MIMO Radar Doppler Multiplexing for Cross-Range Target Detection
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Solution Overview
Problem
Current radar systems, particularly MIMO radars, face challenges in accurately detecting target objects, especially when they are moving in cross-range directions, due to limitations in Doppler velocity detection and interference between monostatic and multistatic configurations, which can lead to erroneous detection and reduced positioning accuracy.
Innovation Solution
The implementation of a radar apparatus with a multistatic configuration using multiple MIMO radars with different Doppler multiplexing intervals, allowing for simultaneous multiplexing transmission and reception processing, which enhances target detection accuracy by distinguishing between Doppler components from different radar sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple MIMO radars are used for wide-angle sensing, then the sensing coverage is improved, but interference between monostatic and multistatic configurations increases detection errors
Solution Approach 1:
The patent segments the radar system into multiple MIMO radar sections, each independently configured with specific Doppler multiplexing intervals. This segmentation allows each section to operate with optimized parameters while reducing interference from other sections, thereby maintaining detection accuracy across wide sensing coverage.
Solution Approach 2:
Different Doppler multiplexing intervals are assigned to different radar sections based on their specific operational requirements and interference environments. This local optimization of parameters ensures that each section achieves optimal detection performance while contributing to the overall wide-angle sensing capability.
2Measurement precision
If Doppler velocity detection is enhanced for moving targets, then target detection capability is improved, but interference between radar sections causes erroneous detection
Solution Approach 1:
The patent changes the Doppler multiplexing interval parameter for each radar section to unique values. This parameter differentiation allows the system to resolve Doppler velocity measurements from multiple sections simultaneously without interference, improving both measurement precision and detection reliability for moving targets.
3Productivity
If simultaneous multiplexing transmission is implemented, then detection efficiency is improved, but interference between sections reduces positioning accuracy
Solution Approach 1:
Each radar section is configured with locally optimized Doppler multiplexing intervals that are differentiated from other sections. This allows simultaneous multiplexing transmission across all sections without mutual interference, maintaining both high detection efficiency and accurate positioning measurements.
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 improves the efficiency and accuracy of target detection by reducing interference and enhancing Doppler velocity measurement, thereby improving the overall detection performance and positioning capabilities of the radar system.
Implementation Method 1
a radar apparatus that transmits a transmission signal from a plurality of transmission antennas and receives a reflected wave
Implementation Method 2
a first interval of each Doppler shift amount applied to the first transmission signal transmitted from each of the plurality of first transmission antennas is different from a second interval of each Doppler shift amount applied to the second transmission signal
Data Source
AI summary
A radar apparatus includes: first radar circuitry, which, in operation, transmits a first transmission signal from a plurality of first transmission antennas; and second radar circuitry, which, in operation, transmits a second transmission signal from a plurality of second transmission antennas, in which a first interval of each Doppler shift amount applied to the first transmission signal transmitted from each of the plurality of first transmission antennas is different from a second interval of each Doppler shift amount applied to the second transmission signal transmitted from each of the plurality of second transmission antennas.