Millimeter-Wave Radar Frequency Band Segmentation for Interference Reduction
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Solution Overview
Problem
The increasing use of vehicle-mounted millimeter-wave radars in intelligent driving systems leads to severe mutual interference, reducing detection probability and increasing false alarms, which compromises driving safety and comfort.
Innovation Solution
A method and apparatus that determine a specific frequency band for each detection apparatus, allowing partial overlap with other frequency bands to avoid interference, optimizing frequency resource use and enhancing anti-interference performance, enabling accurate target object detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If vehicle-mounted radars use the same frequency band for detection, then detection coverage is maximized, but mutual interference between radars increases
Solution Approach 1:
The patent segments the frequency band into multiple sub-bands and assigns different sub-bands to different radars. This allows multiple radars to operate simultaneously in the same geographical area without mutual interference, while still maintaining comprehensive detection coverage through coordinated frequency usage.
Solution Approach 2:
The patent introduces frequency dimension as an additional resource dimension for radar operation. By utilizing different frequency sub-bands, the system transforms a one-dimensional spatial detection problem into a multi-dimensional problem involving both space and frequency, thereby resolving interference while maintaining coverage.
2Object-affected harmful factors
If frequency bands are completely separated to avoid interference, then mutual interference is eliminated, but frequency resource utilization decreases
Solution Approach 1:
The patent implements dynamic frequency selection where radars can adaptively choose their operating sub-bands based on real-time detection of other radars' activities. This dynamic approach allows frequency bands to be shared when interference is absent while avoiding overlap when interference is detected, optimizing both interference avoidance and resource utilization.
Solution Approach 2:
The patent changes the frequency parameter of radar operation from a fixed single band to a selectable range of sub-bands. This parameter flexibility allows the system to optimize frequency resource allocation by assigning different sub-bands to different radars based on spatial location, detection requirements, and current interference conditions.
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 effectively reduces mutual interference between radars, improves detection accuracy, and enhances communication capabilities among multiple radars by efficiently utilizing frequency resources.
Implementation Method 1
a first detection apparatus determines a first frequency band, where the first frequency band is one of N frequency bands, and transmits a radio signal on the first frequency band
Data Source
AI summary
A method for detecting a target object implemented by a detection apparatus, where the detection apparatus transmits a radio signal on a frequency band on which mutual interference can be avoided to avoid or reduce interference caused by a transmit signal or a related signal of any detection apparatus when another detection apparatus determines a target. The detection apparatus divides a frequency band or a frequency domain raster based on a determined threshold to allow partial overlapping between frequency bands or rasters.