TY - JOUR
T1 - 50 GHz optical true time delay beamforming in hybrid optical/mm-wave access networks with multi-core optical fiber distribution
AU - Morales, Álvaro
AU - Monroy, Idelfonso Tafur
AU - Nordwall, Fredrik
AU - Sørensen, Tommi
PY - 2018/4/10
Y1 - 2018/4/10
N2 - We propose and experimentally validate an optical true time delay beamforming scheme with straightforward integration into hybrid optical/millimeter (mm)-wave access networks. In the proposed approach, the most complex functions, including the beamforming network, are implemented in a central office, reducing the complexity and cost of remote antenna units. Different cores in a multi-core fiber are used to distribute the modulated signals to high-speed photodetectors acting as heterodyne mixers. The mm-wave carrier frequency is fixed to 50 GHz (VBand), thereby imposing a progressive delay between antenna elements of a few picoseconds. That true time delay is achieved with an accuracy lower than 1 ps and low phase noise.
AB - We propose and experimentally validate an optical true time delay beamforming scheme with straightforward integration into hybrid optical/millimeter (mm)-wave access networks. In the proposed approach, the most complex functions, including the beamforming network, are implemented in a central office, reducing the complexity and cost of remote antenna units. Different cores in a multi-core fiber are used to distribute the modulated signals to high-speed photodetectors acting as heterodyne mixers. The mm-wave carrier frequency is fixed to 50 GHz (VBand), thereby imposing a progressive delay between antenna elements of a few picoseconds. That true time delay is achieved with an accuracy lower than 1 ps and low phase noise.
UR - http://www.scopus.com/inward/record.url?scp=85050871961&partnerID=8YFLogxK
U2 - 10.3788/COL201816.040603
DO - 10.3788/COL201816.040603
M3 - Article
AN - SCOPUS:85050871961
SN - 1671-7694
VL - 16
JO - Chinese Optics Letters
JF - Chinese Optics Letters
IS - 4
M1 - 040603
ER -