1. doc.: IEEE 802.11-10/0372r0 Submission March, 2010 Hirokazu Sawada, Tohoku UniversitySlide 1 [Intra-cluster response model and parameter for the enterprise cubicle environments at 60GHz] Date: 2010-3-17 Authors:

2. doc.: IEEE 802.11-10/0372r0 Submission Abstract This paper gives intra-cluster channel models for cubicle environments defined by TGad Two intra-cluster channel models for STA locations, NEAR and FAR in cubicle environments are developed (Vertical polarization with 30 degree HPBW antenna for STA and circular polarization with 90 degree HPBW antenna for AP) Major difference between near and far location channel model is decay factor Maximum delay spread of 2.2ns is observed when STA is under the AP The intra-cluster channel models proposed in this paper will be integrated with the inter-cluster channel models given by doc. 09/334r7 by Alexander March, 2010 Hirokazu Sawada, Tohoku UniversitySlide 2

3. doc.: IEEE 802.11-10/0372r0 Submission Current status of TGad channel modeling March, 2010 Hirokazu Sawada, Tohoku UniversitySlide 3 EnvironmentConferenceLivingCubicle Inter-cluster modelDone Doc. 09/334r7 Done Doc. 09/334r7 Done Doc. 09/334r7 Intra-cluster modelDone Doc.09/334r7 Doc.10/112r3 Done Doc.10/112r3 This work Doc.10/360 TGad channel modeling will be completed with this work

4. doc.: IEEE 802.11-10/0372r0 Submission Measurement system for cubicle environments Instrument: Vector network analyzer Hirokazu Sawada, Tohoku UniversitySlide 4 March, 2010 Network Analyzer Tx antenna is near the ceiling(AP) Rx antenna is on the desktop(STA)

5. doc.: IEEE 802.11-10/0372r0 Submission Measurement set up ParameterValue Center frequency62.5 GHz Band width3 GHz Number of frequency points801 Frequency step3.75 MHz Antenna typeConical horn HPBW of antenna30degree(STA), 90 degree(AP) PolarizationVertical(STA), Circular(AP) CalibrationDirect port connection without antennas Hirokazu Sawada, Tohoku UniversitySlide 5 March, 2010

6. doc.: IEEE 802.11-10/0372r0 SubmissionSlide 6Hirokazu Sawada, Tohoku University March, 2010 Desk 160×70 STA Floor plan of cubicle environments AP height:2.5m STA height:0.7m from floor Impulse responses are measured at the left, center, right positions on desktop STA Near location Far location

7. doc.: IEEE 802.11-10/0372r0 Submission Circular polarization is adopted for AP antenna Slide 7 RotationE E C Pol. AP antenna Vertical polarization is adopted for STA (“Polarization mismatch”: avoided by this – Linear TX antenna to linear RX antenna may cause much larger mismatch by PC /STA rotation) Hirokazu Sawada, Tohoku University March, 2010

8. doc.: IEEE 802.11-10/0372r0 Submission Measurement snapshots AP-STA Link Tx Rx Inside of a cubicle Rx antenna direction is aligned to Tx antenna direction in the measurement Hirokazu Sawada, Tohoku UniversitySlide 8 March, 2010

9. doc.: IEEE 802.11-10/0372r0 Submission Direct and reflection wave paths in cubicle environments March, 2010 Hirokazu Sawada, Tohoku UniversitySlide 9 Far locationNear location Left Center Right Rx position Rx positions: three on desktop (left, center, right) for each Direct wave attenuated by partition in far location (3-4 dB) Multiple-time-reflected waves on desktop Direct wave Reflection wave Left Center Right Rx position Tx

10. doc.: IEEE 802.11-10/0372r0 Submission Impulse responses of AP-STA (AP antenna HPBW:90deg, C pol., STA antenna HPBW:30deg, V pol.) March, 2010 Hirokazu Sawada, Tohoku UniversitySlide 10 Far location scenario Near location scenario Direct wave and reflection waves creating a single cluster were observed in the both scenarios Direct wave Reflection waves Rapid decay Reflection waves Slow decay Direct wave

11. doc.: IEEE 802.11-10/0372r0 Submission Delay spread for each scenario March, 2010 Hirokazu Sawada, Tohoku UniversitySlide 11 Largest delay spread of maximum 2.2ns: observed when STA is under the AP Near locationFar location Rx positionLeftCenterRightLeftCenterRight Delay spread [ns]0.561.342.161.031.420.90 Averaged [ns]1.351.12

12. doc.: IEEE 802.11-10/0372r0 Submission Intra-cluster parameters for cubicle environments March, 2010 Hirokazu Sawada, Tohoku UniversitySlide 12 Environments k f [dB] k b [dB]  f [ns -1 ]  b [ns -1 ] f [ns -1 ] b [ns -1 ] Distribution, for forward Distribution for backward Cubicle AP-STA Near location N/A24.5N/A0.690N/A1.13N/A Rayleigh Far location N/A22.5N/A14N/A0.81 N/ARayleigh t = 0 Time of arrival kb k f Central ray of intra-cluster Arrival rate, b Arrival rate, f Ray decay factor,  b Ray decay factor,  f Rayleigh distribution Tx antenna (AP) HPBW: 90deg C pol. Rx antenna (STA) HPBW: 30deg V pol. The major difference: decay factor

13. doc.: IEEE 802.11-10/0372r0 Submission Conclusion Two intra-cluster channel models for enterprise cubicle environments for Near and Far Locations have been proposed (Circular polarization with 90 degree HPBW antenna for AP and vertical polarization with 30 degree HPBW antenna for STA ) Major difference between near and far location is decay factor Ready to merge with inter-cluster channel models March, 2010 Hirokazu Sawada, Tohoku UniversitySlide 13