November 2017 doc.: 15-17-0588-00-0thz-multifrequency ......Tx azi-100-90-80 0 100 200 300 Rx...
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doc.: 15-17-0588-00-0thz-multifrequency_measurements November 2017 Project: IEEE P802.15 Working Group for Wireless Project: IEEE P802.15 Working Group for Wireless Speciality Speciality Networks Networks (WSNs WSNs) Project: IEEE P802.15 Working Group for Wireless Project: IEEE P802.15 Working Group for Wireless Speciality Speciality Networks Networks (WSNs WSNs) Submission Title: Multi-Frequency Measurements at 9, 64 and 304 GHz using an Ultra-Wideband Channel Sounder Date Submitted: 6 November 2017 Source: Thomas Kürner TU Braunschweig Address Schleinitzstr. 22, D-38092 Braunschweig, Germany Voice:+495313912416, FAX: +495313915192, E-Mail: [email protected] Re: / Re: n/a Abstract: The alignment of high gain antennas used for 300 GHz links is challenging in the device discovery phase. Brute-force scanning of the angle-of-arrival at the receiver and of the angle-of- departure at the transmitter is too time-consuming Therefore a two-step process can be applied which departure at the transmitter is too time-consuming. Therefore, a two-step process can be applied which appies a rough estimation of the angles at lower frequencies using lower-gain antennas. A pre-requisite to apply such a method are similarities of the channel at both carrier frequencies. This presentation provides a comparison of measured power angular spectra at carrier frequencies of 9, 64 and 304 GHz. Purpose: Information of the IG THz Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802 15 Submission Thomas Kürner (TU Braunschweig). Slide 1 IEEE and may be made publicly available by P802.15.
Transcript of November 2017 doc.: 15-17-0588-00-0thz-multifrequency ......Tx azi-100-90-80 0 100 200 300 Rx...
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doc.: 15-17-0588-00-0thz-multifrequency_measurementsNovember 2017
Project: IEEE P802.15 Working Group for WirelessProject: IEEE P802.15 Working Group for Wireless SpecialitySpeciality NetworksNetworks ((WSNsWSNs))Project: IEEE P802.15 Working Group for Wireless Project: IEEE P802.15 Working Group for Wireless SpecialitySpeciality Networks Networks ((WSNsWSNs))Submission Title: Multi-Frequency Measurements at 9, 64 and 304 GHz using an Ultra-Wideband Channel SounderDate Submitted: 6 November 2017Source: Thomas Kürner TU BraunschweigAddress Schleinitzstr. 22, D-38092 Braunschweig, GermanyVoice:+495313912416, FAX: +495313915192, E-Mail: [email protected]: /Re: n/aAbstract: The alignment of high gain antennas used for 300 GHz links is challenging in the devicediscovery phase. Brute-force scanning of the angle-of-arrival at the receiver and of the angle-of-departure at the transmitter is too time-consuming Therefore a two-step process can be applied whichdeparture at the transmitter is too time-consuming. Therefore, a two-step process can be applied whichappies a rough estimation of the angles at lower frequencies using lower-gain antennas. A pre-requisiteto apply such a method are similarities of the channel at both carrier frequencies. This presentationprovides a comparison of measured power angular spectra at carrier frequencies of 9, 64 and 304 GHz.Purpose: Information of the IG THzNotice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802 15
Submission Thomas Kürner (TU Braunschweig).Slide 1
IEEE and may be made publicly available by P802.15.
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doc.: 15-17-0588-00-0thz-multifrequency_measurementsNovember 2017
M lti F M t t 9 64Multi-Frequency Measurements at 9, 64 and 304 GHz using an Ultra-Wideband g
Channel Sounder
Thomas Kürner, Bile Peng, Ke Guan, Sebastian ReyTechnische Universität Braunschweig, Germany
Th h i d t ithi th j t iBROW (G t A t NThe research was carried out within the projects iBROW (Grant Agreement No.645369) supported by the EU Framework Programme for Research and InnovationHorizon 2020 and the project “Characterization and Modeling for the Millimeter andSub-Millimeter Wave MIMO Mobile Ultra-Broadband Channel enabling Smart Rail
Submission
Sub Millimeter Wave MIMO Mobile Ultra Broadband Channel enabling Smart RailMobility” supported by the Alexander-von-Humboldt-Foundation
Thomas Kürner, TU BraunschweigSlide 2
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Outline
• Motivation• Description the Channel Sounder and the
Measurement Scenario• Measurement Results• Comparison with Simulations derived fromComparison with Simulations derived from
Ray Launching• Conclusions• Conclusions
Submission Thomas Kürner, TU BraunschweigSlide 3
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Motivation• The alignment of high gain antennas used for 300 GHz links is
challenging especially in the device discovery phase during the set-upof the connectionof the connection.
• Brute-force scanning of the angle-of-arrival at the receiver and of theangle-of-departure at the transmitter is too time-consuming.Th f t t b li d h h• Therefore, a two-step process can be applied, where roughestimations of the angles are derived at lower frequencies withantennas having lower gains in the first step [1]. A i i l h h d i il i i f h h l• A pre-requisite to apply such a method are similarities of the channel atthe higher and lower frequencies.
• This presentation provides a comparison of measured spatial channelcharacteristics at carrier frequencies of 9 GHz, 64 GHz and 304 GHz using an ultra-wideband channel sounder [2].
• Aditionally the results are compared with simulated characteristics
Submission
using ray launching [3].
