A Simple and All-Optical Microwave Doppler Frequency Shift and Phase Measurement System Based on Sagnac Loop and I/Q Detection

Gao, Yongsheng; Kang, Bochao; Chen, Yibo; Zhao, Ying; Zhang, Wu; Fan, Yangyu

doi:10.1109/tim.2020.3041898

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…At present, there are many photonics-related methods for measuring the DFS [6][7][8][9][10][11][12] and AOA. The measurement of the DFS can usually be obtained from the down-converted intermediate frequency (IF) signal.…”

Section: Introductionmentioning

confidence: 99%

A Simple Photonic System for DFS and AOA Simultaneous Measurement

Tao

et al. 2022

Photonics

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A simple photonics-based dual-channel system is proposed to simultaneously measure the Doppler frequency shift (DFS) and angle of arrival (AOA) of microwave signals. The system applies two parallel push–pull Mach–Zehnder modulators (MZMs) for carrier suppression dual-sideband (CS-DSB) modulation. The introduction of the reference signal results in a DFS measurement without direction ambiguity. The DFS can be determined by measuring the frequency of the down-converted intermediate frequency (IF) signal, and the AOA can be calculated by comparing the phase shift of the two channels. A proof-of-concept experiment shows that the DFS measurement error is less than 0.4 Hz during ±100 kHz, and the AOA measurement error is within 1.5° in a range of 0–70°.

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Section: Introductionmentioning

confidence: 99%

A Simple Photonic System for DFS and AOA Simultaneous Measurement

Tao

et al. 2022

Photonics

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“…So far, a series of photonics systems to measure DFS [14][15][16][17][18][19][20] or AOA [21][22][23][24][25] have emerged. For example, [20] uses a parallel dual parallel Mach-Zehnder modulators (DPMZM) combing reference signal to measure DFS.…”

Section: Introductionmentioning

confidence: 99%

A Simple Photonics-Based Measurement Method for Microwave DFS and AOA

Jia

Sun

et al. 2022

IEEE Photonics J.

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This article put forwards a simple microwave photonics measurement method for microwave doppler frequency shift (DFS) and angle of arrival (AOA), which obtains the information conveniently and precisely by comparing the frequency and phase shift between two channels signals. The DFS direction can be judged more intuitively thanks to the introduction of the reference signal. The system uses two parallel dual parallel Mach-Zehnder modulators (DPMZMs) for carrier suppression single-sideband (CS-SSB) modulation. A proof-of-concept experiment was taken, showing that during ±100 kHz, the DFS measurement error is <±0.1 Hz over a 40 GHz frequency range as well as power sensitivity is down to -50 dBm. What is more, the measurement error of AOA is < ±1° from 0° to 90°. This simple system acquits excellent width band performance without the optical filter, providing a reliable and more conducive to humancomputer interaction solution for future measurement and sensing applications.

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