Vehicular Radar Clutter Detection via Threshold Adjustment
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Solution Overview
Problem
Vehicular radars face performance deterioration in environments with severe clutter signals, such as steel tunnels, leading to missed target detection and potential accidents due to the overwhelming reflection of electromagnetic waves from structures like noise barriers.
Innovation Solution
A radar apparatus and method that includes a signal transmission unit, a signal reception unit, a determination unit for identifying clutter structures using frequency response information, and a target detection unit that adjusts detection threshold values to differentiate and detect target signals effectively amidst clutter signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vehicular radar transmits electromagnetic waves to detect target objects, then target detection capability is provided, but clutter signals from steel structures (tunnels, noise barriers) overwhelm target signals causing detection failure
Solution Approach 1:
The patent segments the detection process into distinct phases: clutter structure detection phase and target detection phase. By dividing the reception signal into multiple signal components and analyzing them separately, the system can identify clutter structures first, then adjust detection parameters accordingly to detect targets in cluttered environments.
Solution Approach 2:
The patent performs preliminary detection of clutter structures before conducting target detection. By analyzing frequency response information of the reception signal in advance, the system determines the presence of clutter structures and pre-adjusts detection threshold values, enabling effective target detection even in severely cluttered environments.
2Measurement precision
If radar uses fixed detection threshold to identify target signals, then detection process is simple, but target signals are missed in high clutter environments or false detections occur
Solution Approach 1:
The patent implements dynamic adjustment of detection threshold values based on the detected clutter structure presence. Instead of using a fixed threshold, the system adaptively changes detection parameters according to the environmental conditions, improving detection accuracy in varying clutter scenarios while maintaining operational simplicity through automated adaptation.
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
The solution enables precise and timely detection of target objects even in environments with severe clutter, enhancing safety by distinguishing target signals from noise and improving radar performance in areas with structures that generate strong reflective waves.
Implementation Method 1
detecting a target object using a reflection signal that is reflected after transmitting a radar signal
Implementation Method 2
determining a presence of a clutter structure using frequency response information of the reception signal
Data Source
AI summary
A radar apparatus comprises a signal transmission unit, a signal reception unit, a determination unit, and a target detection unit. The signal transmission unit transmits a transmission signal for detecting a target object. The signal reception unit receives a reception signal generated when the transmission signal is reflected. The determination unit determines a presence of a clutter structure using frequency response information of the reception signal. The target detection unit detects a target object by correcting a detection threshold value for detecting a target object according to the determination result on the presence of the clutter structure and detects a target object.