Sep. 2008 doc.: IEEE 802. 15-08-0651-01-003c Project: · PDF filedoc.: IEEE 802. 15-08-0651-01-003c Submission Sep. 2008 Slide 2 K. Sato, NICT 60GHz Applications and Propagation Characteristics

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Sep. 2008

Slide 1 K. Sato, NICT

Project: IEEE PProject: IEEE P802802..15 15 Working Group for Wireless Personal Area Networks (WPANs)Working Group for Wireless Personal Area Networks (WPANs)

Submission Title: [60GHz Applications and Propagation Characteristics]

Date Submitted: [8, September, 2008]

Source: [Katsuyoshi Sato, Hirokazu Sawada, Ryuhei Funada,

Hiroshi Harada, Shuzo Kato, Hiroyuki Nakase, Masahiro Umehira]

Company [National Institute of Information and Communications Technology,

Tohoku University, Ibaraki University]

Address [3-4, Hikarino-Oka, Yokosuka, Kanagawa, 239-0847, Japan]

Voice:[+81.46.847.5096], FAX: [+81.46.847.5079], E-Mail:[[email protected]]

Re: []

Abstract: [This contribution describes 60GHz propagation measurement of several condition.]

Purpose: [Contribution to VHT/mmW TG3c joint meeting.]

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.

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Sep. 2008


60GHz Applications and Propagation

Characteristics

Katsuyoshi Sato, Hirokazu Sawada, Ryuhei Funada, Hiroshi Harada,

Shuzo Kato, Hiroyuki Nakase and Masahiro Umehira

National Institute of Information and

Communication Technology (NICT), Japan

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Summary

• TG3c has adopted CM2.3 channel model for NLOS residential

environments – this was created by eliminating LOS

component from LOS channel model, and, later the real

measurements validated this as a good channel model for

severe communications environments

• This CM2.3 is good for beacon signal transmission from PNC

(Picone coordinator) with Omni antenna at both PNC and

Device up to 10 m coverage (typical coverage of WPAN)

• NLOS environments could be defined in many other ways

according to different applications such as beaconing,

desktop environments, intra room communications, long

transmission with very high antenna gain –which generates

very few delay spread

Sep. 2008


doc.: IEEE 802. 15-08-0651-01-003c

Submission

Sep. 2008


Agenda

Introduction

1. CM2.3: A valid NLOS channel model

i. Metal shadowing: Cabinet shadowing

ii. PC shadowing

2. Various NLOS environments and measurements

i. Common mode : up 10 m with Omni antenna - beaconing

ii. Long transmission: Door penetration

iii. PC Peripheral: Desktop penetration

3. High antenna gain applications

i. Delay spread

ii. Beam forming antenna

Conclusion

doc.: IEEE 802. 15-08-0651-01-003c

Submission

. CM2.3: A valid NLOS channel model

NLOS residential measurement

1,3,5m

Door

Win

do

w

Wall side

Window

Rotating

Table

(Step 5°)

6.85m3

.57

m

Network

Analyzer

Floor plan of residential environment

Tx 30°(16dBi)Rx 15°(22dBi)

Tx

L

K

J

H

G

F

E

D

C

B

A

Wood

-30°

0°

30°

60°

I

0°

50

°

Shadowing object

Metal Cabinet

– 70cm X 60cm X 40cm

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Sep. 2008


0 20 40 60 80 100-100

-80

-60

-40

-20

0

Delay time [ns]

Rel

ati

ve a

mp

litu

de

[dB

]

Example PDPs (Power delay profile) in NLOS residential

environment (Beam width: Tx=30, Rx=30)

NLOS direct-path component with

the penetration loss of the door

Tx Rx

1 m

Direct-path component remains in NLOS measurement

TSV model can model NLOS residential channels

clusters

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Metal Blocked: Example of Delay profile

Both antenna faced to each other

Sep. 2008


-100.0

-80.0

-60.0

-40.0

-20.0

0.0

0 20 40 60 80

Rela

tive

pow

er

[dB

]

Excess delay [ns]

LOS-05NLOS…

40 dB down due to shadowing

Almost same with/without shadowing object

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Metal Blocked: Example of Delay profile

