Abstract

A photonic system based on a two-channel structure is proposed to realize the simultaneous measurement of angle-of-arrival (AOA) and Doppler-frequency-shift (DFS) of microwave signal without direction ambiguity. The unambiguous AOA measurement can be acquired by recording the power of the output intermediate frequency (IF) signal and output radio frequency (RF) signal from two channels. The DFS can be determined from the frequency of the IF signal. Estimated experimental results show that a −66.44° to 66.44° AOA measurement with errors of less than ±2.2° and an unambiguous DFS measurement with errors of ±0.6 Hz are implemented.

Photonic approach for Doppler-frequency-shift and angle-of-arrival measurement with direction unambiguity and high precision

Qirui Lin and Jianxin Ma
Appl. Opt. 62(6) 1447-1455 (2023)

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Chongjia Huang, Hao Chen, and Erwin H. W. Chan
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Photonic approach for simultaneous measurements of Doppler-frequency-shift and angle-of-arrival of microwave signals

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Simultaneous and unambiguous identification of DFS and AOA without dependence on echo signal power

Guangyi Li, Xinagyan Meng, Lu Wang, Ming Li, Ninghua Zhu, and Wei Li
Opt. Lett. 48(4) 1028-1031 (2023)