Back-Projection Radar Imaging for Real-Time Moving Target Positioning
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Solution Overview
Problem
Existing radar devices struggle to accurately detect the position of a moving object in real time using only one radar reception signal from a plurality of reception antennas, leading to inaccuracies in position detection.
Innovation Solution
A high-resolution radar device that includes a transmission antenna, multiple reception antennas, an RF transceiver chip, and a signal processor, which simultaneously receives and converts radar signals into baseband signals, and performs back-projection to detect the position of a moving object using back projection and fast Fourier transform (FFT) to obtain three-dimensional and two-dimensional data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one radar reception signal is used to detect position, then the device complexity is reduced, but the measurement precision deteriorates
Solution Approach 1:
The patent combines multiple radar reception signals from multiple reception antennas into a single back-projected position result. The signal processor integrates information from all reception antennas simultaneously, merging their individual signal contributions to achieve high-precision position detection without requiring complex multi-signal processing architecture.
Solution Approach 2:
The patent creates a virtual image of the moving object at its actual position through back-projection. By projecting the received signals back to their apparent origin, the system creates a precise positional copy that represents the object's location, enabling accurate detection without complex signal manipulation.
2Measurement precision
If multiple radar reception signals are processed simultaneously, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The signal processor performs back-projection automatically using the received signals and their spatial information. The system self-determines the object's position by projecting signals back to their apparent origin, eliminating the need for external intervention or complex control mechanisms while achieving high precision.
Solution Approach 2:
The patent transforms the problem from processing multiple signals in the signal domain to projecting them in the spatial domain. By converting temporal/signal-based processing into spatial-based back-projection, the system achieves simultaneous multi-signal processing without increasing computational complexity.
3Speed
If real-time position detection is achieved, then the speed is improved, but the measurement precision deteriorates
Solution Approach 1:
The signal processor continuously performs back-projection on incoming radar signals to maintain real-time position detection. The system continuously updates the position information by projecting new received signals, ensuring both real-time response and high precision through uninterrupted processing.
Solution Approach 2:
The system pre-establishes the spatial relationships and projection geometry before actual detection occurs. By preparing the back-projection framework in advance, the system can rapidly process new signals without complex real-time calculations, achieving both speed and precision simultaneously.
Data Source
AI summary
A high-resolution radar device is provided, which includes a transmission antenna, a plurality of reception antennas, a radio frequency (RF) transceiver chip, and a signal processor. The transmit antenna transmits the radar transmit signal to the moving object. The plurality of reception antennas simultaneously receive a plurality of radar receive signals reflected from the moving object, respectively. The RF transceiver chip simultaneously converts the plurality of radar received signals into a plurality of baseband signals, respectively. The signal processor simultaneously back-projects the plurality of baseband signals to detect a location of the moving object.