Dual-Antenna Virtual Target Generator Without Prior Frequency Knowledge
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Solution Overview
Problem
Existing virtual target generators for RADAR systems face challenges in accurately simulating moving targets due to the need for a priori knowledge of the frequency content of incoming pulses, leading to errors and noise in phase calculations.
Innovation Solution
A Target Generator (TG) with two antennas separated by a defined distance d, using phase delay calculations to generate virtual targets without requiring prior knowledge of the frequency, by calculating phase delay as ∅ n = R ⋅ ΔØ d = R + nv ⋅ ΔØ d , where R is the range, ΔØ d is the phase change rate, v is target velocity, and ω s is the sample rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single receiver is used in the Target Generator, then the device complexity is reduced, but the measurement precision of phase calculations deteriorates due to inability to infer frequency information
Solution Approach 1:
The single receiver is segmented into multiple receivers (first and second receivers) positioned at different locations. Each receiver independently receives the radar signal, enabling frequency inference through comparison of received signals and improving phase calculation precision without requiring a priori frequency knowledge.
2Measurement precision
If a priori frequency knowledge is required for phase calculations, then the measurement precision is maintained, but the adaptability of the system deteriorates
Solution Approach 1:
The system performs self-service by using multiple receivers to automatically infer the frequency of incoming radar pulses through signal comparison. This eliminates the need for external frequency information or manual configuration, allowing the system to adapt to different radar systems and operating conditions autonomously while maintaining measurement precision.
3Measurement precision
If multiple receivers are used to infer frequency information, then the adaptability and measurement precision are improved, but the device complexity increases
Solution Approach 1:
The patent introduces a processor as an intermediary that automatically performs frequency inference by comparing signals from multiple receivers. This intermediary component manages the complexity of multiple receivers, coordinating their operation and processing their outputs to generate accurate phase calculations without requiring manual configuration or external frequency information.
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
Enables the creation of realistic virtual targets with reduced errors by inferring frequency information through multiple receivers, eliminating the need for prior frequency knowledge and minimizing noise in phase calculations.
Implementation Method 1
a Target Generator (TG) with two antennas separated by a defined distance d, using phase delay calculations to generate virtual targets
Data Source
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AI summary
Disclosed is a Target Generator, TG, for use with a RADAR system to generate a virtual target in response to the TG receiving a signal from the RADAR system, wherein the TG comprises first and second antennas arranged to receive the signal from the RADAR, the first and second antennas arranged such that they are separated by a defined distance, d, in a propagation direction of the signal from the RADAR.