a flexible testbed for 5g keysight technologies waveform generation & analysis€¦ · ·...
TRANSCRIPT
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© 2015 Keysight Technologies
Agenda
– Introduction
• 5G Research: Waveforms and Frequencies
• Desired Testbed Attributes and Proposed Approach
– Wireless Band Case Study
• FBMC and LTE Co-Existence
– Microwave Case Studies, 28 GHz
• FBMC
• Multi-Carrier OFDM
• Single-Carrier
– Millimeter-Wave Case Studies
• 60 GHz Upconverter: Single Carrier
• 72 GHz Upconverter / Downconverter: Single Carrier
A Flexible Testbed for 5G Waveform
Generation & Analysis 2
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© 2015 Keysight Technologies
5G Research Challenges
A Flexible Testbed for 5G Waveform
Generation & Analysis 3
• 1000X higher mobile data volume per geographical area
• 10 to 100X more connected devices
• 10 to 100X higher typical user data rate
• 10X lower energy consumption
• End-to-end latency of < 1ms
• Ubiquitous 5G access including in low density areas
Source: The 5G Infrastructure Public Private Partnership, details available at www.5g-ppp.eu/kpis/
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© 2015 Keysight Technologies
5G Enabling Devices >> Research Challenges
A Flexible Testbed for 5G Waveform
Generation & Analysis 4
Multi-band • Traditional cellular bands <6GHz
• WiFi, BT, GNSS bands
• 5G mmWave bands
Multi-antenna • Impedance matching
• Mutual coupling
• Multi-band, multi-RAT port
sharing
• FD / Massive MIMO
Amplifier • Envelope tracking
• Digital predistortion
• Wide, multi-bands
Multiple radio technologies • GSM/EDGE/WCDMA/HSPA/LTE
• WiFi/BT/WiGig/GNSS/5G
Advanced signal processing • Multiple MIMO modes and Hybrid Beamforming
• Network interference suppression
• Adaptive channel estimation / equalization
Full duplex communications • Self interference cancellation
• Dual polarization antenna
• Real time operation
New waveforms • Legacy OFDM enhancement
• FBMC, UFMC, GFDM
Multiple Access • Non-orthogonal multiple
access(NOMA,SCMA)
• Random / scheduled /
hybrid
Source: The 5G Infrastructure Public Private Partnership, details available at www.5g-ppp.eu/kpis/
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© 2015 Keysight Technologies
Waveform Design Considerations for 5G
A Flexible Testbed for 5G Waveform
Generation & Analysis 5
Bandwidth /
Frequency
Waveform
New RAT
Advanced Multi-Carrier Waveforms1
OFDM FBMC / OFDM / Others Single carrier
>> Wider bandwidths, higher frequencies
Note1: • Orthogonal Frequency Division Multiplexing(OFDM)
• Filter Bank Multicarrier(FBMC)
• Universal Filtered Multicarrier(UFMC)
