Non-Contiguous Reference Regions for Radar Target Detection
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Solution Overview
Problem
Existing radar technologies face challenges in accurately detecting targets due to false alarms and noise interference, particularly in environments with cluttered signals, leading to reduced detection accuracy.
Innovation Solution
The electronic device employs a constant false alarm rate (CFAR) method using order statistic processing (OS-CFAR), which establishes non-contiguous reference regions in both the distance and relative velocity directions to set thresholds based on signal intensities, improving target detection accuracy by suppressing noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional radar detection methods are used, then the detection process is simple, but the detection accuracy is reduced due to false alarms and noise interference
Solution Approach 1:
The patent divides the detection process into distinct segments: establishing reference regions, determining thresholds based on order statistics, and performing constant false alarm rate detection. This segmentation allows complex noise suppression to be broken down into manageable steps that improve detection accuracy without overwhelming complexity
Solution Approach 2:
The patent performs preliminary actions by establishing reference regions and determining thresholds before actual target detection. By pre-processing the signal to create reference data and set appropriate thresholds, the system eliminates false alarms and noise interference before they can affect detection accuracy
2Object-affected harmful factors
If reference regions are established contiguously, then the processing is simpler, but the noise interference is not effectively suppressed
Solution Approach 1:
The patent transitions from one-dimensional contiguous reference regions to two-dimensional non-contiguous reference regions in the distance-velocity plane. This dimensional change allows the system to suppress noise interference more effectively by considering both distance and velocity components simultaneously, while the non-contiguous arrangement prevents noise from propagating across reference regions
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 enhances target detection accuracy by effectively distinguishing between target signals and noise, even in complex environments, thereby improving the reliability of distance and velocity measurements.
Implementation Method 1
a radar (Radio Detecting and Ranging) technology for measuring a distance or the like to an object such as an obstacle by transmitting a radio wave such as a millimeter wave and receiving a reflected wave reflected off the object
Implementation Method 2
receiving a reflected wave that is the transmission wave having been reflected
Data Source
AI summary
An electronic device includes a transmission antenna that transmits a transmission wave, a reception antenna that receives a reflected wave that is the transmission wave having been reflected, and a control unit. The control unit detects a target by using a constant false alarm rate, based on a transmission signal transmitted as the transmission wave and a reception signal received as the reflected wave. The control unit establishes reference regions non-contiguously in a distance direction and a relative velocity direction with respect to a test region in a two-dimensional distribution of signal intensities based on the reception signal in the distance direction and the relative velocity direction. The control unit sets a threshold for use in detection of the target, based on an order statistic among the signal intensities in the reference regions.