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Photonics-Based Multifunction System for Radar Signal Transmit-Receive Processing and Frequency Measurement
Dengcai Yang1, Ya Zhang1, Feng Yang1
1School of Physics and Optoelectronic Engineering, Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China.
Micromachines
|September 28, 2024
Summary
A new photonic-assisted radar system enables multifunctional capabilities including frequency-doubled LFM signal generation and self-interference cancellation. This advanced radar offers improved performance for applications like UAVs and automotive systems.
Area of Science:
- Photonics
- Radar Systems Engineering
- Signal Processing
Background:
- Traditional radar systems face limitations in achieving multifunctional capabilities within compact form factors.
- Integrating advanced signal processing techniques like photonic assistance is crucial for next-generation radar.
Purpose of the Study:
- To propose and experimentally validate a novel photonic-assisted multifunctional radar system.
- To demonstrate simultaneous LFM signal generation, de-chirp reception, self-interference cancellation, and frequency measurement.
Main Methods:
- Photonic frequency doubling to generate a high-frequency, broadband local oscillator (LO) signal.
- Photonic-assisted self-interference cancellation during de-chirp reception.
- Microwave frequency measurement based on IF electrical filter envelope response time.
Main Results:
- Achieved a 12-18 GHz LFM signal using photonic frequency doubling.
- Demonstrated over 12.1 dB interference reduction with photonic-assisted self-interference cancellation for a 6 GHz LFM bandwidth.
- Attained a frequency measurement resolution better than 14 MHz in the 12.14-18.14 GHz range.
Conclusions:
- The proposed photonic-assisted radar system integrates multiple functions efficiently.
- The system's design is suitable for miniaturized, continuous-operation radar in UAVs, automotive applications, and close-range sensing.
- Significant simplification of radar system structure and reduced space occupation were achieved.
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