Open AccessImproved Sensitivity RF Photonics Doppler Frequency Measurement System
Author(s) -
Hossein Emami,
Mohammadreza Hajihashemi,
Sayed Ehsan Alavi
Publication year - 2016
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2016.2598787
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
An improved sensitivity Doppler frequency measurement system based on microwave photonics technology was demonstrated practically. The system employs a four-wave mixing effect to achieve broad radio-frequency (RF) frequency measurement. In addition, a lock-in amplification technique was utilized to achieve high-measurement sensitivity. The system is, thus, capable of Doppler frequency estimation of radar echoes with a carrier frequency up to 40 GHz and a power level as low as -35 dBm.