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- Title
Photonics-Based Simultaneous DFS and AOA Measurement System without Direction Ambiguity.
- Authors
Meng, Qingqing; Zhu, Zihang; Wang, Guodong; Li, He; Xie, Lingrui; Zhao, Shanghong
- Abstract
A novel scheme that can simultaneously measure the Doppler frequency shift (DFS) and angle of arrival (AOA) of microwave signals based on a single photonic system is proposed. At the signal receiving unit (SRU), two echo signals and the reference signal are modulated by a Sagnac loop structure and sent to the central station (CS) for processing. At the CS, two low-frequency electrical signals are generated after polarization control and photoelectric conversion. The DFS without direction ambiguity and wide AOA measurement can be real-time acquired by monitoring the frequency and power of the two low-frequency electrical signals. In the simulation, an unambiguous DFS measurement with errors of ±3 × 10−3 Hz and a −90° to 90° AOA measurement range with errors of less than ±0.5° are successfully realized simultaneously. It is compact and cost-effective, as well as has enhanced system stability and improved robustness for modern electronic warfare systems.
- Subjects
DOPPLER effect; MEASUREMENT errors; MILITARY electronics; ELECTRONIC systems; AMBIGUITY; MICROWAVE photonics
- Publication
Micromachines, 2023, Vol 14, Issue 2, p457
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi14020457