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• Who is Keysight?
• What’s driving 5G
• The innovations required to make 5G happen
• 5G Testing Considerations
• 5G Network Over-The-Air Performance evaluation and deployment testing
• Overcoming the challenges to 5G data throughput
• A look at some real measurements
• Questions
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• Multi-standard smartphones, tablets, IoT devices
• Networks and cloud environments
• Connected cars
• Clean energy
• Semiconductors
• Aerospace, Defense, and Government
• General electronics
T O H E L P Y O U D E S I G N , T E S T, M A N U FA C T U R E A N D O P T I M I Z E
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in revenuemarket-ready 5G new
radio solutions
available
of the Global 100
companies are
Keysight customers
years of innovation,
measurement
science expertise
US and foreign
patents issued
or pending
of the Top 30 Tech
companies use
Keysight
Market Leader with 80+ Years of Expertise
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Over
test scripts from 2G to 5G
Collaborations with
chipset providers, operators, and NEMs
#1 IN WIRELESS COMMUNICATIONS
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100x
Data Rates
1000x
Capacity100x
Densification1ms Latency
Reliability
99.999%
100x
Energy Efficiency
Ubiquitous Connectivity
5G
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CLOUD
MOBILE DATA TRAFFICMOVES TO CLOUD
APPSBY 2019
MARKET SIZE
BY 2020
Source: Bain
GIGABYTES OF
NEW DATA PER
PERSON / DAY
BY 2020
MARKET SIZE
BY 2026
Source: Ericsson
BIG DATA INTERNET OF THINGS5G
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Mobile Broadband Access
Mission-CriticalMachine Communication
IoT
• all data, all the time
• 2 billion people on social media
• 30 billion ‘things’ connected
• low cost, low energy
• ultra high-reliability
• ultra-low latency
Amazingly fastGreat service In a
crowd
Best experience
follows you
Real-time &
reliable
communications
Ubiquitous things
communicating
Massive Machine Communication
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FLEXIBLE
NETWORKSFASTER
TRANSFERS
LOWER
LATENCY
MOBILE
EXPERIENCE
REAL TIMECONNECTED
WORLD
HIGHER
RELIABILITY
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M M W AV E 5 G B A N D I N U S
unlicensed
27.5 to 28.35GHz 37 to 38.6GHz38.6 to 40GHz 64 to 71GHz
BW: 850MHz 1600MHz 1400 MHz 7000MHz
> 24 GHz3.5-3.8GHz
Telstra, Optus first
deployment for 5G is
3.5-3.8GHz
mmWave will be 24.25-
27.55GHz in 2020
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• Only BS keeps the channel information
• BS antenna number >> the number of UE
• Each antenna can be controlled (gain and phase)
• Dramatically improves SNR at UE, better overall capacity
• Channel noise can be reduced with increase of number of antenna
M U LT I U S E R M I M O W H E N N U M B E R O F A N T. > > N U M B E R O F U E
UP: known Pilots
Channel
Transfer
function
Massive amount of beams
point to single user USER 1: single ant
Only decode user 1 data
USER 2: single ant
Only decode user 2 data
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Once the high 5G data rates and stability are demonstarted in
ideal clean channel conditions the next step is to make the
same happen in real world non-ideal faded & interference
channel conditions.
Multiple cells, users, and radio access technologies
• Multi path fading and spatial diversity
• Antenna patterns and polarizations
• Mobility -> frequency and delay doppler
• Propagation delay offsets
• Noise and Interference from other users and cells
W-CDMA
HSPA+5G NR
LTE-A
Interference
& AWGN
Multipath
fading
Doppler
CA & MIMO
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• Free space path loss = 92.45 + 20 Log (distance in km) + 20 log (freq in GHz)
• Fresnel zone radius = 17.32 x 𝑑/4𝑓 (d in km, f in GHz) (60% of the zone clear)
• Link budget: Received power = Pt + Gt + Gr – path loss – rain fade (2dB/200m) - shadowing loss (20 to
30dB)– foliage loss (10 to 50dB) – atmospheric absorption – terrain – humidity – Fresnel blockage –
system margin
R
Fresnel
Zone
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1. Measure, model, and emulate mmWave channels
2. Measure, model, and emulate wideband baseband
3. Measure and characterize devices over-the-air
4. Emulate 5G network & device -characterize spectral
efficiency gains
5. Emulate and evaluate end-to-end connections
6. Characterize interoperability/coexistence of wireless
standards
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• Path loss / link budget verification
• Antenna pattern verification
• Coverage test (OTA on control channels)
• Band clearing
• Up and downlink control channel verification
• eNB spurious evaluation
• Phase array antenna verification
• User experience test
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Transmitter Ant. Under Test Golden antenna
Spectrum analyzer:
- Zero span
- Sweep time vs antenna
sweep angle
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• 28 GHz frequency
• Understand gNB beam characteristics by measuring signal
power level across azimuth and elevation from base stations
• Calibrated millimeter wave phased array antenna simulates
5G UE antenna performance
• Phased array performance verification showing boresight,
polar antenna pattern with compass, and heat map
• N99xxB models require external mixer
Polar antenna pattern with
compass
Boresight scan
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LT E F D D E X A M P L E : V E R I Z O N & AT T
CC1 CC2
CC0
Cell ID
210-0-70
CC3 CC4Cell ID
319-1-106
24
Sync
channel
The following signals are
transmitted in the downlink to
facilitate cell search:
- the primary, secondary and
extended synchronization
signals.
