1. Submission doc.: IEEE 11-12/0421 March 2012 Alina Liru Lu, NICTSlide 1 Outdoor Channel Models for 802.11af Date: 2012-03-14 Authors:

2. 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

3. Submission doc.: IEEE 11-12/0421 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 Alina Liru Lu, NICTSlide 3

4. 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 P16P5P4P1P3P6P15P2P7P14P8P13P12P11P10P9 Distance (km)1.41.51.61.8 2.72.83.24.76.17.79.612.313.615.616 RMS Delay Spread (µs) 0.610290.450.41.40.820.297.90.741.7920.612.210.98.46.517.8 Measure frequency 200MHz H b =45m H m =2m BS Power 20W Alina Liru Lu, NICTSlide 4

5. Submission doc.: IEEE 11-12/0421 RMS Delay Spread Month Year Slide 5 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 8.83µs Avg RMS delay 10.9µs

6. Submission doc.: IEEE 11-12/0421 Month 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.

7. Submission doc.: IEEE 11-12/0421 Okumura-Hata [3]Revised Hata [4]ITU-R P.1546-4 [5]ITU-R P.1812-1 [6] Frequency150 MHz to 1.5 GHz30MHz to 3GHz Transmission range 1 to 20 km<100km1 to 1000 km0.25 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 MediumHigh EnvironmentMid/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

8. Submission doc.: IEEE 11-12/0421 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 Alina Liru Lu, NICTSlide 8

9. 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 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. Alina Liru Lu, NICTSlide 9

10. 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

11. Submission doc.: IEEE 11-12/0421 Appendix Alina Liru Lu, NICTSlide 11

12. Submission doc.: IEEE 11-12/0421 Revised Hata Model Formulas for calculation of Median Path Loss Alina Liru Lu, NICTSlide 12

13. Submission doc.: IEEE 11-12/0421 Revised Hata Model(Cont. 1) Alina Liru Lu, NICTSlide 13

14. Submission doc.: IEEE 11-12/0421 Revised Hata Model (Cont. 2) Alina Liru Lu, NICTSlide 14