Radar Target Simulator Range Migration Correction
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Solution Overview
Problem
Conventional Radar Target Simulators (RTS) fail to accurately model the effects of range migration on virtual target movement, leading to ambiguity and inaccuracy in radar sensor testing.
Innovation Solution
A radar target simulator device that includes a processor and memory, capable of generating a virtually reflected waveform based on changes in the position of a virtual target, by shifting the phase of the test sensor probe signal according to the target's velocity and time shifting the signal according to the target's position change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional RTS models virtual target movement by adding only Doppler frequency shift, then the system is simple to operate, but the simulation accuracy deteriorates due to range migration effects
Solution Approach 1:
The patent applies parameter changes by modifying the waveform generation parameters to include time-shifting based on virtual target position changes. The system calculates position-dependent time shifts and applies them to the probe signal, transforming the simulation from a simple Doppler-only model to one that accurately captures range migration effects through parameter modification.
Solution Approach 2:
The system performs preliminary calculation of the virtual target's position changes and pre-computes the corresponding time shifts before generating the virtually reflected waveform. This preliminary action ensures that range migration effects are accurately accounted for in the simulation without requiring complex real-time processing during signal transmission.
2Reliability
If RTS does not account for range migration, then the device complexity is low, but the reliability of sensor performance assessment deteriorates
Solution Approach 1:
The system implements feedback by continuously updating the virtual target position and recalculating the corresponding time shifts for each probe signal transmission. This feedback mechanism ensures that the virtually reflected waveform accurately reflects the current state of the virtual target, improving the reliability of sensor performance assessment under dynamic conditions.
Solution Approach 2:
The patent replaces complex mechanical or physical target movement systems with a computational model that calculates position changes and applies corresponding time shifts to the waveform. This substitution achieves accurate range migration simulation through signal processing rather than physical mechanisms.
3Measurement precision
If RTS accurately models range migration effects, then measurement precision improves, but the difficulty of detecting and measuring increases
Solution Approach 1:
The system introduces an intermediary computational layer that calculates the relationship between virtual target position changes and corresponding time shifts in the waveform. This intermediary processing step translates complex range migration effects into manageable time-shift parameters that can be applied systematically to the probe signal.
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 enables more accurate simulation of moving targets, improving the assessment of radar sensor performance by correctly accounting for range migration effects, thereby reducing ambiguity and enhancing testing accuracy.
Implementation Method 1
shifting a phase of the test sensor probe signal by a Doppler correction according to the velocity of the first virtual target
Data Source
AI summary
Disclosed herein is a radar target simulator (RTS) device including a processor and a memory. The memory stores computer-readable instructions that, when executed by the processor, cause the processor to perform acts including receiving a test sensor probe signal from a test sensor. The acts further include generating a first virtual target for a radar target simulation and transmitting a virtually reflected waveform responsive to the test sensor probe signal for the radar target test simulation, wherein the virtually reflected waveform is based at least in part on a change in a position of the first virtual target.