Submission

doc.: IEEE 11-12/0421March 2012

Alina Liru Lu, NICTSlide 1

Outdoor Channel Models for 802.11afDate: 2012-03-14

Name Affiliations Address Phone email Lu Liru (Alina) NICT Smart Wireless Lab, NICT +65 6771 1006 liru@nict.com.sg

Masayuki Oodo NICT Smart Wireless Lab, NICT moodo@nict.go.jp

Lan Zhou NICT Smart Wireless Lab, NICT lan@nict.go.jp

Chen Sun NICT Smart Wireless Lab, NICT csun@ieee.org

Yohannes Alemseged

NICT Smart Wireless Lab, NICT yohannes@nict.go.jp

Ming Tuo Zhou NICT Smart Wireless Lab, NICT Mingtuo@nict.go.jp

Hiroshi Harada NICT Smart Wireless Lab, NICT harada@nict.go.jp

Authors:

Submission

doc.: IEEE 11-12/0421

Abstract In this presentation, we discuss the

channel models of VHF/UHF band for the range of about 0.1 to 15km for urban/sub-urban area to assist corresponding system design and be used for performance evaluation.

Alina Liru Lu, NICTSlide 2

Submission

doc.: IEEE 11-12/0421

Proposed Channel Models

The following three aspects will be covered in this presentationRMS Delay SpreadPath Loss ModelChannel Impulse Response Profile

to assist the PHY/MAC design, link budget calculation, system level simulation and data link simulation

Alina Liru Lu, NICTSlide 3

Submission

doc.: IEEE 11-12/0421

RMS Delay Spread

Table 1 shows the calculated RMS Delay Spread based on VHF band measurement results for Japan Public broadband network [1].The average RMS delay spread highly depends on the environment such as terrain type.

Table 1

Table 2 [2]

[1] M. OODO, N. SOMA, R. FUNADA and H. HARADA, “Channel Model for Broadband Wireless Communication in the VHF-band”, IEICE Technical Report

Index of Measured Points

P16 P5 P4 P1 P3 P6 P15 P2 P7 P14 P8 P13 P12 P11 P10 P9

Distance (km) 1.4 1.5 1.6 1.8 1.8 2.7 2.8 3.2 4.7 6.1 7.7 9.6 12.3 13.6 15.6 16

RMS Delay Spread (µs)

0.61 029 0.45 0.4 1.4 0.82 0.29 7.9 0.74 1.79 20.6 12.2 10.9 8.4 6.5 17.8

Measure frequency 200MHz

Hb=45m

Hm=2m

BS Power 20W

Alina Liru Lu, NICTSlide 4

Submission

doc.: IEEE 11-12/0421

RMS Delay SpreadMonth Year

Slide 5

0 2 4 6 8 10 12 14 160

5

10

15

20

25

Distance (km)

RM

S D

ela

y S

prea

d (M

icro

-Se

c)

P13

P8

P12

P11

P10

P9

P14

P2

P7

P5

P4

P1P16P6

P15

P3

Worse case RMS delay can have a major impact on system performance. RMS delay spread highly depends on the environment instead of distance

Alina Liru Lu, NICT

Avg RMS delay 1.52µs

Avg RMS delay 1.52µs

Avg RMS delay 8.83µs

Avg RMS delay 8.83µs

Avg RMS delay 10.9µs

Avg RMS delay 10.9µs

Submission

doc.: IEEE 11-12/0421Month Year

Alina Liru Lu, NICTSlide 6

RMS Delay Spread

[2] Theodore S. Rappaport, Wireless Communications: Principles and Practice (2nd Edition), Prentice Hall, ISBN: 0130422320 Publish Date: Dec 31, 2007

[2]

Worse case RMS delay can have a major impact on system performance, it has better to consider worse case scenario during system design.

