5g mmwave turn visions into test solutions reality. · challenges: 5g mmwave system solution:...

R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG

Trade names are trademarks of the owners

PD 3606.8620.32 | Version 01.00 | March 2017 (md)

Measuring new 5G mmWave systems

Data without tolerance limits is not binding | Subject to change

© 2017 Rohde & Schwarz GmbH & Co. KG | 81671 Munich, Germany

Rohde & SchwarzThe Rohde & Schwarz electronics group offers innovative solutions in the following business fields: test and measurement, broadcast and media, secure communications, cybersecurity, monitoring and network testing. Founded more than 80 years ago, the independent company which is headquartered in Munich, Germany, has an extensive sales and service network with locations in more than 70 countries.

Sustainable product design ❙ Environmental compatibility and eco-footprint ❙ Energy efficiency and low emissions ❙ Longevity and optimized total cost of ownership

Regional contact ❙ Europe, Africa, Middle East | +49 89 4129 12345 [email protected]

❙ North America | 1 888 TEST RSA (1 888 837 87 72) [email protected]

❙ Latin America | +1 410 910 79 88 [email protected]

❙ Asia Pacific | +65 65 13 04 88 [email protected]

❙ China | +86 800 810 82 28 | +86 400 650 58 96 [email protected]

Rohde & Schwarz GmbH & Co. KGwww.rohde-schwarz.com

Rohde & Schwarz trainingwww.training.rohde-schwarz.com

Be ahead in 5G.Turn visions into reality.

www.rohde-schwarz.com/5G

5G mmWavetest solutions

20937_003_5G_mmWave_Flyer_3606-8620-32_V0100_170310.indd 3 10.03.17 14:40

Challenges: 5G mmWave system

Solution: mmWave transceivers with hybrid beamforming architecture

●●●

●●●

TRx 1 PA 1

●●●Analog beamformer N

TRx N PA NMIM

O en

code

r

Digi

tal b

eam

form

ing

enco

der

●●●

N transceivers < M antennas

●●●

Ant 1

Ant p

Ant q

Ant M

Analog beamformer 1

28 GHz path loss High-Cost versus high-loss PAs

Input power in dBm

Effic

ienc

y in

%

28 GHz exotic materials PA

28 GHz CMOS PA

35

25

15

5

5 15 25 35

Distance from base station

Free space Indoorline of sight

Urban area

1 m

10 m

100 m

1000 m

–52 dB –92 dB

–69 dB –122 dB

–86 dB –151 dB

–103 dB –181 dB

–61 dB

–81 dB

–101 dB

–121 dB

5G test challenge: Measuring new 5G mmWave systems

5G mmWave challenges and solutions


Service that adds value❙ Worldwide❙ Local and personalized❙ Customized and flexible❙ Uncompromising quality❙ Long-term dependability

mmWave components

High frequencies = high demandsHigher frequency bands in the mmWave range also place high demands on the components used in 5G communi-cations devices and systems, e.g. filters, mixers, amplifiers and antennas. Measurement systems for efficient and reliable characterization of these components need to address several challenges in order to ensure wide frequency coverage, high dynamic range, high output power, signal stability and signal quality with as little distortion and harmonic content as possible.mmWave components

1.94 Å

1.95

Å

Exotic materials required for mmWave components

Theory versus reality5G waveforms generally use an OFDM waveform combined with filters to reduce out-of-band (OOB) emissions. Non-linear devices such as power amplifiers in a radio transceiver create “spectral regrowth” in the OOB region, thereby reducing the benefits of new 5G waveforms. Therefore end-to-end testing is required for both component and system optimization.

Signal/transceiver measurements

Signal/transceiver measurements

OFDMFBMCUFMCGFDM

∆=2-3 dB-45 dBm

-47 dBm

-70 dBm

-90 dBm∆=20 dB

Ideal system Practical system with non-linear amplifier

Channel modeling

Angle and direction of arrivalThough direct line of sight (LOS) can provide the best data link, most use cases will be non line of sight (NLOS), necessitating the use of both MIMO and beamforming. The achievable capacity of a mmWave cellular system using MIMO depends on the availability of parallel propagation paths. Therefore, it is important to be able to characterize not only the time-varying channel statistics, but also the directional propagation characteristics.

Channel modeling

MSSCAT.area

RMSNS

RS

RMAXRMIN

BS

Beam-tracking, blocking and acquisitionDue to the high path loss and limited range of a mmWave wireless system, precise beam-tracking and fast beam-acquisition is needed for mobile users. Slow beam acquisition will lead to user churn and slow the adoption of mmWave systems for outdoor usage. Whereas previous antenna pattern measurement systems required static beam patterns, future mmWave systems will require dynamic beam measurement systems.Beamsteering and beamtracking

Scattering or blocking

UE position 1

Base stationrangemmWave

base station

UE position 2

UE position 3

Beam-steering and beam-tracking

At Rohde & Schwarz, your test and measurement challenges are our motivation to provide solutions for your success: from mmWave signals to massive MIMO and other enabling technologies for 5G development and deployment.


Beamforming and beam-tracking

Rohde & Schwarz offers a cost-efficient OTA power mea-surement solution that measures the magnitude (power) from the radiating device under test such as a mmWave access point or device. The OTA power probe is anintegrated antenna plus power sensor so a digital signal is transmitted from the probe to the power meter (to pre-vent high attenuation of power at mmWave frequencies inside the coaxial cable). This system is designed for

all mmWave systems from 27.5 GHz to 75 GHz, allowing engineers to perform real-time beam-steering, beam-tracking, and beam-acquisition measurements. This system can be used in conjunction with an OTA performance test system (R&S®TS8991) for 3D radia-tion pattern measurements or with the R&S®TS7124 RF shielded box for in-situ measurements for production or rapid prototyping.