• Generalized Frequency Division Multiplexing(GFDM)
• Frequency Quadrature Amplitude Modulation(FQAM)
OFDMA NOMA SCMA
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© 2015 Keysight Technologies
Waveform Requirements • Flexible and scalable
• Optimized multiple access
• Efficient usage of the allocated spectrum
• Robustness to narrowband jammers and impulse noise
• Low latency
• Simultaneous operation of synchronous and asynchronous traffic
• High spectral and temporal fragmentation
• Coexistence with legacy OFDM waveforms
A Flexible Testbed for 5G Waveform
Generation & Analysis 6
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© 2015 Keysight Technologies
Different Types of Waveforms and Filter Operations
A Flexible Testbed for 5G Waveform
Generation & Analysis 7
UFMC
per sub-band
OFDM
per full-band
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ FBMC
per sub-carrier
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© 2015 Keysight Technologies
OFDM
Advantages
– Good spectral efficiency
– Resistance against multipath interference
– Efficiently implemented using FFTs and IFFTs
– Subcarrier nulls correspond to peaks of
adjacent subcarriers for zero inter-carrier-
interference
Drawbacks
– Some loss of spectral efficiency due to Cyclic
Prefix insertion
– Imperfect synchronization cause loss of
orthogonality
– Large peak to average power ratio (PAR)
– High out-of-band power
– Subcarrier intermodulation must be reduced
A Flexible Testbed for 5G Waveform
Generation & Analysis 8
frequency
f1 f2
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© 2015 Keysight Technologies
Filterbank Multicarrier (FBMC) vs. OFDM
A Flexible Testbed for 5G Waveform
Generation & Analysis 9
IFF
T
P
/
S
S
/
P
FF
T
Sym
bo
l
ma
ppin
g
Sub-c
arr
ier
ma
ppin
g
Sub-c
arr
ier
de
-ma
ppin
g
Sym
bo
l
de
-ma
ppin
g
OFDM baseband signal processing blocks
OQ
AM
pre
pro
ce
ssin
g
IFF
T
Po
ly P
ha
se
Ne
two
rk
P
/
S
S
/
P
Po
ly P
ha
se
Ne
two
rk
FF
T
OQ
AM
post pro
cessin
g
Synthesis Filter bank Analysis Filter bank
Sym
bo
l
ma
ppin
g
Sub-c
arr
ier
ma
ppin
g
Sub-c
arr
ier
de
-ma
ppin
g
Sym
bo
l
de
-ma
ppin
g
FBMC baseband signal processing blocks
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© 2015 Keysight Technologies
𝑋(𝑡) =
𝑛
𝑘
𝑆𝑘 𝑛 𝑃 𝑡 − 𝑛𝑇 𝑒 𝑗2𝜋𝑘(𝑡 − 𝑛𝑇)/T
OFDM and FBMC Transmit Signal Equation for Filtered OFDM
𝑃 𝑡 = 𝛱(𝑡−𝑇/2
𝑇) ∗ ℎ 𝑡
𝑋(𝑡) =
Transmit Signal Equation for FBMC
𝑛
𝑘
𝑆𝑘 𝑛 𝑃𝑘 𝑡 − 𝑛𝑇/2
𝑗𝜋𝑘𝑡/𝑇 𝑃𝑘 𝑡 = 𝑝 𝑡 𝑒 𝑒
𝑗 𝑘 + 𝑛 𝜋/2
x
+ . . .
𝑆0
x 𝑆1
x 𝑆𝑁 − 1
𝑃𝑇 𝑡
𝑃𝑇 𝑡
𝑃𝑇 𝑡
.
.
.
𝑒 𝑗2𝜋𝑓0𝑡
𝑒 𝑗2𝜋𝑓1𝑡
𝑒 𝑗2𝜋𝑓𝑁 − 1𝑡
Unified Block Diagram of OFDM and FBMC
+
.
.
.
𝐼𝑆0(𝑡)
x
x
𝑃 𝑡
.
.
.
