Project: IEEE P Working Group for Wireless Personal Area Network (WPAN)

Transcription

1 Project: IEEE P Working Group for Wireless Personal Area Network (WPAN) Submission Title: [Ray-Tracing Simulation of the NICT Channel Measurements] Date Submitted: [18 July 2006] Source: [K. Sayrafian, B. Neekzad, J. Perez, J. Baras] Company [National Institute of Standard and Technology, University of Maryland] Address [100 Bureau Drive, Stop 8920, Gaithersburg, MD 20899] Voice:[ ], Re: [Response to the TG3c channel model subgroup call for channel models] Abstract: [Ray-Tracing simulation of the NICT data for the 60 GHz Channel Model] Purpose: [Contribution to TG3c at the July 2006 meeting in San Diego, USA] Notice: This document has been prepared to assist the IEEE P 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 P Submission Slide 1

2 Objective To compare the results of the deterministic ray-tracing simulation with empirical measurement obtained by NICT (LOS & NLOS) To investigate the effectiveness of raytracing in creating channel realization for 60 GHz indoor environments Submission Slide 2

3 Wireless System Engineering (WiSE) Wireless System Engineering (WiSE) is a ray-tracing tool that has been developed and verified by Bell Laboratories. It provides the complex impulse response of the channel. We have used WiSE package to simulate the same indoor propagation environment that was experimentally done by NICT. Produced By: Kamran Sayrafian-Pour WiSE Sample Output Submission Slide 3

4 NICT Measurement (Residential, LOS) Room with NO FURNITURE LOS path between the TX and RX 3 large windows (plane glass) on two intersecting walls Wooden door, floor and ceiling Surface of a wall and ceiling are covered with wallpaper Submission Slide 4

5 TX Antennas used (Residential, LOS) 62.5GHz/60 horn Max. of gain: 10 dbi 62.5GHz/30 horn Max. of gain: 16 dbi 62.5GHz/15 horn Max. of gain: 22 dbi Submission Slide 5

6 Layout-Geometry (Residential, LOS) 0.48m Wall side Door (Width: 0.75m, Height: 2.12m) 1.925m RX 3m 1.785m TX 1.64m 0.965m Window #3 3.57m 1.48m 1.64m 1.12m 1.64m Window #1 Window #2 6.85m 0.97m Submission Slide 6

7 Layout-Geometry (Residential, LOS) 3D View of the Room Ceiling height: 2.47m Window Height: 2.11m TX & RX Height: 1.1m Polarization : Vertical Tx antenna: always fixed Rx antenna: rotated from 0 to 360 degree in 5 degree step Window #1 Window #2 Window # Submission Slide 7

8 Cluster Identification (LOS, TX:360, RX:15) Experiment 2D-KDE (NICT, Tx-360, Rx-15, Residential-LOS, -35 db Threshold) Simulation 2D-KDE (WiSE, Tx:360, Rx:15, Residential-LOS) D e l a y ( n s e c ) 40 D elay (nsec) Azimuth (Degrees) Azimuth (Degree) Submission Slide 8

9 Cluster Identification (LOS, TX:360, RX:15) Cluster # Approx. Cluster Arrival Angel (Deg) Approx. Cluster Arrival Time (nsec) Experiment Simulation ,7 160, ? Submission Slide 9

10 LOS & Single Reflection Clusters (Residential) doc.: IEEE c Cluster 2 Rx -50 Cluster 1 50 Tx Cluster Submission Slide 10

11 Double Reflection Clusters (Residential) Cluster 4 Rx Tx Cluster Submission Slide 11

12 Other Double Reflection Clusters (Residential) doc.: IEEE c Cluster Rx Tx Cluster Submission Slide 12

13 Reflection from the back wall, RX-Side (Residential) Rx Cluster 8 Tx Submission Slide 13

14 Reflection from the back wall, TX-Side (Residential) Rx Cluster 9 Tx Submission Slide 14

15 Sample Distribution of the Relative Angles of Arrival (Residential, LOS) Distribution of Relative Angles of Arrival for Simulated & Measured Channel (Residential, LOS, Tx:360, Rx:15) Simulation Experiment Percentage of Occurance Relative Arrival Angle (Degrees) Submission Slide 15

16 NICT Measurement (Office-NLOS) The office room is made of steel wall, steel ceiling and steel floor The floor and the ceiling are covered with carpet and plaster board, respectively Existing window on one side Submission Slide 16

17 Layout-Geometry (Office, NLOS) 4 m 6.25 m 4.25 m Meeting room 0.5 m Tx 3.5 m Desk 5 m Desk Desk 6 m 7 m 10 m Rx 3.5 m Desk Desk 7.2 m Desk 7.5 m 12.5 m 2 m Desk Desk Locker room Wall (22 m) 7.5 m 1.5 m Submission Slide 17

18 Layout-Geometry (Office, NLOS) 1.25 m 1.5 m 1.5 m 3.5 m Submission Slide 18

19 Cluster Identification (Experiment, NLOS, TX:360, RX:15) Experiment 2D-KDE (NICT, Tx-360, Rx-15, Office-NLOS, -35 db Threshold) Simulation 2D-KDE (WiSE, Tx:360, Rx:15, Office-NLOS) D e l a y ( n s e c ) 100 D elay (nsec) Azimuth (Degree) Azimuth (Degrees) Submission Slide 19

20 Cluster Identification (Experiment, NLOS, TX:30, RX:15) Experiment 2D-KDE (NICT, Tx:30, Rx:15, Office-NLOS) Simulation 2D-KDE (WiSE, Tx:30, Rx:15, NLOS) D elay (nsec) 100 D elay (nsec) Azimuth (Degrees) Azimuth (Degrees) Submission Slide 20

21 Conclusions For scatter-free environments and LOS scenarios ray-tracing seems to provide a good match for cluster location and intra-cluster statistics For environments with heavy scattering, NLOS scenarios and directional antennas at the receiver & transmitter, ray-tracing prediction of the clusters still seems to be reasonably close to the result of empirical measurement More studies are required to further validate the above statements Submission Slide 21

22 References Angle of Arrival Measurement in Home and Office Environments, Hirokazu Sawada, Yozo Shoji, Hiroyo Ogawa, National Institute of Information and Communications Technology (NICT), Japan, doc# IEEE c Study of the mmw ave propagation modeling to realize WPAN, Toshiyuki Hiroshi, doc# IEEE / Submission Slide 22