Photonics-based wideband Doppler frequency shift measurement by in-phase and quadrature detection

被引：19
|
作者：
Zhang, Fangzheng [1 ]
Shi, Jingzhan [1 ]
Pan, Shilong [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Nanjing 210016, Jiangsu, Peoples R China
来源：
ELECTRONICS LETTERS | 2018年 / 54卷 / 11期
关键词：
phase modulation; Doppler shift; optical modulation; measurement errors; optical information processing; optical variables measurement; light polarisation; microwave photonics; quadrature detection; polarisation modulation; simple signal processing; direction discrimination; carrier frequency range; measurement error; Doppler frequency shift measurement scheme; compact structure; in-phase detection; photonics-based wideband Doppler frequency shift measurement; cascaded phase modulation; DFS measurement; frequency; 5; 0 GHz to 40; 0; GHz;
D O I：
10.1049/el.2018.0873
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The authors propose and demonstrate a photonics-based wideband Doppler frequency shift (DFS) measurement scheme through in-phase and quadrature detection. The system has a compact structure applying cascaded phase modulation and polarisation modulation. It is easy to implement since both the value and sign of the DFS can be estimated by simple signal processing. More importantly, the proposed scheme is suitable for both DFS measurement and direction discrimination over a very wide frequency range. In the experiment, accurate DFS measurement with a large carrier frequency range from 5 to 40 GHz is demonstrated with the measurement error kept within +/- 12 Hz.
引用
收藏
页码：708 / 709
页数：2
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