doc.: IEEE 802.15-06-0326-00-003c
Project: IEEE P802.15 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:[301-975-5479], E-Mail:[ksayrafian@nist.gov]
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 802.15 TG3c at the July 2006 meeting in San Diego, USA]
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.
2006-07-18
Submission
Slide 1
doc.: IEEE 802.15-06-0326-00-003c
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
2006-07-18
Submission
Slide 2
doc.: IEEE 802.15-06-0326-00-003c
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
2006-07-18
Submission
Slide 3
doc.: IEEE 802.15-06-0326-00-003c
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
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Submission
Slide 4
doc.: IEEE 802.15-06-0326-00-003c
TX Antennas used (Residential, LOS)
62.5GHz/60°horn
Max. of gain: 10 dBi
2006-07-18
62.5GHz/30°horn
Max. of gain: 16 dBi
Submission
62.5GHz/15°horn
Max. of gain: 22 dBi
Slide 5
doc.: IEEE 802.15-06-0326-00-003c
Layout-Geometry (Residential, LOS)
0.48m
TX
1.925m
3m
1.48m
1.64m
1.12m
3.57m
RX
Window #3
1.785m
1.64m
Door (Width: 0.75m,
Height: 2.12m)
0.965m
Wall side
1.64m
Window #2
Window #1
6.85m
2006-07-18
Submission
0.97m
Slide 6
doc.: IEEE 802.15-06-0326-00-003c
Layout-Geometry (Residential, LOS)
3D View of the Room
¾ Ceiling height: 2.47m
¾ Window Height: 2.11m
¾ TX & RX Height: 1.1m
¾ Polarization : Vertical
¾ Tx antenna: always fixed
¾ Rx antenna: rotated from
0 to 360 degree in 5
degree step
Window #1
Window #2
Window #3
2006-07-18
Submission
Slide 7
doc.: IEEE 802.15-06-0326-00-003c
Cluster Identification (LOS, TX:360, RX:15)
Experiment
Simulation
2D-KDE (NICT, Tx-360, Rx-15, Residential-LOS, -35 dB Threshold)
80
80
D e la y ( n s e c )
2D-KDE (WiSE, Tx:360, Rx:15, Residential-LOS)
60
D e la y ( n s e c )
60
40
40
20
20
0
0
-50
2006-07-18
0
50
100
150
Azimuth (Degree)
200
250
Submission
-50
0
50
100
150
Azimuth (Degrees)
200
250
Slide 8
doc.: IEEE 802.15-06-0326-00-003c
Cluster Identification (LOS, TX:360, RX:15)
Cluster #
Approx. Cluster
Arrival Angel (Deg)
Approx. Cluster
Arrival Time (nsec)
1
0
10
2
-50
15.5
3
50
15.5
4
-70
25.75
5
70
25.75
6,7
160, 210
25.75
8
180
22.75
9
0
22.75
2006-07-18
Submission
Experiment
Simulation
?
Slide 9
doc.: IEEE 802.15-06-0326-00-003c
LOS & Single Reflection Clusters
(Residential)
Cluster 2
Tx
Rx
-50
Cluster 1
50
Cluster 3
2006-07-18
Submission
Slide 10
doc.: IEEE 802.15-06-0326-00-003c
Double Reflection Clusters (Residential)
Cluster 4
Tx
Rx
-70
70
Cluster 5
2006-07-18
Submission
Slide 11
doc.: IEEE 802.15-06-0326-00-003c
Other Double Reflection Clusters
(Residential)
Rx
Tx
Cluster 7
210
Cluster 6
2006-07-18
160
Submission
Slide 12
doc.: IEEE 802.15-06-0326-00-003c
Reflection from the back wall, RX-Side
(Residential)
Tx
Rx
Cluster 8
180
2006-07-18
Submission
Slide 13
doc.: IEEE 802.15-06-0326-00-003c
Reflection from the back wall, TX-Side
(Residential)
Tx
Rx
Cluster 9
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Submission
Slide 14
doc.: IEEE 802.15-06-0326-00-003c
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)
0.09
Simulation
Experiment
Percentage of Occurance
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
2006-07-18
-150
-100
-50
0
50
Relative Arrival Angle (Degrees)
Submission
100
150
Slide 15
doc.: IEEE 802.15-06-0326-00-003c
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
2006-07-18
Submission
Slide 16
doc.: IEEE 802.15-06-0326-00-003c
Layout-Geometry (Office, NLOS)
4m
10 m
Desk
Desk
Desk
12.5 m
Rx
7.2 m
Desk
Desk
Desk
7m
Desk
5m
3.5 m
6m
Desk
Meeting
room
0.5 m
Tx
4.25 m
6.25 m
3.5 m
7.5 m
Locker room
2m
7.5 m
1.5 m
Wall (22 m)
2006-07-18
Submission
Slide 17
doc.: IEEE 802.15-06-0326-00-003c
Layout-Geometry (Office, NLOS)
1.5 m
1.25 m
1.5 m
3.5 m
2006-07-18
Submission
Slide 18
doc.: IEEE 802.15-06-0326-00-003c
Cluster Identification (Experiment, NLOS,
TX:360, RX:15)
Experiment
Simulation
2D-KDE (NICT, Tx-360, Rx-15, Office-NLOS, -35 dB Threshold)
2D-KDE (WiSE, Tx:360, Rx:15, Office-NLOS)
150
D e la y ( n s e c )
D e la y ( n s e c )
150
100
100
50
0
50
-50
2006-07-18
0
50
100
150
Azimuth (Degree)
200
250
0
Submission
-50
0
50
100
150
Azimuth (Degrees)
200
250
Slide 19
doc.: IEEE 802.15-06-0326-00-003c
Cluster Identification (Experiment, NLOS,
TX:30, RX:15)
Experiment
Simulation
2D-KDE (WiSE, Tx:30, Rx:15, NLOS)
2D-KDE (NICT, Tx:30, Rx:15, Office-NLOS)
150
D e la y ( n s e c )
D e la y ( n s e c )
150
100
100
50
50
0
-50
2006-07-18
0
50
100
150
Azimuth (Degrees)
200
250
0
Submission
-50
0
50
100
150
Azimuth (Degrees)
200
250
Slide 20
doc.: IEEE 802.15-06-0326-00-003c
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
2006-07-18
Submission
Slide 21
doc.: IEEE 802.15-06-0326-00-003c
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
802.15-06-0012-01-003c
‰ “Study of the mmW ave propagation modeling to realize WPAN”,
Toshiyuki Hiroshi, doc# IEEE802.15-03/0365
2006-07-18
Submission
Slide 22