𝑒
+
𝑃 𝑡 −𝑇
2 𝑗𝑄𝑆0(𝑡)
𝐼𝑆1(𝑡) 𝑃 𝑡
+
𝑃 𝑡 −𝑇
2 𝑗𝑄𝑆1(𝑡)
𝐼𝑆𝑁 − 1(𝑡) 𝑃 𝑡
+
𝑃 𝑡 −𝑇
2 𝑗𝑄𝑆𝑁 − 1(𝑡)
𝑗(2𝜋𝑇𝑡 + 𝜋
2)
𝑒 𝑗(𝑁 − 1)(2𝜋
𝑇𝑡 + 𝜋
2)
Block Diagram of OQAM/FBMC
rais
ed
cosin
e
Impulse Response Frequency Response
han
/ham
/bm
ch
eb
ysh
ev
A Flexible Testbed for 5G Waveform
Generation & Analysis
For more information, please see the “How to Understand 5G:
Waveforms” video at www.keysight.com/find/eesof-how-to-videos
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© 2015 Keysight Technologies
Filterbank Multicarrier (FBMC) vs. OFDM
A Flexible Testbed for 5G Waveform
Generation & Analysis 11
FBMC filtering can have different K factors, or filter overlap factors, which provide varying levels of out-of-
band spectral rejection
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© 2015 Keysight Technologies
UFMC - Universal Filtered Multi-Carrier
A Flexible Testbed for 5G Waveform
Generation & Analysis 12
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© 2015 Keysight Technologies
Desired Attributes of a Flexible Testbed
A Flexible Testbed for 5G Waveform
Generation & Analysis 13
• Generating and analyzing new waveforms
• Supporting a wide range of modulation bandwidths, from several MHz to a
few GHz
• Supporting a wide range of frequency bands, from RF to microwave to
millimeter-wave
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© 2015 Keysight Technologies
A Flexible Testbed for 5G Waveform
Generation & Analysis 14
Flexible Waveform Generation: Software + AWG+ PSG
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© 2015 Keysight Technologies
Flexible Testbed for 5G Waveform Generation & Analysis
A Flexible Testbed for 5G Waveform
Generation & Analysis 15
*Note: Different test equipment configurations may be used
dependent on frequencies and bandwidths
63 GHz Infiniium
oscilloscope with 89600
VSA software
M8190A AWG
with SystemVue W1906 5G
Baseband Exploration
Library and N7608B Signal
Studio for Custom
Modulation software installed
on embedded controller
44 GHz E8267D PSG
vector signal generator
with wideband IQ inputs
Millimeter-wave
upconverters /
downconverters
N9040B UXA
signal analyzer
N5183B MXG microwave analog signal
generators for upconverter /
downconverter LO’s
VDI 60-90 GHz
Keysight 58-64 GHz
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© 2015 Keysight Technologies
– Introduction
• 5G Research: Waveforms and Frequencies
• Desired Testbed Attributes and Proposed Approach
– Wireless Band Case Study
• FBMC and LTE Co-Existence
– Microwave Case Studies, 28 GHz
• FBMC
• Multi-Carrier OFDM
• Single-Carrier
– Millimeter-Wave Case Studies
• 60 GHz Upconverter: Single-Carrier
• 72 GHz Upconverter / Downconverter: Single-Carrier
A Flexible Testbed for 5G Waveform
Generation & Analysis 16
Agenda
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© 2015 Keysight Technologies
FBMC Co-Existence with LTE Case Study Test Configuration
A Flexible Testbed for 5G Waveform
Generation & Analysis 17
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© 2015 Keysight Technologies
FBMC Co-Existence with LTE Case Study
A Flexible Testbed for 5G Waveform
Generation & Analysis 18
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© 2015 Keysight Technologies
FBMC Co-Existence with LTE Case Study
A Flexible Testbed for 5G Waveform
Generation & Analysis 19
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© 2015 Keysight Technologies
FBMC Co-Existence with LTE Case Study
A Flexible Testbed for 5G Waveform
Generation & Analysis 20
EVM = 0.6%
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© 2015 Keysight Technologies
FBMC Co-Existence with LTE Case Study (continued)
A Flexible Testbed for 5G Waveform
Generation & Analysis 21
LTE EVM vs. FBMC Spectrum Notch Width
LT
E E
VM
, %
FBMC Notch Width (# Subcarriers)
EVM= 0.6% EVM= 1.25 %
EVM= 2.1%
EVM= 20.1%
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© 2015 Keysight Technologies
– Introduction
• 5G Research: Waveforms and Frequencies
• Desired Testbed Attributes and Proposed Approach
– Wireless Band Case Study
• FBMC and LTE Co-Existence
– Microwave Case Studies, 28 GHz
• FBMC
• Multi-Carrier OFDM
