Radar Interference Prevention Apparatus with Periodic Mode Switching
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Solution Overview
Problem
Conventional radar systems face difficulties in accurately determining when to end the interference removal process, leading to potential deterioration in detection accuracy due to the interference removal process acting as a low-pass filter and failing to distinguish between interference reduction and the end of the interference state.
Innovation Solution
A radar system with an interference prevention apparatus that includes an acquisition section, a prevention section for generating a prevention signal through interference removal, an analysis section for frequency analysis, and a switching section that switches between normal and interference modes based on interference presence, allowing periodic interruption of the interference removal process and resuming it when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the interference removal process is continuously performed, then the influence of radio wave interference is reduced, but the detection accuracy deteriorates due to the low-pass filter effect
Solution Approach 1:
The interference removal process is executed periodically rather than continuously. The switching section alternates between a first state (performing interference removal) and a second state (not performing interference removal), allowing the system to benefit from interference reduction while avoiding the continuous low-pass filter effect that degrades detection accuracy.
Solution Approach 2:
The system dynamically switches between two operational states based on timing signals. The switching section changes the operational state of the interference removal process according to a predetermined timing, enabling adaptive control that balances interference suppression with detection accuracy maintenance.
2Reliability
If the interference removal process is performed for a long duration, then interference prevention is improved, but the processing time increases
Solution Approach 1:
The interference removal process is executed in periodic intervals rather than continuously. By alternating between performing and not performing the interference removal process, the system achieves effective interference prevention over time while reducing the total processing time compared to continuous execution.
Data Source
AI summary
A prevention section generates a prevention signal by performing an interference removal process of preventing an influence of radio wave interference with respect to a non-prevention signal acquired by an acquisition section from a radar sensor for each processing cycle. An analysis section performs a frequency analysis process by using the prevention signal when an operation mode is an interference mode and by using the non-prevention signal when the operation mode is a normal mode. A determination section determines, based on an analysis result obtained by the analysis section, whether radio wave interference is present. When the operation mode is the normal mode and the interference is determined to be present, a switching section switches the operation mode to the interference mode, maintains the interference mode during a certain number of processing cycles, and then switches the operation mode to the normal mode.