摘要
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°.
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°.
基金
supported by the Program for New Century Excellent Talents in University(No.NCET-11-0659)
the National 111 Project of China(No.B12018)
the Priority Academic Program Development of Jiangsu Higher Education Institutions
