Open AccessPhotonics‐based wideband Doppler frequency shift measurement by in‐phase and quadrature detection
Author(s) -
Zhang Fangzheng,
Shi Jingzhan,
Pan Shilong
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2018.0873
Subject(s) - wideband , frequency modulation , photonics , doppler effect , quadrature (astronomy) , electronic engineering , optics , phase modulation , physics , radio frequency , computer science , telecommunications , phase noise , engineering , astronomy
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.