Unambiguous measurement of AOA using a DDMZM

Li, Guangyi; Shi, Difei; Wang, Lu; Xiao, Ye; Li, Ming; Zhu, Ning; Li, Wei

doi:10.1016/j.optcom.2022.128132

Cited by 10 publications

(2 citation statements)

References 15 publications

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“…uring intelligent driving, radar detection, wireless communication, internet of things and other emerging fields, it is critical to determine the real-time location of moving objects [1][2], which involves doppler frequency shift (DFS) as well as angle of arrival (AOA) measurements [3][4][5][6]. DFS is the frequency shift between the back and come signals [7], and is applied to obtain the velocity of the object.…”

Section: Introductionmentioning

confidence: 99%

“…DFS is the frequency shift between the back and come signals [7], and is applied to obtain the velocity of the object. The angle of the moving target can be estimated by AOA, which can be calculated through the phase difference between the echoes received by spatially-separated antennas [1][2][3][4][5][6][7]. However, the narrow bandwidth and poor stability of key electronic devices limit the application of traditional electrical systems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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