1. Submission doc.: IEEE 802.11-16/0366r0 March 2016 Takenori Sakamoto, Panasonic CorporationSlide 1 Experimental Measurement of USR Date: 2016-03-15 Authors:

2. Submission doc.: IEEE 802.11-16/0366r0 March 2016 Takenori Sakamoto, Panasonic CorporationSlide 2 Abstract The IEEE 802.11ay group proposed the Ultra Short Range (USR) communication as one of the use cases[1]. In this presentation, we considered the communication between the ticket gate and the smart phone as an example of USR scenario and measured the channel characteristics. The purpose of this presentation is a contribution toward developing a model of USR scenario in Channel Model Document[2]. Video/audio clip, magazine, newspaper, etc. Train Station

3. Submission doc.: IEEE 802.11-16/0366r0 Measurement Methodology 2-port network analyzer in 56.28~66.84GHz was used. In the experiments, 7.43dBi antenna were used as Tx and Rx antennas. To confirm the effect of reflection, metal or non-metal plates were attached to Tx antenna and Rx antenna. Metal plate : to get basic characteristics Non-metal plate : actual product The S-parameters (S21) were measured by changing Rx antenna position. March 2016 Takenori Sakamoto, Panasonic CorporationSlide 3

4. Submission doc.: IEEE 802.11-16/0366r0 Measurement Setup March 2016 Takenori Sakamoto, Panasonic CorporationSlide 4 Tx/Rx Antenna Plate Rx (Smart Phone) Rx (Smart Phone) Tx (Ticket gate) Tx (Ticket gate) Plastic stay Styrofoam stand Styrofoam stand X,Y,Z axis and Measuring Position

5. Submission doc.: IEEE 802.11-16/0366r0 Plate Size and Antenna Position March 2016 Takenori Sakamoto, Panasonic CorporationSlide 5 Thickness : 2mm (There are holes in front of the antennas.)

6. Submission doc.: IEEE 802.11-16/0366r0 Antenna Specification Type : Horn Gain (Directivity) : 7.43dBi 3dB beam width (E-plane) : 133.3deg. 3dB beam width (H-plane) : 83.2deg. March 2016 Takenori Sakamoto, Panasonic CorporationSlide 6

7. Submission doc.: IEEE 802.11-16/0366r0 Measurement Conditions ItemValue Tx power6dBm FrequencyCenter61.56GHz Span10.56GHz (4 channel bandwidth) Step20.625MHz (=10.56GHz/512) AntennaTypeHorn Gain7.43dBi HPBW133.3deg.(E), 83.2deg.(V) Aperture size5.12mm PolarizationVertical polarization for both Tx antenna and Rx antenna Measurement rangeX:10cm (fixed), Y:-15cm~15cm, Z:-30cm~30cm Measurement step1cm Material of plate (Tx, Rx)Metal (Aluminum, Aluminum) non-Metal (Acrylic, Polycarbonate) March 2016 Takenori Sakamoto, Panasonic CorporationSlide 7

8. Submission doc.: IEEE 802.11-16/0366r0 Measured Received Power Distribution When the metal plates are attached, the received power distributes in the form of the metal plate of the smart phone. When the non-metal plates are attached, the distribution is concentric. March 2016 Takenori Sakamoto, Panasonic CorporationSlide 8 Smart Phone

9. Submission doc.: IEEE 802.11-16/0366r0 1D Distribution of Measured Received Power March 2016 Takenori Sakamoto, Panasonic CorporationSlide 9 Horizontal Vertical Horizontal Vertical

10. Submission doc.: IEEE 802.11-16/0366r0 Measured Power Delay Profile March 2016 Takenori Sakamoto, Panasonic CorporationSlide 10 The first peak of the profile is the direct ray. When the metal plates are attached, there are several peaks at nearly equal interval of about 0.7ns after the first peak. These peaks are multiple reflected rays. The multiple reflected rays show the drastic decrease at the time of about 5ns, because 7 th multiple reflected ray does not reflect from the metal plate due to its limited size at 10cm distance. So, the number of the major multiple reflected rays depends on the communication distance and the plate size. When the non-metal plates are attached, since the rays penetrate the plate, there are few multiple reflected rays. Direct ray Multiple reflected rays 1 st 2 nd 3 rd 4 th 5 th 6 th 7 th 0.7ns RayDelay[nsec]Power[dB] Direct0.3788-3.5009 1 st reflected1.0417-9.1477 2 nd reflected1.7045-13.2079 3 rd reflected2.3674-16.915 4 th reflected3.0303-21.7173 5 th reflected3.7879-22.2328 6 th reflected4.4508-27.925 7 th reflected5.1136-36.931