Both antenna faced to wall

Sep. 2008


-100.0

-80.0

-60.0

-40.0

-20.0

0.0

0 20 40 60 80

Rela

tive

pow

er [

dB]

Excess delay [ns]

LOS-50NLOS…

40 dB down

due to shadowingNon-direct path

reflected on the wall:

Independent on the object

doc.: IEEE 802. 15-08-0651-01-003c

Submission

PC Blocking:Measurement environment

Tx

Rx Tx

Rx

LoS environment NLoS environmentShadowing object：PC’s

TXantenna

RXantenna

AntennaConical horn antennaBeam width：30o

(16dBi)Polarization : V,H,CAntenna height : 1m

doc.: IEEE 802. 15-08-0651-01-003c

Submission

LoS environment

Display Display

Display Display

Display Display

Display Display

Desk

TapBookshelf

InstrumentInstrument

Win

dow

TV


5770

mm

6713

mm

5880

mm

65

70

mm

Hea

ter

Fre

ezer

Inst

rum

ent

Inst

rum

ent

Booksh

elf

Bookshelf

Box

Box

Whit

e boar

d

Box

0.5

m

1m

Radius =

1.5m

T

x

R

xAntenn

as

Hea

ter

Inst

rum

ent

Angle of

rotation,

θ

MaterialsWall, floor：ConcreteWindow：GlassDoor : woodDesk, White board, Refrigerator : MetalTV，PC：Plastic + Metal

AntennaConical hornBeam width：30o

(16dBi)Polarization：V,H,Cheight:1m

Measurement conditionDistance ：1,2,3mRotation every 10 degree

doc.: IEEE 802. 15-08-0651-01-003c

Submission

PC Blocking: NLoS environment

Display Display

Display Display

Display Display

Display Display

Desk

TapBookshelf


Win

dow

TV


5770

mm

6713

mm

5880

mm

6570

mm

Hea

ter

Fre

ezer

Inst

rum

ent

Inst

rum

ent

Booksh

elf

Bookshelf

Box

Box

Whit

e boar

d

Box

Radius =

1.5m

T

x

R

xAntenn

as

Hea

ter

Inst

rum

ent

Angle of

rotation,

θ

MaterialsWall, floor：ConcreteWindow：GlassDoor : woodDesk, White board, Refrigerator : MetalTV, PC：Plastic + Metal

AntennaConical hornBeam width：30o

(16dBi)Polarization：V,H,Cheight:1m

Measurement conditionDistance ：3mRotation every 10 degree

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Sep. 2008


NLOS: Door - Measurement environment

Distance:1-3 m

Door: obstacle between Tx and Rx

Tx

Win

do

w

Wall side

Window

Rotation

Table

(Step 5°)Rx

Controller

6.85m

3.5

7m

Network

Analyzer

Floor plan of NLOS residential environment

Antenna

Hight:1.1 m

Ceiling

Height: 2.47 m

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Sep. 2008


Instrument HP8510C VNA

Center frequency 62.5 GHz

Bandwidth 3 GHz

Time resolution 0.333 ns

Distance resolution 19.1 cm

# of frequency points 801

Frequency step 3.75MHz

Times of average 128 times

Measurement conditions

Calibration performed with 1m reference separationTime resolution and distance resolution were determined by bandwidth

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Sep. 2008


Measurement conditions (cont’)

Antenna: Conical horn antenna Polarization: Vertical Beam-width: Tx:30 and Rx 30

Conical horn antenna

Beam-width 30 deg

doc.: IEEE 802. 15-08-0651-01-003c

Submission

NLOS:Penetration measurement ~ Office desktop~

-160

-140

-120

-100

-80

-60

-40

-20

0

-10 0 10 20 30 40 50 60 70 80 90

系…

Penetration loss was measured to be more than 50 dB.TX antenna : Omni(4dBi)), RX antenna : 15 degree(22dBi)

Time [nsec]

Rec

eive

d p

ow

er [

dB

]

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Penetration measurement

~ Low wooden desk ~

1200 mm

54

0 m

m

410 mm

240 mm

200 mm

RX antenna

TX antenna

0

2

1

3

4

5

6

7

8

Penetration loss: 10dB

240 mm

Without desktop (Direct) : -42.2 dB

100 mm

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-10 0 10 20 30 40 50 60 70 80 90