• Single-Carrier
– Millimeter-Wave Case Studies
• 60 GHz Upconverter: Single-Carrier
• 72 GHz Upconverter / Downconverter: Single-Carrier
A Flexible Testbed for 5G Waveform
Generation & Analysis 22
Agenda
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© 2015 Keysight Technologies
Microwave Case Study Test Configuration
A Flexible Testbed for 5G Waveform
Generation & Analysis 23
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© 2015 Keysight Technologies
Simplify Signal Creation- Custom 5G
• Flexible solution supports early 5G wireless
research and development
• Create emerging 5G candidate waveforms,
such as filter bank multicarrier (FBMC):
- Configure custom FBMC
waveforms and set parameters
- Set FBMC filter settings such as filter
overlap factor (K) and filter bank structure
- Use Interactive filter editor to configure
FBMC filter coefficients
A Flexible Testbed for 5G Waveform
Generation & Analysis
N7608B Signal Studio for Custom Modulation
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© 2015 Keysight Technologies
Wideband FBMC- Configure Waveform Parameters
A Flexible Testbed for 5G Waveform
Generation & Analysis 25
Configure FBMC Waveform: • FFT length
• Guard Subcarriers
• Number of Symbols
• Idle Interval
• Initial / Final Transition Cutoff
• Sample Frequency
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© 2015 Keysight Technologies
Wideband FBMC- Configure Filter
A Flexible Testbed for 5G Waveform
Generation & Analysis 26
FBMC Filter Settings: • Set filter overlap factor (K)
• Set filter bank structure:
- Extended IFFT
- Polyphase network
FBMC Filter Editor: • View frequency response
• Import/export filter
coefficients from/to files
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© 2015 Keysight Technologies
Wideband FBMC- Configure Resource Mapping
A Flexible Testbed for 5G Waveform
Generation & Analysis 27
View Resource Mapping: • Data, pilot, preamble vs.
symbol
• Modulation vs. symbol
Set Resource Mapping: • Add/edit resource blocks
such as preambles, pilots,
and data
• Set on/off state, symbol
index, subcarrier index,
boost level, modulation
type, payload/ IQ values for
each resource block
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© 2015 Keysight Technologies
Wideband FBMC Waveform Generation
A Flexible Testbed for 5G Waveform
Generation & Analysis 28
M8190A
AWG
E8267D PSG
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Wideband FBMC- 2 GHz Wideband Modulation at 28 GHz Center Frequency
A Flexible Testbed for 5G Waveform
Generation & Analysis 29
2 GHz wide
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Wideband Multi-Carrier OFDM Waveform Generation at 28 GHz
A Flexible Testbed for 5G Waveform
Generation & Analysis 30
M8190A
AWG
E8267D PSG
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© 2015 Keysight Technologies
Wideband Multi-Carrier OFDM ~500 MHz Modulation at 28 GHz Center Frequency with Channel Equalization Enabled
A Flexible Testbed for 5G Waveform
Generation & Analysis 31
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© 2015 Keysight Technologies
Wideband Multi-Carrier OFDM ~1 GHz Modulation at 28 GHz Center Frequency with Channel Equalization Enabled
A Flexible Testbed for 5G Waveform
Generation & Analysis 32
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Wideband Single Carrier Waveform Generation at 28 GHz
A Flexible Testbed for 5G Waveform
Generation & Analysis 33
FIR filter to be used for corrections
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© 2015 Keysight Technologies
Wideband Single Carrier 500 MHz Wideband Modulation at 28 GHz Center Frequency with Adaptive Eq. Enabled
A Flexible Testbed for 5G Waveform
Generation & Analysis 34
Adaptive Equalizer
Complex Frequency
Response
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© 2015 Keysight Technologies
Apply Real and Imaginary to an FIR Filter
A Flexible Testbed for 5G Waveform
Generation & Analysis 35
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© 2015 Keysight Technologies
Wideband Single Carrier 500 MHz Wideband Modulation at 28 GHz Center Frequency After Corrections without Adaptive Eq.