Thomas Kürner, TU BraunschweigSlide 4
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TUBS‘ Time-Domain Channel Sounder
TxRx
Tx
Base Unit
ControlLaptop
Submission Thomas Kürner, TU BraunschweigSlide 5
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T h i l P t f th Ch lNovember 2017
Technical Parameters of the Channel Sounder
Parameter ValueClock Frequency 9.22 GHz
Bandwidth ~ 8 GHzChip duration 108.5 ps
M sequence order 12M-sequence order 12Sequence length 4095Sequence duration 444.14 nsq
Subsampling factor 128Acquisition time for one CIR 56.9 µsMeasurement Rate 17 590 CIR/sMeasurement Rate 17,590 CIR/s
Center Frequencies 9.2 / 64.3 / 304.2 GHzSISO/MIMO up to 4x4
Submission Slide 6
p
Thomas Kürner, TU Braunschweig
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Set-Up for the three Bands
Sensor node with frequency extension and antenna
Double ridged horn antenna for 9 GHz
Horn antenna for 60 GHz Horn antenna for 300 GHz
Submission Thomas Kürner, TU BraunschweigSlide 7
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C lib ti ith B k t B kNovember 2017
Calibration with Back-to-Back Measurement
• A reference measurement (B2B measurement) is carried out for a calibration to compensate for the imperfection of RF frontend.
• In the B2B measurement, Tx and Rx are connected with a 50 dB attenuator.f f S• The calibration has significantly supressed the ”fake” signals and improved the SINR.
Submission
B2B Measurement (50 dB attenuator in between) LoS Measurement (Tx and Rx looking at each other)
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Measurement Scenario (Lecture Room)
Submission Slide 9 Thomas Kürner, TU Braunschweig
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T h i l P t f thNovember 2017
Techncial Parameters of theMeasurement Campaignp g
Parameter 9 GHz 60 GHz 300 GHzAzimuth HPBW 14° 10° 10°A t G i 10 dBi 15 dBi 15 dBiAntenna Gain 10 dBi 15 dBi 15 dBi
Scanning resolution
10° 10° 10°
Center Frequency
9.2 GHz 64.2 GHz 304.2 GHz
Bandwidth 8 GHz 8 GHz 8 GHzBandwidth 8 GHz 8 GHz 8 GHz
Submission Slide 10 Thomas Kürner, TU Braunschweig
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Measured Power Angular Spectra00
olar
izat
ion 0
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150uth
(°)
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izon
atlp
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zim
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ion
H
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350 -100
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350
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50 50
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350 -75
al p
olar
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uth
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imut
h (°
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uth
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ca
0 100 200 300Rx azimuth (°)
250
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T
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( ) ( )( )
Thomas Kürner, TU Braunschweig
60 GHz9 GHz 300 GHz
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Simulation Scenario
• Simulations have been performed using Ray Launching in a 3D model of the lecture room
Submission Slide 12 Thomas Kürner, TU Braunschweig
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Measured vs Simulated Power AngularMeasured vs. Simulated Power Angular Spectra at 60 GHz
0
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zim
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Rx azimuth (°)
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Measured, vertical polarization Measured, horizontal polarization0
-5050
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uth
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0 100 200 300R i th (°)
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Submission
Rx azimuth (°)
Simulated, horizontal polarization
Rx azimuth (°)
Simulated, vertical polarizationThomas Kürner, TU Braunschweig
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Measured vs Simulated Power AngularMeasured vs. Simulated Power Angular Spectra at 300 GHz
0 00
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h (°
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Measured, vertical polarization Measured, horizontal polarization
0 100 200 300Rx azimuth (°)
3500 100 200 300
Rx azimuth (°)
350
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150
imut
h (°
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imut
h (°
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200
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Tx a
zi
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0 100 200 300
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Tx a
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SubmissionSimulated, horizontal polarizationSimulated, vertical polarization
Thomas Kürner, TU Braunschweig
0 100 200 300Rx azimuth (°)
0 100 200 300Rx azimuth (°)
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Conclusion
• Visual inspection of measurements of angular power spectra at carrier frequencies of 9 64 and 304 GHzspectra at carrier frequencies of 9, 64 and 304 GHz in a lecture room has revealed reasonable agreementacross the freqeuncies.q
• This supports first findings from an earlier simulation-based study on the applicability of a two-stepy yapproach for the determination of the angles-of-arrival/angles-of-departure during device discovery
• Reasonable agrement is also achieved, whencomparing the maeasurements with simulatedangular power spectra in the same lecture room
Submission
angular power spectra in the same lecture room.Thomas Kürner, TU BraunschweigSlide 15
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References
[1] B. Peng, S. Priebe, and T. Kürner, “Fast Beam Searching Concept forIndoor Terahertz Communications,” in Proc. 8th European Conference on Antennas and Propagation (EUCAP), pp. 483–487, IEEE, 2014.
[2] S. Rey, J. Eckhardt,. Peng, K. Guan, T. Kürner, Channel Sounding Techniques for Applications in THz Communications, 2nd Workshop on q pp , pTHz Communications (THZCOM) at the 9th International Congress on Ultra Modern Telecommunications and Control Systems, 8 November 17, 5 pages.
[3] D. M. Rose, S. Rey and T. Kürner, "Differential 3D ray-launching usingarbitrary polygonal shapes in time-variant indoor scenarios," 2016 Global Symposium on Millimeter Waves (GSMM) & ESA Workshop on y p ( ) pMillimetre-Wave Technology and Applications, Espoo, 2016, 4 pages
Submission Thomas Kürner, TU BraunschweigSlide 16
