Name Affiliations Address Phone email€¦ · Name Affiliations Address Phone email Hirokazu Sawada...

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doc.: IEEE 802.11-09/0936r1 Submission September, 2009 Hirokazu Sawada, Tohoku University Slide 1 [Intra-cluster response model and parameter for channel modeling at 60GHz] Date: 2009-09-23 Name Affiliations Address Phone email Hirokazu Sawada Tohoku University 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JAPAN +81-22-217-6112 [email protected] Shuzo Kato NICT/ Tohoku University 3-4, Hikarino-Oka, Yokosuka, Kanagawa 239-0847 Japan [email protected] Katsuyoshi Sato NICT 3-4, Hikarino-Oka, Yokosuka, Kanagawa 239-0847 Japan [email protected] Authors:

Transcript of Name Affiliations Address Phone email€¦ · Name Affiliations Address Phone email Hirokazu Sawada...

Page 1: Name Affiliations Address Phone email€¦ · Name Affiliations Address Phone email Hirokazu Sawada Tohoku University 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JAPAN +81-22-217-6112

doc.: IEEE 802.11-09/0936r1

Submission

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 1

[Intra-cluster response model and parameter for channel

modeling at 60GHz]

Date: 2009-09-23

Name Affiliations Address Phone email

Hirokazu Sawada Tohoku University 2-1-1 Katahira, Aoba-ku,

Sendai 980-8577, JAPAN

+81-22-217-6112 [email protected]

Shuzo Kato NICT/ Tohoku

University

3-4, Hikarino-Oka,

Yokosuka, Kanagawa

239-0847 Japan

[email protected]

Katsuyoshi Sato NICT 3-4, Hikarino-Oka,

Yokosuka, Kanagawa

239-0847 Japan

[email protected]

Authors:

Page 2: Name Affiliations Address Phone email€¦ · Name Affiliations Address Phone email Hirokazu Sawada Tohoku University 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JAPAN +81-22-217-6112

doc.: IEEE 802.11-09/0936r1

Submission Hirokazu Sawada, Tohoku UniversitySlide 2

Abstract

[This document describes intra-cluster channel models

and antenna beam width effect for TGad channel

modeling.]

1. Proposals of intra-cluster channel models for living,

conference and cubicle environments

2. Antenna beam width effect analysis on the intra cluster

parameters

3. Inter cluster parameter analysis based on measurement

results are started

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Current status of channel models and this contribution

Slide 3

Environments Inter cluster channel

modeling

Intra cluster

by measurements

Dual polarization

feasibility

Conference Previous works Done by ray trace

simulation

Done Done

Conclusion?

Team of Tohoku

Univ. and NICT

Measurement: Done

Modeling:

Measurement: Done

Modeling: Done

DoneLinier pol.: STA-STA OK

AP-STA ?

Potable device-AP, STA: NGCircular pol.: STA-STA OK

AP-STA OK

Potable device-AP, STA: NG

Living Previous works Not yet Not yet Not yet

Team of Tohoku

Univ. and NICT

Measurement: Done

Modeling:

Measurement: Done

Modeling: Done

HPBW analysis: Done

Done

Linier pol.: OK

Circular pol.: OK

Cubicle Previous works Not yet Not yet Not yet

Team of Tohoku

Univ. and NICT

Measurement: Done

Modeling:

Measurement: Done

Modeling: Done

Done

Linier pol.: STA-STA OK

AP-STA ?

Circular pol.: STA-STA OK

AP-STA OK

Potable device-AP,STA: NG

Hirokazu Sawada, Tohoku University

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Difference between previous works and TU&NICT measurements

Previous works Tohoku Univ. and NICT

Bandwidth 800MHz 3GHz (Required for multi Gbps transmission)

Environment Conference Conference

Living

Cubicle

Antenna※ 17deg (18dBi) In conference room

• 30deg (16dBi) for STA

• 60deg(10dBi) for AP

In living room

• 5, 30, 60, 90 deg

In cubicle

• 30deg (16dBi) for STA

• 60deg(10dBi) for AP

Polarization Vertical

Horizontal

Circular(RHCP, LHCP)