WIDEBAND ULTRA-LOW EVM & ULTRA-FLAT SIGNALSmmWave signal generation and analysis poses a new set of problems due to the smaller wavelengths, mmWAVE COMPONENT MEASUREMENTS UP TO 110 GHz

I/Q Modulation FrequencyResponse

EVM < 1% across 10 dB sweep at28 GHz

Customized Solution for 5GmmWave available

Based on 3GPP & Verizon TestSpecifications

LAN

OTA power sensor(up to 6)

R&S®NRPM

R&S®TS7124

DUT

DC, CTRL, LO, IF

Control PC

Baseband module

RF module

USB

Testantenna

RF

Beamforming and beam tracking

mmWave signal characterization

mmWave signal generation and analysis poses a new set of challenges due to the shorter wavelengths, for example spurious emissions resulting from multiplier harmonics and mixers. This makes it difficult to achieve low EVMs in the signal analyzer and flatness in the signal generator for large bandwidths (up to 2 GHz in signal bandwidth). The R&S®FSW85 has an ultra-low EVM and the R&S®SMW200A a flatness less than 0.4

dB across the entire 2 GHz signal bandwidth. Combined with the R&S®FS-K96 OFDM signal analysis software, OFDM-based signals and 5G waveform candidates, the R&S®FSW85 is the optimal tool for both sub-6 GHz and mmWave R&D. Additionally using the R&S®FSW-K18 provides a throughput power amplifier characterization test solution for both CW and modulated signals.

5 GHz

15 GHz

18 GHz

28 GHz

35 GHz

-1000 -800 -600 -400 -200 0 200 400 600 800 1000

Offset frequency in MHz

Freq

uenc

y re

spon

se in

dB

1.0

0.8

0.6

0.4

0.2

0

–0.2

–0.4

–0.6

–0.8

–1.0

0 1 2–1–2

EVM < 1% across 10 dB sweep at 28 GHzI/Q modulation frequency response

¸SMW200A¸FSW

OTA or conductiveinterfaceDUT

Up to 2 GHzbandwidth

2 Hz to 85 GHz

Ultra-low EVM

100 kHz to 40 GHz

Internal BW = 2 GHz

1 to 2 RF channels

Additional channels

Customized solution availablefor 5G mmWave

Based on 3GPP and Verizon test specifications

Wideband flatness andlow EVM

OTA or conductiveinterface

mmWave signal characterization


¸ZVA-Z110E¸ZVA Vector network analyzer

Calibrationplane

Only used forsource power calibration

Via USB

Receive side

LORF input

DUT

RF referenceRF measurement

RF inputRF reference

RF measurement

mmWave component characterization (S-parameters)

Rohde & Schwarz millimeter wave setup for frequencies up to 110 GHz

mmWave component characterization (S-parameters)

The R&S®ZVA vector network analyzer family is an ideal choice for demanding measurements in the lab as well as in production – from filter measurements requiring maximum dynamic range to linear and non- linear measurements on amplifiers and mixers as well as on receivers and transceivers. The analyzer features easy operation and high measurement speed with

a wide scope of functions and high flexibility. With four internal (phase-coherent) sources up to 67 GHz, the four-port R&S®ZVA enables fast two-tone measure-ments on amplifiers and mixers – eliminating the need for external generators. Direct access to up to eight phase coherent receivers further facilitates phased antenna array measurements.

Channel sounding

The Rohde & Schwarz channel measurement system uses temporal MIMO in a SISO-type environment in order to measure the channel impulse response. A SISO system is less complicated with fewer instruments and more accurate measurements. Rohde & Schwarz can measure the channel impulse response using only an

R&S®SMW200A signal generator and an up to 85 GHz R&S®FSW85 spectrum analyzer (the angle of arrival can be calculated using additional software and hardware). This system has been used by operators, universities and research institutes for modeling and planning future 5G mmWave networks.

I/Q data

¸SMW200ATransmitter

¸FSWReceiver

¸TS-5GCS

Delay t

|h|2

Radio channel

t0

Delay spread

Time t

Basic channel sounder setup Channel impulse response

Direction of arrival


Service that adds value❙ Worldwide ❙ Local and personalized❙ Customized and flexible❙ Uncompromising quality ❙ Long-term dependability

3606862032

R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG

Trade names are trademarks of the owners

PD 3606.8620.32 | Version 01.00 | March 2017 (md)

Measuring new 5G mmWave systems

Data without tolerance limits is not binding | Subject to change

© 2017 Rohde & Schwarz GmbH & Co. KG | 81671 Munich, Germany

Rohde & SchwarzThe Rohde & Schwarz electronics group offers innovative solutions in the following business fields: test and measurement, broadcast and media, secure communications, cybersecurity, monitoring and network testing. Founded more than 80 years ago, the independent company which is headquartered in Munich, Germany, has an extensive sales and service network with locations in more than 70 countries.

Sustainable product design ❙ Environmental compatibility and eco-footprint ❙ Energy efficiency and low emissions ❙ Longevity and optimized total cost of ownership

Certified Environmental Management

ISO 14001Certified Quality Management

ISO 9001

Regional contact ❙ Europe, Africa, Middle East | +49 89 4129 12345 [email protected]

❙ North America | 1 888 TEST RSA (1 888 837 87 72) [email protected]

❙ Latin America | +1 410 910 79 88 [email protected]

❙ Asia Pacific | +65 65 13 04 88 [email protected]

❙ China | +86 800 810 82 28 | +86 400 650 58 96 [email protected]

Rohde & Schwarz GmbH & Co. KGwww.rohde-schwarz.com

Rohde & Schwarz trainingwww.training.rohde-schwarz.com


5g mmwave turn visions into test solutions reality. · challenges: 5g mmwave system solution:...

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