Microwave angle-of-arrival measurement utilizing photonic real-time Fourier transformation

Zihao Wang; Dan Zhu; Bowen Zhang; Jiewen Ding; Shilong Pan

doi:10.1117/12.2620740

26 July 2022 Microwave angle-of-arrival measurement utilizing photonic real-time Fourier transformation

Zihao Wang, Dan Zhu, Bowen Zhang, Jiewen Ding, Shilong Pan

Proceedings Volume 12278, 2021 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing; 122780V (2022) https://doi.org/10.1117/12.2620740
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

A microwave angle-of-arrival (AOA) measurement system based on the photonic real-time Fourier transformation (RTFT) is proposed and demonstrated. In the proposed system, photonic RTFT is implemented utilizing the temporal-spectrum convolution system, which is composed by an optical pulse source, an electro-optical modulator and a pair of dispersive elements with complementary dispersion values. The time delay of the linearly frequency-modulated (LFM) signals can be obtained, which are used to calculate the time-difference-of arrival (TDOA) and the corresponding AOA. A proof-ofconcept experiment is taken. The AOA measurement range from 25° to 155° is achieved with a measurement error of less than 3.4°. In this scheme, the problem of phase ambiguity in traditional AOA measurement systems is overcome.

Citation Download Citation

Zihao Wang, Dan Zhu, Bowen Zhang, Jiewen Ding, and Shilong Pan "Microwave angle-of-arrival measurement utilizing photonic real-time Fourier transformation", Proc. SPIE 12278, 2021 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing, 122780V (26 July 2022); https://doi.org/10.1117/12.2620740

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