Radar Target Emulator Superimposition Apparatus Phase Jump Reduction
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Solution Overview
Problem
Existing radar target emulators face challenges in simulating continuous movement of objects without significant high-frequency signal phase jumps, which affects the accuracy of test scenarios for driver assistance systems.
Innovation Solution
A radar target emulator with a superimposition apparatus that combines two delay signals of different lengths using attenuation and addition devices, allowing for adjustable attenuation to create a 'center of mass' delay and reduce phase jumps, enabling realistic simulation of object movement across various distance intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If discrete delay segments are switched to simulate object movement, then distance segments can be changed, but high-frequency signal phase jumps occur affecting movement continuity
Solution Approach 1:
The system dynamically adjusts the attenuation factors α1 and α2 in real-time to continuously vary the effective delay between discrete segments. This dynamic control allows smooth transitions between delay segments by continuously modulating the signal weights, eliminating abrupt phase jumps while maintaining the ability to change distance segments.
Solution Approach 2:
The invention changes the attenuation parameters (α1, α2) to create a continuous weighted average of delay segments. By varying these parameters continuously rather than switching discrete segments, the system achieves smooth delay transitions that maintain signal phase continuity while enabling distance segment changes.
2Adaptability or versatility
If multiple delay lines are used to cover different distance ranges, then distance coverage is improved, but device complexity increases
Solution Approach 1:
The system merges multiple delay segments into a single coherent output by using a superposition mechanism with adjustable attenuation factors. Instead of requiring separate active delay lines for different distance ranges, the invention combines multiple delay segments within one structure, using the attenuation parameters to selectively weight their contributions and achieve various effective delays.
Solution Approach 2:
The superposition apparatus serves multiple functions: it can generate various delay values by adjusting attenuation factors, it maintains signal phase continuity, and it covers extended distance ranges. This multi-functional design eliminates the need for separate specialized delay lines for different distance ranges, reducing overall device complexity.
3Reliability
If attenuation devices are used to weight delay signals, then continuous movement simulation is achieved, but signal processing complexity increases
Solution Approach 1:
The system uses adjustable attenuation parameters (α1, α2) as the primary control mechanism for weighting delay signals. By changing these parameters continuously, the system achieves accurate movement simulation without requiring complex signal processing structures. The parameter-based control simplifies the overall system architecture compared to more complex signal manipulation approaches.
Data Source
AI summary
A radar target emulator with a superimposition apparatus, having a first input provided to receive a first signal, a second input provided to receive a second signal, a first attenuation device that is connected to the first input in signal-carrying fashion and configured to attenuate the first signal, in particular to a predetermined extent, and to provide a first attenuated signal, a second attenuation device that is connected to the second input in signal-carrying fashion and configured to attenuate the second signal, in particular to a predetermined extent, and to provide a second attenuated signal, an addition device that is configured to add the first attenuated signal and the second attenuated signal and to output a corresponding output signal.