系

Delay Spread : 0.26 nsec

Loss[dB]

-10.5-17.5-16.5-18.9-24.0-23.7-18.3-22.7-34.8

ReceivedPower[dB]

-52.7-59.7-58.7-61.1-66.2-65.9-60.5-64.9-77.0

Position

012345678

doc.: IEEE 802. 15-08-0651-01-003c

Submission

NLOS: Penetration measurement

~ meeting desk ~

1600 mm

54

0 m

m

400 mm

270 mm

200 mm

RX antenna

TX antenna

0

2

1-65.9 dB250 mm

100 mm

70

0 m

m

-65.19-66.9-71.4-76.0-81.8-67.4-68.7-63.5-76.4-75.9-65.3-80.3-74.9

3

4

5

6

7

8

9

10

11

12

Without desktop (Direct) : -41.0 dB

400 mm

-24.19-25.9-30.4-35-40.8-26.4-27.7-22.5-25.4-34.9-24.3-39.3-33.9

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-10 0 10 20 30 40 50 60 70 80 90

Delay Spread : 0.51 nsec

ReceivedPower [dB] loss[dB]Position

0123456789

101112

doc.: IEEE 802. 15-08-0651-01-003c

Submission

Sep. 2008


0 5 10 15 20 25 30 350

10

20

30

40

50

60

70

80

90

100

RMS delay spread [ns]

CD

F [

%]

30deg,IPOINT=4, -20dB cut30deg, IPOINT=4, -30dB cut30deg, IPOINT=4, -40dB cut30deg, IPOINT=4, No cut30deg, IPOINT=8, -20dB cut30deg, IPOINT=8, -30dB cut30deg, IPOINT=8, -40dB cut30deg, IPOINT=8, No cut30deg, Continous, -30 dB cut

0 5 10 15 200

10

20

30

40

50

60

70

80

90

100

RMS delay spread [ns]

CD

F [

%]

15deg,IPOINT=4, 20dB cut15deg, IPOINT=4, 30dB cut15deg, IPOINT=4, 40dB cut15deg, IPOINT=4, No cut15deg, IPOINT=8, 20dB cut15deg, IPOINT=8, 30dB cut15deg, IPOINT=8, 40dB cut15deg, IPOINT=8, No cut15deg, Continous, -30 dB cut

•30 dB cut-off and no cut-off thresholds(*) give no difference in RMS delay spread•Continuous channel and discrete channels generated from the continuous give no difference in RMS delay spread•CM2.3 (WRx= 30deg with -30 dB cut-off threshold) (same result as previous )

• 90th percentile of CDF: 12.5 ns, and 100th percentile of CDF: 30.8 ns•WRx of 15 deg with -30 dB cut-off threshold

•90th percentile of CDF: 7.7 ns, and 100th percentile of CDF: 18.8 ns

Drms CDF with 30 deg (Original CM2.3) Drms CDF with 15 deg

RMS delay spread analysis of CM2.3

18

IPOINT denotes oversampling points

doc.: IEEE 802. 15-08-0651-01-003c

Submission

High Antenna Gain applications

To transmit LONG distance such as 30 m, a 30

dBi antenna gain will be required.

In such case, the measured delay spread is

very small (a couple of ns with 5 degree

HPBW antenna)

Direct as well as reflective wave is good enough

for communciations

TG3c specification includes beam forming to

track the best and 2nd best beam for more

reliable communciations

Sep. 2008


doc.: IEEE 802. 15-08-0651-01-003c

Submission

Conclusion

NLOS environments may be defined in

various ways according to different

applications.

CM2.3 channel model has been validate as a

good channel model for beacon signal

transmission to cover up to 10 m in NLOS

environments with Omni antenna

Beam forming antenna will resolve delay

spread issue a lot

Sep. 2008


Documents

Sep. 2008 doc.: IEEE 802. 15-08-0651-01-003c Project: · PDF filedoc.: IEEE 802. 15-08-0651-01-003c Submission Sep. 2008 Slide 2 K. Sato, NICT 60GHz Applications and Propagation Characteristics