We propose and experimentally demonstrate a photonic approach to estimate the time-difference-of-arrival (TDOA) and the angle-of-arrival (AOA) of a microwave signal. TDOA and AOA are estimated from the carrier power difference of the two outputs of the Mach-Zehnder modulator (MZM) using only one dual-drive 1 × 2 MZM. Experimentally, the TDOA of a microwave signal at 3 GHz from 27.78 to 166.67 ps is measured with maximum measurement errors of ±2.24 ps; correspondingly, the AOA from 60° to 85.2° is measured with maximum measurement errors of ±0.4°.
© 2013 Chinese Optics Letters
Fiber Optics and Optical Communications
Yi Ni, Xuan Kong, Ruixin Wang, Yitang Dai, and Kun Xu, "Photonic angle-of-arrival and time-dif ference-of-arrival measurement based on dual drive 1 × 2 MZM," Chin. Opt. Lett. 11, 030605- (2013)