Outdoor channel models for 802 11af
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Outdoor Channel Models for 802.11af. Authors:. Date: 2012-03-14. 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.

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Outdoor Channel Models for 802.11af

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Outdoor channel models for 802 11af

Alina Liru Lu, NICT

Outdoor Channel Models for 802.11af

Authors:

  • Date: 2012-03-14


Abstract

Alina Liru Lu, NICT

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.


Proposed channel models

Alina Liru Lu, NICT

Proposed Channel Models

  • The following three aspects will be covered in this presentation

    • RMS Delay Spread

    • Path Loss Model

    • Channel Impulse Response Profile

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


Rms delay spread

Alina Liru Lu, NICT

Table 1

RMS Delay Spread

Measure frequency 200MHz

Hb=45m

Hm=2m

BS Power 20W

Table 2 [2]

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.

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


Rms delay spread1

RMS Delay Spread

Avg RMS delay 8.83µs

Avg RMS delay 10.9µs

Avg RMS delay 1.52µs

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


Outdoor channel models for 802 11af

Alina Liru Lu, NICT

RMS Delay Spread

[2]

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

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


Path loss model

Alina Liru Lu, NICT

Path Loss Model

Revised Hata model is recommended based on the above comparison

[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.


Channel impulse response model 1

Alina Liru Lu, NICT

Channel 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


Summary

Alina Liru Lu, NICT

Summary

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

  • The proposed Channel Models covers

    • RMS Delay Spread

    • Path Loss Model

    • Channel 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.


References

Alina Liru Lu, NICT

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.


Appendix

Alina Liru Lu, NICT

Appendix


Revised hata model

Alina Liru Lu, NICT

Revised Hata Model

Formulas for calculation of Median Path Loss


Revised hata model cont 1

Alina Liru Lu, NICT

Revised Hata Model(Cont. 1)


Revised hata model cont 2

Alina Liru Lu, NICT

Revised Hata Model (Cont. 2)


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