Radar Frequency Slope Control for Ghosting Interference Removal
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Solution Overview
Problem
Radar devices in autonomous vehicles experience interference issues leading to ghosting phenomena due to signal interference, making accurate detection of targets challenging.
Innovation Solution
A radar control device and method that includes a transceiver, a transmission signal controller to change the frequency slope at preset intervals, and a reception signal processor to calculate frequency deviations, enabling the extraction of interference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple radar devices transmit signals simultaneously, then the coverage and detection capability are improved, but signal interference and ghosting phenomena occur
Solution Approach 1:
The patent implements periodic frequency slope changes in the transmission signal at preset intervals. The transmission signal controller changes the frequency slope of the transmitted signal periodically, creating time-varying signal characteristics that allow the receiving radar to distinguish between genuine targets and interference signals through frequency deviation analysis.
Solution Approach 2:
The patent changes the frequency parameter of the transmission signal dynamically. By modifying the frequency slope of the transmitted signal at different time intervals, the system creates detectable frequency deviations that enable the reception signal processor to identify and remove interference signals based on mismatched frequency characteristics.
2Reliability
If frequency slope is changed continuously, then interference signal removal is improved, but signal processing complexity increases
Solution Approach 1:
The frequency slope is changed at preset intervals rather than continuously, creating a periodic pattern that simplifies the processing logic. The reception signal processor can use this known periodic pattern to systematically analyze frequency deviations and identify interference signals without requiring complex continuous analysis.
Solution Approach 2:
The system uses frequency deviation calculation as a feedback mechanism to identify interference signals. The reception signal processor calculates the frequency deviation between the received signal and the expected transmission signal, and when a significant deviation is detected, it identifies and removes the interfering signal, creating a closed-loop interference rejection system.
Data Source
AI summary
The present embodiments relate to a technology for a radar control device and method for transmitting a transmission signal, receiving a reception signal, controlling to change a frequency of the transmission signal at a preset interval, calculating a frequency deviation between the transmission signal and the reception signal, and extracting the interference signal based on the frequency deviation to extract and remove an interference signal causing ghosting in a radar device.