Vertical

Horizontal

Circular

※Evaluation methodology defined the maximum antenna gain 14dBi

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Measurement procedure and results

in living room

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 5

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doc.: IEEE 802.11-09/0936r1

Submission

Measurement system

Instrument: Vector network analyzer

Antenna: Conical horn antenna

q f

Hirokazu Sawada, Tohoku UniversitySlide 6

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Measurement set up in living room

Parameter Value

Center frequency 62.5 GHz

Band width 3 GHz

Number of frequency points 801

Frequency step 3.75 MHz

HPBW of antenna (Gain) 30 degree

Polarization Vertical, Horizontal, Circular

Calibration Direct port connection without

antennas

Hirokazu Sawada, Tohoku UniversitySlide 7

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission Slide 8

Antenna height:

1.5m (LoS scenario)

1.0 m (NLoS scenario)

Hirokazu Sawada, Tohoku University

September, 2009

Floor plan of living room

‘defined by TGad’

D = 3m

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doc.: IEEE 802.11-09/0936r1

Submission

Living room measurement snap shot

Slide 9

Tx Rx3m (LoS)

Hirokazu Sawada, Tohoku University

September, 2009

1.5m1m

1.5m1m

3m (NLOS)

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doc.: IEEE 802.11-09/0936r1

Submission

Received power in LOS/NLoS scenarios for co-pol. signal waves

(Ref. Doc.09/874)

Slide 10

Strong reflection waves came from (AoD, AoA)=(10o, 270o),

(200o, 270o), (250o, 250o) in LOS scenario

In NLOS scenario, LOS component attenuated by human absorber

LOS scenario NLOS scenario

Hirokazu Sawada, Tohoku University

September, 2009

Strong reflection waves

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doc.: IEEE 802.11-09/0936r1

Submission Slide 11

Antenna height:

1.5m (LoS scenario)

1.0 m (NLoS scenario)

Hirokazu Sawada, Tohoku University

September, 2009

Examples of strong reflection

wave path in LOS scenario

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doc.: IEEE 802.11-09/0936r1

Submission

Impulse response example of LOS scenario

(V-V) in living room environment

Slide 12

Top 3 strong reflection responses excluding direct path

are selected for intra cluster parameter extractionHirokazu Sawada, Tohoku University

September, 2009

-10 0 10 20 30 40 50 60 70 80 90-140

-120

-100

-80

-60

-40 AoD=0

o, AoA=0

o

AoD=10o, AoA=270

o

AoD=200o, AoA=270

o

AoD=250o, AoA=250

o

ToA [ns]

Rel

ativ

e p

ow

er [

dB

]

Page 13: Name Affiliations Address Phone email€¦ · Name Affiliations Address Phone email Hirokazu Sawada Tohoku University 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JAPAN +81-22-217-6112

doc.: IEEE 802.11-09/0936r1

Submission

Proposed intra-cluster response model

Two-side exponential decay model

Ray decay parameter, g- and g+

Ray arrival rate, l- and l+ is assumed as Poisson process

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 13

Relative time of arrival[ns]

Pow

er[d

B]

te +-gt

e -g

0 1 n1-m ……

Peak power ray in the cluster n

m

iith )(

+

-

-0

02

te

tet

t

ii g

g

0,1

1 -+ --

+- keP kk

kk

ll

0,1

1 ----

-- keP kk

kk

ll

where k denotes the number of rays

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doc.: IEEE 802.11-09/0936r1

Submission

Extraction process of ray information

0 10 200

0.02

0.04

0.06

0.08

Time of arrival [ns]

|S2

1|

0 10 200

0.02

0.04

0.06

0.08

Time of arrival [ns]

|S21|

Before After

Pulse

subtraction

Iteration

By the iteration of peak-detection and pulse-subtraction,

each ray information (Power and ToA) can be extracted

Peak-detection

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Example of extracted ray information for

intra cluster modeling (Living environment)

Hirokazu Sawada, Tohoku UniversitySlide 15

Responses are limited within ±15ns by considering the decay slope

Threshold level set to the 30 dB down from the peak power

September, 2009

-10 0 10 20 30 40 50 60 70 80 90-140

-120

-100

-80

-60

-40

ToA [ns]

