March 2006 Slide 1 doc.: IEEE 802. 15-06-0109- 00-003c Submiss ion Chang-Soon Choi, NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Networks (WPANs) Submission Title: [Two-path channel model for wireless desktop applications] Date Submitted: [March, 2006] Source: [Hirokazu Sawada, Chang-Soon Choi, Yozo Shoji and Hiroyo Ogawa] Company [National Institute of Information and Communications Technology (NICT)] Address [3-4, Hikarino-Oka, Yokosuka, Kanagawa, 239-0847, Japan] Voice:[+81.46.847.5096], FAX: [+81.46.847.5079], E-Mail: [[email protected], [email protected], [email protected] and [email protected]] Re: [] Abstract: [This contribution describes a two-path channel model for wireless desktop applications.] Purpose: [Contribution to mmW TG3c 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
Transcript
March 2006
Slide 1
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Two-path channel model for wireless desktop applications]Date Submitted: [March, 2006]Source: [Hirokazu Sawada, Chang-Soon Choi, Yozo Shoji and Hiroyo Ogawa] Company [National Institute of Information and Communications Technology (NICT)]Address [3-4, Hikarino-Oka, Yokosuka, Kanagawa, 239-0847, Japan]Voice:[+81.46.847.5096], FAX: [+81.46.847.5079], E-Mail:[[email protected], [email protected], [email protected] and [email protected]] Re: []
Abstract: [This contribution describes a two-path channel model for wireless desktop applications.]
Purpose: [Contribution to mmW TG3c 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.
Hirokazu Sawada, Chang-Soon Choi, Yozo Shoji and Hiroyo Ogawa
National Institute of Information and Communications Technology(NiCT), Japan
March 2006
Slide 3
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
Motivation
- S-V model
- S-V model has the difficulty to express wireless desktop applications- No parameters describing height dependence- Complex
- Simple two-path model is proposed for these applications.
11
, ,0 0
( ) ( )lKL
k l l k ll k
h t t T
L = number of clusters;Kl = number of multipath components (number of rays) in the l-th cluster; = multipath gain coefficient of the k-th ray in the l-th cluster;Tl = arrival time of the first ray of the l-th cluster;k,l = delay of the k-th ray within the l-th cluster relative to the first path arrival time, Tl;
Ref: IEEE 802.15-05-0412-00-003c
,k l
March 2006
Slide 4
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
Two-path model example 1:High quality video/image sharing
h1
Tx
h2
L
d1
d2
Rx
Desk
- Usage: Short-range communications in desktop environments- Line of Sight (LOS) conditions- Application scenario: high quality video/image sharing
March 2006
Slide 5
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
Two-path model example 2:Hot-spot service scenario
Tx
Ld1
d2
Rx
Desk
h2
Wall
- Application scenario: hot-spot service
March 2006
Slide 6
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
tTtth )(
- Simple two-path model
L
d1
d2
cd
cdT
/
/
2
1
Direct Reflected
h1h2
22
122
22121
Lhhd
Lhhd
for directly transmitted signal
for reflected signal from the ground
CIR
h(t) = complex impulse response (CIR), transmitter signalc = velocity of lightT = Arrival time for directly transmitted signal = Arrival time for reflected signal from the ground = Reflection coefficient
Proposed two-path model
- Two-path model is suitable to express height dependence.- Two-path model is deterministic and simple.
March 2006
Slide 7
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
Path loss under proposed two-path model
21,hhL If ,
2
21
222
exp14
L
hhj
LP
P
t
r
Approximation
- Path loss of two-path model
2
12
22
exp14
ddj
LP
P
t
r
= path length difference= wavelength of electromagnetic wave
d1 - d2
100 120 140 160 180 200-120
-110
-100
-90
-80
-70
Receiver height, h2 [mm]P
ath
loss
, Pr/P
t [dB
]
Two-pathFree-space
h1=150mmL=3mf=62.5GHz
Fig. Calculated path loss vs. receiver height
March 2006
Slide 8
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
Experimental verification
h1=150mm h2=100 ～ 200 mm
L=3 m
Tx Rx2 m
0.7 m
Wooden table
- Experimental conditions
March 2006
Slide 9
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
Experimental conditions: photograph
Rx side
Tx side
Instrument HP8510C VNA
Sweep frequency 61-64GHz
# of frequency points 801
Distance resolution 191mm
The number of average times
128
Table size Wooden, 1.2m×3.6m,
Height: 0.7m
Room size 2.7m×15m×13m
Antenna Conical horn antenna
Experimental conditions
Distance resolution (191mm) was limited by measurement equipments
3m
March 2006
Slide 10
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
TX-Rx Antenna Conical Horn Antenna
Beam width 60 deg (E-plane)
60 deg (H-plane)
Polarization Vertical wave
Out-view Antenna pattern
Conical horn antenna
March 2006
Slide 11
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
Results: Path loss vs. receiver height
Receiver antenna height [mm]
Path
loss
[dB
]
100 120 140 160 180 200-120
-110
-100
-90
-80
-70
Meas.Two-pathFree-space
- Proposed two-path model is suitable to express the height dependence in wireless desktop environments (cf. difficult in S-V model)
March 2006
Slide 12
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
0 50 100 150
-110
-100
-90
-80
-70
Typical response under low path-loss conditions
- Two rays are 26.7dB higher than other multipath rays- Measured frequency response is well-matched to calculated one
Time [ns]
h1=150mm
h2=125mmRel
ativ
e po
wer
[dB
]
26.7dB
61 62 63 64
-110
-100
-90
-80
-70
Pat
h lo
ss [
dB]
Frequency [GHz]
Two rays are includedMeasuredCalculated
Fig. Power Delay Profile (PDP) Fig. Frequency Response
-Two-path model is suitable to model this condition
h2=125mm
h1=150mm
March 2006
Slide 13
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
0 50 100 150
-110
-100
-90
-80
-70
Time [ns]
Rel
ativ
e po
wer
[dB
]
10.7dB
h1=150mm
h2=100mm
61 62 63 64
-110
-100
-90
-80
-70
Frequency [GHz]P
ath
loss
[dB
]
h1=150mm
Measured
Calculated
h2=125mm
- Two-rays are only 10.7dB higher than other multipath rays- Severe frequency fading effects can be observed
-Two-path model + S-V model is required
Fig. Power Delay Profile (PDP) Fig. Frequency Response
frequencyselective fadingTwo rays are included
Typical response under high path-loss conditions
March 2006
Slide 14
doc.: IEEE 802. 15-06-0109-00-003c
Submission
Chang-Soon Choi, NICT
Summary
- Two-path model is proposed for wireless desktop applications
1) Two-path model is suitable to express height dependence of transceiver.
2) Under low path-loss condition, two-path model is suitable.
3) Under high path-loss condition, two-path model + S-V model is required.
- Two-path model should be included in mmW channel models
