Radar Signal Processing Using Auto-Correlation for Extended Detection Range
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Solution Overview
Problem
Current radar signal processing systems with FMCW schemes have a limited maximum detection distance due to the period of the transmission radar signal, which restricts target detection accuracy and efficiency when trying to increase the detection range.
Innovation Solution
The method involves consecutively transmitting multiple radar signals with assigned indices, applying auto-correlation to verify arrival times, and calculating large and small scale ranges using beat frequencies to extract location information, thereby extending the detection distance without degrading target detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the period of the transmission radar signal is increased to extend the maximum detection distance, then the detection range is improved, but the target detection accuracy degrades
Solution Approach 1:
The patent divides the detection process into multiple segments by transmitting multiple chirp signals with different periods. Each chirp signal corresponds to a specific detection range segment, allowing the system to achieve both long-range and high-precision detection by selecting appropriate segments based on target distance
Solution Approach 2:
The system dynamically adjusts the period of transmission radar signals based on the detection requirements. By using multiple chirp signals with different periods and selectively processing them, the system optimizes the balance between detection range and accuracy for different operational scenarios
2Length of stationary object
If multiple transmission radar signals with different periods are used to extend detection range, then the detection distance is improved, but the device complexity increases
Solution Approach 1:
The patent performs preliminary classification of received signals based on their correlation with different chirp signals before full processing. By verifying arrival times and identifying which chirp signal corresponds to the target echo, the system reduces subsequent processing complexity while maintaining extended detection range capability
Solution Approach 2:
The system uses correlation results as an intermediary to bridge multiple chirp signals with different periods. By applying auto-correlation to identify arrival times and match them with specific transmission signals, the system integrates information from multiple signals without requiring complex simultaneous processing
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 allows for accurate determination of target location over an extended range by using auto-correlation and beat frequency calculations, enhancing the radar system's detection capabilities without compromising accuracy.
Implementation Method 1
transmitting a plurality of transmission radar signals through a transmission antenna, receiving a reception radar signal reflected from a target
Implementation Method 2
receiving a reception radar signal reflected from a target in response to the transmitting
Implementation Method 3
extracting location information on the target based on a result obtained by applying an auto-correlation to the reception radar signal
Implementation Method 4
calculating a small scale range based on a beat frequency between a transmission radar signal and a reception radar signal
Data Source
AI summary
Provided is a radar signal processing method and apparatus, the method including transmitting a plurality of transmission radar signals through a transmission antenna, receiving a reception radar signal reflected from a target in response to the transmitting, and extracting location information on the target based on a result obtained by applying an auto-correlation to the reception radar signal.