11. Submission doc.: IEEE 802.11-16/0366r0 X=10cm, Y=0cm, Z=0cm Measured Power Delay Profile (Cont’d) March 2016 Takenori Sakamoto, Panasonic CorporationSlide 11 Direct 1 st multiple reflected 2 nd multiple reflected Metal plate non-Metal plate Free space path loss RayDirect1 st 2 nd 3 rd 4 th Attenuation[dB]2.2743-0.38663.03377.29188.9473 Attenuation relative to free space path loss Because the plates have a hole at the antenna position, maybe reflection coefficient is smaller than metal plate.

12. Submission doc.: IEEE 802.11-16/0366r0 X=10cm, Y=5cm, Z=0cm Measured Power Delay Profile (Cont’d) March 2016 Takenori Sakamoto, Panasonic CorporationSlide 12 reflect from metal plates reflect from plastic stay and metal plate RayDirect1 st 2 nd 3 rd Attenuation[dB]6.05963.913210.724114.6676 Attenuation relative to free space path loss

13. Submission doc.: IEEE 802.11-16/0366r0 Measured Power Delay Profile (Cont’d) X=10cm, Y=0cm, Z=5cm March 2016 Takenori Sakamoto, Panasonic CorporationSlide 13 reflect from metal plates RayDirect1 st 2 nd 3 rd 4 th 5 th 6 th Attenuation[dB]5.85050.22432.1969-0.94681.871312.349713.4053 Attenuation relative to free space path loss reflect from antenna and metal plates

14. Submission doc.: IEEE 802.11-16/0366r0 Measured Power Delay Profile (Cont’d) X=10cm, Y=0cm, Z=-5cm March 2016 Takenori Sakamoto, Panasonic CorporationSlide 14 reflect from plastic stay and metal plate RayDirect1 st 2 nd Attenuation[dB]5.49919.355319.3022 Attenuation relative to free space path loss

15. Submission doc.: IEEE 802.11-16/0366r0 Channel Frequency Response Frequency selective fading is observed, when the metal plates are attached. Depending on the position of the receiver, the fading can be deep. March 2016 Takenori Sakamoto, Panasonic CorporationSlide 15

16. Submission doc.: IEEE 802.11-16/0366r0 RMS Delay Spread Distribution The delay spread distribute concentrically. Due to the multiple reflected rays between the metal plates, relatively long delay spreads were observed. March 2016 Takenori Sakamoto, Panasonic CorporationSlide 16 Relatively long delay spread

17. Submission doc.: IEEE 802.11-16/0366r0 CDF for RMS Delay Spread Delay Spread 0.34ns~1.4ns (Metal plate) 0.23ns~0.91ns (Non-Metal plate) March 2016 Takenori Sakamoto, Panasonic CorporationSlide 17

18. Submission doc.: IEEE 802.11-16/0366r0 Peak to Total Power Ratio (PTPR) Distribution March 2016 Takenori Sakamoto, Panasonic CorporationSlide 18 Small PTPR PTPR = 10×log(P peak /P total ) The PTPR distributes concentrically. When the metal plates were attached, due to the multiple reflected rays, low PTPR was observed.

19. Submission doc.: IEEE 802.11-16/0366r0 CDF for PTPR PTPR -20.8dB~-0.14dB (Metal plate) -11.5dB~-0.10dB (non-Metal plate) The difference of minimum PTPR is about 9dB. March 2016 Takenori Sakamoto, Panasonic CorporationSlide 19

20. Submission doc.: IEEE 802.11-16/0366r0 March 2016 Takenori Sakamoto, Panasonic CorporationSlide 20 Conclusion This work presents the experimental measurement results of USR communication with wide HPBW antenna. To confirm the effect of reflection between the bodies of the ticket gate and the smart phone, metal and non- metal plates were attached to Tx antenna and Rx antenna. The delay spread is very short for both metal plate attached antenna and non-metal plate attached antenna. Theses results of this work should be reflected in USR channel modeling.

21. Submission doc.: IEEE 802.11-16/0366r0 March 2016 Takenori Sakamoto, Panasonic CorporationSlide 21 References [1] 11-15-0625-03-00ay-ieee-802-11-tgay-usage-scenarios.pptx [2] 11-15-1150-02-00ay-channel-models-for-ieee-802-11ay.docx