Radio Technologies for 5G Using Advanced Photonic ...
Transcript of Radio Technologies for 5G Using Advanced Photonic ...
Radio Technologies for 5G Using Advanced Photonic Infrastructure
for Dense User Environments
Hiroshi MurataOsaka University, Japan
Andreas StöhrUniversity of Duisburg-Essen, Germany
6th Japan-EU Symposium on ICT Research and InnovationMakuhari Messe, 6-7 October 2016.
Oct. 2014 ~ Sep. 2017 (3-years)
Photonic-Based 5G technology・MMW/MW heterogeneous cell・WDM-based C-RoF
Wireless resource controlBeam formingSDM/MIMO
・Field trials in stadium & mall
5G
Participants of RAPID
European Participants
Japanese ParticipantsProf. Andreas StöhrUniv. Duisburg-Essen
Prof. Hiroshi MurataOsaka Univ.
5G
Technical Topics in RAPID
MMW/Photonic device & sub-system60GHz radio transceiver with high SNR MMW signal Steerable 60GHz antenna technologies60GHz signal receiverPhotonic-based MMW signal generation/controlOptical-Electrical conversion/SNR analysis
System & Life-cycle testPhotonic-based MMW distribution networkMobile terminal localizationMMW experiments in fields
5G
Schematic set-up for interfacing the transceiver with a WDM-PON network
DSO: digital sampling oscillator,AWG: Arbitrary waveform generator
AWG: Arrayed waveguide grating (for WDM MUX and DEMUX)
System architecture of RoF-based wireless link
5G
Measured results
• IQ wireless data transmission was conducted achieving a spectral efficiency of:
1. ~ 9 bit/s/Hz (9.8 Gbit/s over 1 GHz signal bandwidth)2. 6 bit/s/Hz (21 Gbit/s over 3.5 GHz signal bandwidth)
Pow
er [d
Bm]
0 1 5 632 4
0
-20
-40
-120
-140
Frequency [GHz]
15
17
22
23
21
SNR
[dB]
16
Subcarrier50 100 150 200 250 300In phase
Qua
drat
ure
• 64 QAM signal achieving 6 bit/s/Hz in spectral efficiency• EVM = 11.57% which translates to a BER < 2 x 10-6
5G
Measured results
AMP.: Amplifier , Ant.: Antenna, Attn.: Attenuation, AWG: Arbitrary waveform generator, BW= Bandwidth, CPX: Coherent Photonic mixer , LD: Distributed feedback Laser diode, LNA: Low noise amplifier, LPF: Low pass filter, PC: Polarization controller, SMF: Single mode fiber,
LD-1 MZM
Real Time Scope
AWG
PCLPF
BW=6.4 GHz
Vbias =3.2V
LNA @60 GHzBW=7 GHz, G= 34 dB
LPF BW=6.4 GHz
Attn.
SMF
LD-2
PC
CPX SBD
D=1m
User equipment (UE)
Radio access unit (RAU)
Central station(CS)
Attn. Attn.LNA @60 GHzBW=20GHz, G= 34 dB
LPF, BW=6.4 GHz
AMP,BW=18 GHz G=28 dB
AMP,BW=18 GHz G=28 dB
Ant. Ant.
= +8.2 dBM= 1550.49nm
= 1550.00nm= +10.0 dBM
64 QAM1024 QAM
5G
Beam steering SIW leaky-wave antenna
Direct feed from PD
Compact and low cost PCB based antenna structure
High directivity and beam steering experimentally
5G
Lens assisted beam switching RFIC
Main RFIC
32 radiating elements Secondary RFIC for testing
Dimensions: 20mm x 40mm
mm-wave lens
LTCC with radiating elements
5G
Lens assisted beam switching RFIC
Radiating elements
array
Focal plane
Dielectric lens
Focal axis
5G
MMW data transmission experiment using array-antenna electrode EO modulator
PC: Polarization ControllerEDFA: Erbium Doped Fiber AmplifierPD: PhotodiodeSA: Spectrum Analyzer
OBPF: Optical Bandpass FilterLD: Laser DiodeSG: Signal GeneratorLNM: LiNbO3 Modulator
(A)
(C)
(B)
QPSK signal: SR~500 MHz
~GHz
~60GHz
~30GHz
5G
Constellation diagram of transmitted MMW signal
(C) Transmitted 60GHz-band signal (after LW-MMW signal reconversion)
(B) 60GHz signal from PD with optical 2-tone input
EVM: 6.0%
Symbol Rate: 250 MHz
Frequency : 58 GHz
EVM: 15.8%
Symbol Rate: 250 MHz
Frequency : 58 GHz
5G
Processing of radio signal in optical domain
• Mobile terminal location using time domain difference of arrival (TDOA) method
• Method estimates distance using hyperbolic curve calculation
5G
Processing of radio signal in optical domain
• Using a distributed antenna system has following advantages:− Distribution loss is low− TDOA measurement accuracy is very high− Position of mobile terminal can be calculated before handshake
• Simulation of position error distribution is shown below• Here 4 RAUs were used having a distance of 30m
RAU1
RAU2 RAU3
RAU4
5G
1st Demonstration at GAMBA OSAKA stadium
Friendship agreement between Osaka University and GAMBA Osaka football company realizes our 1st demonstration at densely environment
5G
Signal intensity distribution at Stadium seat
Contour Plot 3D Contour Plot
Relatively less signal intensity was observed at lower seat
Antenna profile and seat configurationaffect signal intensity
5G
Dense area with low mobility – shopping districts
Finalization of testbed (mall) selection Stary Browar (Poznań)
Blue City (Warszawa)
5G
Conclusion
RAPID for centralized 5G radio access network Fusion of advanced photonic & MMW technologies MMIC / Beam forming / E-O&O-E conversion MMW wireless front-end
WDM C-RoF based heterogeneous network
11 EU & Japan partners Developing key technologies with good collaboration
Field trials Big football stadium => Olympic/Paralympic games Shopping center Aircraft, Train etc.