A Flexible Testbed for 5G Waveform
Generation & Analysis 36
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© 2015 Keysight Technologies
Wideband Single Carrier- 1 GHz Wideband Modulation at 28 GHz Center Frequency After Corrections without Adaptive Equalization
A Flexible Testbed for 5G Waveform
Generation & Analysis 37
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© 2015 Keysight Technologies
Wideband EVM Considerations
A Flexible Testbed for 5G Waveform
Generation & Analysis 38
EVM Considerations:
• IQ Gain Imbalance
• IQ Skew
• Phase Noise
• Integrated Noise vs. Modulation Bandwidth
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© 2015 Keysight Technologies
– Introduction
• 5G Research: Waveforms and Frequencies
• Desired Testbed Attributes and Proposed Approach
– Wireless Band Case Study
• FBMC and LTE Co-Existence
– Microwave Case Studies, 28 GHz
• FBMC
• Multi-Carrier OFDM
• Single-Carrier
– Millimeter-Wave Case Studies
• 60 GHz Upconverter: Single-Carrier
• 72 GHz Upconverter / Downconverter: Single-Carrier
A Flexible Testbed for 5G Waveform
Generation & Analysis 39
Agenda
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© 2015 Keysight Technologies
60 GHz Case Study Test Setup- Upconverter Only
A Flexible Testbed for 5G Waveform
Generation & Analysis 40
Keysight N5152A
5 GHz / 60 GHz
Millimeter-wave
upconverter
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© 2015 Keysight Technologies
60 GHz Case Study Test Configuration
A Flexible Testbed for 5G Waveform
Generation & Analysis 41
LAN
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© 2015 Keysight Technologies
Wideband Single Carrier- 2 GHz Wideband Modulation at 60.48 GHz Center Frequency After Corrections without Adaptive Eq.
A Flexible Testbed for 5G Waveform
Generation & Analysis 42
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© 2015 Keysight Technologies
72 GHz Case Study Test Setup- Upconverter and Downconverter
A Flexible Testbed for 5G Waveform
Generation & Analysis 43
VDI 60-90 GHz
Millimeter-wave
upconverter
VDI 60-90 GHz
Millimeter-wave
downconverter
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© 2015 Keysight Technologies
72 GHz Case Study Test Configuration- Upconverter and Downconverter
A Flexible Testbed for 5G Waveform
Generation & Analysis 44
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© 2015 Keysight Technologies
Wideband Single Carrier- 2GHz Wideband Modulation at 4 GHz Downconverter Output After Corrections without Adaptive Eq. (7 GHz IF 72 GHz 4 GHz IF)
A Flexible Testbed for 5G Waveform
Generation & Analysis 45
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© 2015 Keysight Technologies
Waveform Design Considerations for 5G
A Flexible Testbed for 5G Waveform
Generation & Analysis 46
Bandwidth /
Frequency
Waveform
New RAT
Advanced Multi-Carrier Waveforms1
OFDM FBMC / OFDM / Others Single carrier
>> Wider bandwidths, higher frequencies
Note1: • Orthogonal Frequency Division Multiplexing(OFDM)
• Filter Bank Multicarrier(FBMC)
• Universal Filtered Multicarrier(UFMC)
• Generalized Frequency Division Multiplexing(GFDM)
• Frequency Quadrature Amplitude Modulation(FQAM)
OFDMA NOMA SCMA
Page
© 2015 Keysight Technologies
New Video: www.youtube.com/user/KeysightCellular
A Flexible Testbed for 5G Waveform
Generation & Analysis 47
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© 2015 Keysight Technologies
New Whitepaper- Download it from: www.keysight.com/find/5G-insight
A Flexible Testbed for 5G Waveform
Generation & Analysis 48
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© 2015 Keysight Technologies
Summary
• Demonstrated flexible testbed approach for 5G applications using off-the-shelf design
simulation and test equipment-- quickly evaluate “what-if” scenarios in the R&D lab
• Waveform flexibility is provided by software; flexibility in bandwidths and frequencies is
provided by hardware
• Case study to evaluate co-existence between FBMC and LTE
• Wideband waveform signal generation and analysis case studies at 28 GHz, 60 GHz, and 72
GHz
• Investigated vector corrections to improve waveform performance over wide modulation
bandwidths
A Flexible Testbed for 5G Waveform
Generation & Analysis 49
For more information, visit www.keysight.com/find/5G-insight