Radar Receiver Gain Testing Under Interference Detection
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Solution Overview
Problem
Automotive radar systems face interference from other radar systems, which degrades detection performance and compromises integrity testing processes.
Innovation Solution
The radar system performs RX-to-RX gain difference testing by injecting multiple test tones into receiver modules, analyzing output signals for interference, and modifying frequencies to avoid interfering signals, ensuring accurate integrity testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple test tones are injected into receiver modules for integrity testing, then measurement precision is improved, but object-affected harmful factors (interference) worsen
Solution Approach 1:
The system performs preliminary interference detection by analyzing output signals from receiver modules before finalizing the integrity testing process. This preliminary action identifies interfering signals early, allowing the system to adjust test tone frequencies or exclude affected receivers from testing, thereby maintaining measurement precision while accounting for interference conditions
Solution Approach 2:
The system dynamically changes test tone frequency parameters based on detected interference conditions. When interference is detected in the output signals, the system modifies the frequency parameters of subsequent test tones to avoid the interfering frequency ranges, thus maintaining measurement precision despite the presence of harmful interference factors
2Reliability
If test tones are injected into receiver modules, then reliability of testing is improved, but detection precision deteriorates due to interference from other radar systems
Solution Approach 1:
The system implements a feedback mechanism where output signals from receiver modules are continuously monitored during testing. When interference is detected through this feedback, the system responds by adjusting test parameters or excluding affected receivers, thereby maintaining both testing reliability and detection precision despite the presence of external radar interference
Solution Approach 2:
The system performs preliminary analysis of output signals to detect interference before it significantly degrades detection precision. This preliminary detection allows the system to adjust testing parameters in advance, ensuring that reliability is maintained while minimizing the impact of interference on detection precision
Data Source
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AI summary
The present disclosure relates to a radar system and related method, where the radar system includes test circuitry and a controller. The controller causes the test circuitry to inject a first pair of test tones having first test tone frequencies and first test tone magnitudes into first and second receiver modules, receive a first and second output signals from the first and second receiver modules, respectively, detect interference based on the first pair of test tones and the first and second output signals, modify, in response to detecting the interference, the first test tone frequencies to produce second test tone frequencies, cause, in response to detecting the interference, the test circuitry to inject a second pair of test tones having the second test tone frequencies into the first receiver module and the second receiver module.