Rel

ativ

e p

ow

er [

dB

]AoD=200

o, AoA=270

o

Measurement Extracted ray

30dB

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doc.: IEEE 802.11-09/0936r1

Submission

Example of decay parameter extraction

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 16

Decay parameter was extracted by linear fitting

-15 -10 -5 0 5 10 15-8

-6

-4

-2

0

Relative time [ns]

ln(

2)

g+=1.29g-=0.652

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doc.: IEEE 802.11-09/0936r1

Submission

Example of arrival rate parameter

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 17

Arrival rate parameter was also extracted by linear fitting

0 1 2 3 4 5-3

-2

-1

0

l- = 0.5581/l- = 1.79 [ns]

Ray arrival time [ns]

ln(1

-CD

F)

0 1 2 3 4 5-3

-2

-1

0

l+ = 0.9021/l+ = 1.11 [ns]

ln(1

-CD

F)

Ray arrival time [ns]

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doc.: IEEE 802.11-09/0936r1

Submission

Intra cluster channel model for living environment

(HPBW=30deg)

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 18

LoS/NLoS Pol. g-[ns]

g+[ns]

1/l-[ns]

1/l+[ns]

LoS

V 0.652 1.29 1.79 1.11

H 0.645 1.03 3.63 0.699

C 0.623 0.854 4.88 0.968

NLoS

V 0.981 2.64 1.46 0.949

H 2.66 2.14 0.424 0.984

C 0.891 1.78 0.722 1.28

g: Decay coefficient

1/l is large: Number of ray is small

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doc.: IEEE 802.11-09/0936r1

Submission

Conference room environment “defined by TGad”

Hirokazu Sawada, Tohoku UniversitySlide 19

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission Slide 20

Relative received power of the link 7 (STA5-STA3) (Ref. Doc.09/874)

V-V H-H C-CThe reflections from table top was included in the measurements

(Ref. Doc. P802.15-06/297r2 slide.5)

Top 3 strong reflection responses excluding direct path are selected

for intra cluster parameter extraction

LOS

scenario

NLOS

scenario

Hirokazu Sawada, Tohoku University

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Intra cluster parameter for conference environment

(HPBW=30deg)

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 21

LoS/NLoS Pol. g-[ns]

g+[ns]

1/l-[ns]

1/l+[ns]

LoS

Link 7

V 0.613 4.11 1.65 1.35

H 0.510 0.779 2.70 1.92

C 0.569 0.831 2.02 1.73

NLoS

Link 7

V 0.795 0.693 1.25 0.271

H 0.798 0.853 2.44 1.82

C 0.967 0.567 0.861 1.77

Including a reflection from desktop

Ref. (Hirokazu Sawada Doc. )

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doc.: IEEE 802.11-09/0936r1

Submission

Cubicle office environment

“Defined by TG ad (Japanese size office)”

Slide 22 Hirokazu Sawada, Tohoku University

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Laptop PC to LCD monitor link

RxTx

Measurement set up

N.A.

RxTx

Manually rotation (30deg step)

This is a very short range transmission scenario.

Hirokazu Sawada, Tohoku UniversitySlide 23

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Laptop PC to LCD monitor link

Slide 24

V-V H-H

C-CDirect wave is dominant, significant reflection wave was not observed.

Channel characteristics is almost AWGN.

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

-60

-40

-20

0

ToA [ns]R

elat

ive

rece

ived

po

wer

[d

B]

Polarization V-V H-H C-C

Hirokazu Sawada, Tohoku University

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Intra cluster parameter

(HPBW=30deg, Cubicle environments)

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 25

LoS/NLoS Pol. g-[ns]

g+[ns]

1/l-[ns]

1/l+[ns]

LoS

V 0.623 0.731 9.51 2.06

H 1.87 0.927 0.773 1.31

C 3.16 0.654 0.627 2.53

1/l is large in cubicle environments: Number of rays is small

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doc.: IEEE 802.11-09/0936r1

Submission

AP-STA link

AP-STA Link

Tx

Rx

Inside of a cubicle

This is a vertical transmission link scenario.

