Radar Signal Processing Device for Real Virtual Image Differentiation
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Solution Overview
Problem
Radar devices face increased processing load in distinguishing between real and virtual images due to multipath propagation, leading to potential erroneous detection of targets not originally present.
Innovation Solution
A signal processing device that acquires phase information from virtual antennas formed by combinations of transmission and reception antennas, calculates phase differences for both outward and return paths, and determines path matching using these phase differences to differentiate between real and virtual images without increasing processing load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radio wave transmission and reception is performed by both first detection unit and second detection unit to distinguish virtual images from real images, then detection accuracy is improved, but processing load increases
Solution Approach 1:
The patent extracts only the essential phase difference information from the complex signal processing operations. Instead of performing complete radio wave transmission and reception through both detection units, the system extracts phase difference data from the received signals to determine path matching, thereby reducing processing load while maintaining detection accuracy.
Solution Approach 2:
The patent replaces the mechanical signal transmission and reception process with a computational approach. Instead of physically performing complete radar detection through multiple antenna groups, the system uses phase difference calculations and comparison algorithms to determine whether outward and return paths match, substituting physical measurement with computational analysis.
2Measurement precision
If phase difference calculation is performed for both outward path and return path to determine path matching, then detection accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent merges the phase difference calculation processes for the outward path and return path into a unified determination mechanism. Both phase differences are calculated and then compared together to determine path matching, combining multiple calculations into a single decision-making process that improves accuracy without proportionally increasing complexity.
Solution Approach 2:
The patent changes the approach from calculating complete signal paths to calculating only phase difference parameters. By focusing on phase differences rather than full signal transmission and reception, the system reduces processing complexity while maintaining the ability to accurately determine path matching between outward and return paths.
Data Source
AI summary
A signal processing device includes: an acquisition unit configured to acquire phase information of a reception signal of each of plural virtual antennas generated based on a combination of plural transmission antennas and plural reception antennas; a first calculation unit configured to calculate, based on the phase information, at least one first phase difference between the plural transmission antennas in an outward path along which a transmission wave transmitted from the plural transmission antenna reaches a target; a second calculation unit configured to calculate, based on the phase information, at least one second phase difference between the plural reception antennas in a return path along which a reflected wave reflected by the target reaches the plural reception antennas; and a determination unit configured to determine, based on the first phase difference and the second phase difference, whether the outward path and the return path match each other.