal
Data Source
AI summary
Disclosed is a method and apparatus for detecting an object using a radar in a vehicle, wherein object detection is performed by generating a transmission signal using a code sequence, receiving an echo signal reflected from an object, and detecting the object based on the echo signal and the code sequence.