Open AccessPhotonics-Based Broadband RF Spectrum Measurement With Sliced Coherent Detection and Spectrum Stitching Technique
Author(s) -
Guangyu Gao,
Lihua Lei
Publication year - 2017
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.2017.2757609
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
A novel photonics-based channelization approach is proposed for broadband radio frequency (RF) spectrum measurement with a single optical frequency comb, sliced coherent detection (SCD), and improved fast fourier transform-based digital signal processing. Through SCD, channel estimation and spectrum stitching, a broadband and complex RF spectrum can be detected and reconstructed with vector information in a high fidelity. A two-channel architecture as a proof of concept is characterized numerically with up to 40 GHz operation bandwidth, ≤12.5 GHz analysis bandwidth per channel, 113 dB·Hz2/3 spurious free dynamic range, and 161 dB·Hz linear dynamic range. The potentials for further system developments in practice are also discussed.