Submission

doc.: IEEE 11-12/0421

Okumura-Hata [3]

Revised Hata [4]

ITU-R P.1546-4 [5]

ITU-R P.1812-1 [6]

Frequency 150 MHz to 1.5 GHz 30MHz to 3GHz 30 MHz to 3 GHz 30 MHz to 3 GHz

Transmission range

1 to 20 km <100km 1 to 1000 km 0.25 to 3000 km

BS antenna height

30 to 200 m <200m < 3000 m; interpolation for <

10 m

1 to 3000 m

MS antenna height

1 to 10 m; with correction

factor

<200m ≥ 1 m and < 3000 m;

with correction for clutter height

1 to 3000 m

Computation complexity

Low Low Medium High

Environment Mid/Small Urban, Large Urban,

Suburban, Rural (Open)

Urban, Suburban, Open space

Dense Urban, Urban, Suburban,

Rural, Warm Sea, Cold

Sea, Mixed Land-Sea

Dense Urban, Urban/Trees,

Suburban, Open, Coastal, Sea

Path Loss Model

[3] M. Hata, “Empirical formula for propagation loss in land mobile radio services,” IEEE Trans. Vehicular Technol., vol. 29, pp. 317–325, Aug. 1980.[4] ERC Report 68, “Monte-Carlo Simulation Methodology for the Use in Sharing and Compatibility Studies Between Different Radio Services or systems”[5] ITU-R, “Method for point-to-area predictions for terrestrial services in the frequency range 30 MHz to 3000 MHz,” Recommendation ITU-R P.1546-4, Oct. 2009.[6] ITU-R, “A path-specific propagation prediction method for point-to-area terrestrial services in the VHF and UHF bands,” Recommendation ITU-R P. P.1812-1, Oct. 2009.

Revised Hata model is recommended based on the above comparison

Alina Liru Lu, NICTSlide 7

Submission

doc.: IEEE 11-12/0421Channel Impulse Response Model [1]

[1] M. OODO, N. SOMA, R. FUNADA and H. HARADA, “Channel Model for Broadband Wireless Communication in the VHF-band”, IEICE Technical Report

Alina Liru Lu, NICTSlide 8

Submission

doc.: IEEE 11-12/0421

Summary

The presentation proposes channel models for medium to long range TV White Space communications.

The proposed Channel Models covers RMS Delay SpreadPath Loss ModelChannel Impulse Response Profile

The proposed models can be considered to use for the design and simulation of TV White space communications system with communication ranges of about 0.1 to15km.

Alina Liru Lu, NICTSlide 9

Submission

doc.: IEEE 11-12/0421

References[1] M. OODO, N. SOMA, R. FUNADA and H. HARADA, “Channel Model for

Broadband Wireless Communication in the VHF-band”, IEICE Technical Report

[2] Theodore S. Rappaport, Wireless Communications: Principles and Practice (2nd Edition), Prentice Hall, ISBN: 0130422320 Publish Date: Dec 31, 2007

[3] M. Hata, “Empirical formula for propagation loss in land mobile radio services,” IEEE Trans. Veh. Technol., vol. 29, pp. 317–325, Aug. 1980.

[4] ERC Report 68, “Monte-Carlo Simulation Methodology for the Use in Sharing and Compatibility Studies Between Different Radio Services or systems”

[5] ITU-R, “Method for point-to-area predictions for terrestrial services in the frequency range 30 MHz to 3000 MHz,” Recommendation ITU-R P.1546-4, Oct. 2009.

[6] ITU-R, “A path-specific propagation prediction method for point-to-area terrestrial services in the VHF and UHF bands,” Recommendation ITU-R P. P.1812-1, Oct. 2009.

Alina Liru Lu, NICTSlide 10

Submission

doc.: IEEE 11-12/0421

Appendix

Alina Liru Lu, NICTSlide 11

Submission

doc.: IEEE 11-12/0421

Revised Hata ModelFormulas for calculation of Median Path Loss

Alina Liru Lu, NICTSlide 12

Submission

doc.: IEEE 11-12/0421

Revised Hata Model(Cont. 1)

Alina Liru Lu, NICTSlide 13

Submission

doc.: IEEE 11-12/0421

Revised Hata Model (Cont. 2)

Alina Liru Lu, NICTSlide 14