- Data can be tagged with GPS
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C O V E R A G E A N D B A N D C L E A R I N G
• Channel Power vs
location
• Channel power vs time
• Data logging (csv and
KML)
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Challenges for testing 5G networks:
• Link budget verification to guide RF planning for 28 GHz, 39GHz, etc
• Quantify the effectiveness of massive MIMO and beamforming;
• Antenna test over the air
Key measurements
• Antenna system and its coverage with beamforming and massive MIMO;
• Uplink, downlink signal verification
• User experience test
Use test tools that offer frequency coverage and function to address the challenges of 5G network deployment and field troubleshooting
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Better Spectral Efficiency
•Clever modulation & coding schemes
Cell Densification
•Add more base stations
Use more spectrum
𝐶 = 𝐵𝑊 𝐿𝑂𝐺2 1 +𝑆
𝑁Ultra-Reliable Low Latency
Communications
Enhanced Mobile Broadband
Massive Machine Type
CommunicationsFigure 1: Source ITU 5G Recommendations 9/2015
A N D W AY S T O A C H I E V E H I G H T H R O U G H P U T
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H I G H E R T H R O U G H P U T V I A H I G H E R O R D E R M O D U L AT I O N
?Q
I
QPSK
2 bits / symbol
Q
I
64QAM
6 bits / symbol 12 bits / symbol
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H I G H E R T H R O U G H P U T V I A H I G H E R O R D E R M O D U L AT I O N – T H E C H A L L E N G E
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H I G H E R F R E Q U E N C I E S F O R H I G H E R D ATA R AT E S
*Gigabit LTE and beyond: Mobilizing millimeter wave
21.1 GHz of new unlicensed spectrum
1 6 20 30 40 50 60 70-80 116-123 174.8-182 185-190 244-246
Current
IMT
Bands
24 GHz
Licensed
LMDS
Licensed
40 GHZ
Licensed50 GHz
Licensed
60 GHz
Licensed
70-80 GHz
Licensed116-123 GHz
Unlicensed
174.5-182 GHz
Unlicensed185-190 GHz
Unlicensed
244-246 GHz
Unlicensed
95
10 yr Experimental license use on any frequencies between (95 GHz – 3 THz)
7.2
5 -
7.7
5
8.5
–10.5
5
24.2
5 -
27.5
7.9
–8
.41
0.7
–1
2.7
5
13
.75
–1
4.5
18 -
21
24 –
26
.5
28 -
31
36 -
40
13.4
-14
15.7
–17.7
24
.05
–2
4.2
5
33.4
-36
43.4
-44.5
59 -
64
76 -
81
92 -
100
26.5
-29.5
37 -
38.6
38.6
-40
40.5
-43.5
47.2
-50.2
45.5
-47.5
50.4
-52.6
64 -
71
81 -
86
GHz
27.5
-28.3
5
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H I G H E R T H R O U G H P U T V I A W I D E R B A N D W I D T H S – T H E C H A L L E N G E
2 GHz BW
3 dB SNR decrease
Frequency
Amplitude
LTE (20 MHz BW) compared to 5G (2 GHz BW): SNR delta = 20
dB!
1 GHz BW
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I N C R E A S E D S Y S T E M N O I S E
• Wideband noise will often limit
device & measurement performance
• Any back-off needed to prevent signal
compression makes the problem
worse
Ou
tpu
t P
ow
er
Input Power
Noise with 2 GHz
bandwidth Signals
Noise with 100 MHz
bandwidth Signals
1 dB compression point
Operating range
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C H A L L E N G E S
Key Test Equipment Attributes
High power Low noise floorMulti-channel measurement
capability
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3 G P P C O N F O R M A N C E R E A D Y – H I G H P E R F O R M A N C E
N9040B & N9041BVXG44 GHz Dual Ch. Source
UXR110 GHz Oscilloscope
UXA110 GHz Signal Analyzer
DC Power Analyzer
Device Under TestCross-polarized 28 GHz phased arrayTest Signal
2x2 MIMO at 28 GHzKey Features
• 44 GHz Signal Creation / 110 GHz Analysis
• Multi-channel
• High Output Power
• 2 GHz signal Creation BW
• 110 GHz BW Demodulation Analysis
• Swept-tuned measurements to 110 GHz
• Import S-Parameters to de-embed test fixture
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N O W Y O U C A N : A C H I E V E S U B 1 0 G H Z N O I S E L E V E L S AT 7 0 G H Z S P E E D S
Z-Series UXR
UXR has >8 dB/Hz better noise density50 Ω Terminated 50 Ω Terminated
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• 1 There are many different ways to maximise data throughput in a 5G system
• 2 Each method comes with its own set of challenges and each challenge presents as a
measurement system requirement
• 3 Keysight has the test equipment that has been used across the world by different technology
companies to solve those challenges.
S U M M A R Y
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1. 5G is a broad aspirational communication unification system – not just a mobile phone
technology
2. There will be “evolutions” within 5G, just as there were in 4G, but probably more profound.
3. Many of the applications for 5G, at its best, still don’t exist.
4. Significant challenges still exist to get the fundamental technology right and working, and
millimetre wave FR2 is still a challenge yet to be proven.
S U M M A R Y