Hirokazu Sawada, Tohoku UniversitySlide 26

July, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Example of impulse responses for co-and

cross-polarized signal waves

Slide 27

-10 0 10 20 30 40 50 60 70 80 90-120

-100

-80

-60

-40

-20

Polarization V-V H-H C-C

ToA [ns]

Rel

ativ

e re

ceiv

ed p

ow

er [

dB

]

-10 0 10 20 30 40 50 60 70 80 90-120

-100

-80

-60

-40

-20

ToA [ns]R

elat

ive

rece

ived

po

wer

[d

B]

Polarization V-H H-V

Co-polarized signal waves Cross-polarized signal waves

Reflection waves construct cluster, then the intra cluster

channel model will be required for AP-STA link too

Hirokazu Sawada, Tohoku University

July, 2009

Direct wave

Reflection wave

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doc.: IEEE 802.11-09/0936r1

Submission

Effect of antenna beam width to intra-cluster parameter

Number of rays in the cluster depends on antenna

beam width

Slide 28 Hirokazu Sawada, Tohoku University

September, 2009

Time of arrival

Pow

er

Ray

Rx

Ray

Narrow beam

Cluster

Wide beam

Time of arrival

Pow

erCluster

Ray Wide beam increases

the number of rays

Number of rays is small

in narrow beam

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doc.: IEEE 802.11-09/0936r1

Submission

Measurement set up in living room

Parameter Value

Center frequency 62.5 GHz

Band width 3 GHz

Number of frequency points 801

Frequency step 3.75 MHz

HPBW of antenna (Gain) 5, 15, 30, 90 degree

Polarization Vertical

Calibration Direct port connection without

antennas

Hirokazu Sawada, Tohoku UniversitySlide 29

September, 2009

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doc.: IEEE 802.11-09/0936r1

Submission

Example of cluster impulse response

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 30

Intra cluster response was changed by HPBW of the antenna

Intra cluster channel models are required for each HPBW

In the figure, the antenna

direction was fine tuned to

peak power angle for narrow

beam.

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doc.: IEEE 802.11-09/0936r1

Submission

Intra cluster parameter difference against

HPBW (Living room environment)

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 31

LoS/NLoS Pol. HPBW g-[ns]

g+[ns]

1/l-[ns]

1/l+[ns]

LoS V

5 N/A N/A N/A N/A

15 4.76 N/A 0.902 N/A

30 0.652 1.29 1.79 1.11

90 0.795 0.672 1.26 0.690

Narrow beam did not construct cluster

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doc.: IEEE 802.11-09/0936r1

Submission

-10 0 10 20 30 40 50 60 70 80 90-140

-120

-100

-80

-60

-40

ToA [ns]

Rel

ativ

e p

ow

er [

dB

]

AoD=0o, AoA=0

o

AoD=10o, AoA=270

o

AoD=200o, AoA=270

o

AoD=110o, AoA=260

o

AoD=110o, AoA=350

o

AoD=190o, AoA=10

o

AoD=330o, AoA=130

o

AoD=250o, AoA=250

o

AoD=260o, AoA=30

o

Inter cluster parameter based on measurements

(Living room)

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 32

We trying to extract inter cluster channel model parameter for

living and cubicle environment

v

Cluster included

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doc.: IEEE 802.11-09/0936r1

Submission

Inter cluster channel model

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 33

Relative time of arrival[ns]

Pow

er[d

B]

te -

0T1T nT…

n

m

iith )(

t

i eTi

-2

0,1

1 ---

- keTTP kk TT

kk

where k denotes the number of clusterss

Direct wave

Reflection waves

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doc.: IEEE 802.11-09/0936r1

Submission

Example of inter cluster channel model parameter

based on measurement results (in Living room)

September, 2009

Hirokazu Sawada, Tohoku UniversitySlide 34

Cluster decay parameter,

Cluster arrival rate, is assumed as Poisson process

0 5 10 15 20-6

-4

-2

0

ToA [ns]

ln(

2)

=-0.312

0 1 2 3-2

-1

0

Cluster arrival time [ns]

ln(1

-CD

F) =0.443

1/=2.26

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doc.: IEEE 802.11-09/0936r1

Submission

Summary

Intra cluster channel model was proposed with extracted parameters for living, conference and cubicle environments

Intra cluster parameter difference against HPBW (Living room environment) is shown

Three measurement environment with three polarization were performed for Tgad

Some inter cluster channel model parameter were extracted

Hirokazu Sawada, Tohoku UniversitySlide 35

September, 2009