Radar System Interference Suppression via Segmented Frequency and Modulation
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Solution Overview
Problem
Existing radar systems face interference issues that degrade accuracy in detecting distance and direction, as avoiding overlapping frequency bands narrows frequency bands and shortens modulation periods, compromising resolution in distance and speed detection.
Innovation Solution
A radar system with multiple units, each equipped with a first and second processing unit, and a calculation result determination unit, controls frequency bands and modulation periods to ensure non-overlapping first bands and overlapping second bands, and longer first modulation periods and non-overlapping second periods, allowing for high-speed and high-distance resolution while suppressing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency bands of modulated waves are prevented from overlapping to suppress interference, then interference between radar units is reduced, but frequency band width is narrowed and modulation period is shortened, degrading distance and speed resolution
Solution Approach 1:
The radar system segments the detection function into multiple radar units, each operating with different frequency bands and modulation periods. This segmentation allows parallel operation without interference while maintaining high resolution through diverse parameter sets
Solution Approach 2:
The patent introduces an additional dimension of differentiation by using both frequency band and modulation period as independent variables. This two-dimensional parameter space allows radar units to operate simultaneously without interference while preserving detection resolution
2Measurement precision
If multiple radar units operate simultaneously with overlapping frequency bands to maintain wide bandwidth and long modulation period, then distance and speed resolution is improved, but interference between radar units increases
Solution Approach 1:
The control unit acts as an intermediary that coordinates the operation of multiple radar units. It assigns different frequency bands and modulation periods to each unit, enabling simultaneous operation without interference while maintaining high detection resolution
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 system achieves high-speed and high-distance resolution by combining calculation results from units with different frequency and modulation settings, effectively suppressing interference and enhancing detection accuracy.
Implementation Method 1
a first processing unit configured to calculate a distance and a relative speed to an object in the vicinity of each radar unit in accordance with a beat signal acquired by transmitting and receiving first modulated waves
Data Source
AI summary
A radar system is provided with a plurality of radar units. Each radar unit includes a first processing unit for calculating a distance and a relative speed to an object in the vicinity of each radar unit in accordance with a beat signal, a frequency band of the first modulated waves being a first frequency band, and a modulation period of the first modulated waves being a first modulation period; a second processing unit for calculating a distance to the object in accordance with a beat signal, a frequency band of the second modulated waves being a second frequency band, and a modulation period of the second modulated waves being a second modulation period; and a calculation result determination unit for determining the distance and the relative speed to the object in accordance with calculation results of the first and second processing units.