1. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 1 Measured Rician K-factor in a 5GHz band Naoki Kita, Yasuhiko Inoue, Shuji Kubota NTT nkita@ansl.ntt.co.jp yinoue@ansl.ntt.co.jp kubota@ansl.ntt.co.jp

2. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 2 Overview We derived Rician K-factor by: –measuring the radio wave in some environments, apartment corridor office meeting room –processing the output of the sliding correlator, –comparing with the cumulative distribution of the first delay wave component with the theoretical Rician distribution.

3. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 3 Measurement Apparatus Sliding correlator Center Frequency5.2 GHz PN Sequence length1023 Chip rate60 MHz ModulationBPSK Time Scaling Factor6000 Time resolution18.3 nsec Tx / Rx Antennas Horizontal DirectivityOmni-directional Gain2.1 dBi PolarizationVertical

4. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 4 Example Example of Measured Delay Snapshots & Data Treatment Relative delay time [nsec] Relative level [dB] Relative distance between BS and MS [m] Relative level [dB] Cumulative Probability Relative level [dB] Picked Out K 10 dB Example of acquired delay snapshots

5. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 5 Measurement Scenarios Environment Dimension (m) Tx / Rx Antenna height LOSNLOS Apartment2.8 * 8.4 * 2.5 2.8*3.6*2.5 (Another room divided by concrete wall) 1.3 m / 1.3 m Corridor2.6 * 131 * 32.6 * 52 * 3 (Perpendicular course) 1.2 m / 2.8 m Office20 * 30 * 3 (Behind partition) 1.0 m / 2.7 m Meeting room7 * 13 * 31.0 m / 2.7 m

6. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 6 Apartment LOS: in the same room NLOS: the neighboring room AP kitchen & dinning room STA room#1 room#2 room#3 STA Ent- rance room#4 LOS NLOS 8.4 m

7. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 7 Measured Rician K-factor in the Apartment scenario Apartment R.M.S Delay Spread 22 nsec K - factor7 dB Relative level [dB] Cumulative Probability (%) NLOS LOS Relative level [dB] Cumulative Probability (%) R.M.S Delay Spread11 nsec K - factor7 dB

8. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 8 Corridor Tx Rx LOS conditions Rx 131 m 36 m 69 m 52 m 34 m NLOS conditions

9. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 9 Measured Rician K-factor in the Corridor scenario (1) Corridor (LOS) Far (90m-120m) Near 50m-90m Relative level [dB] Cumulative Probability (%) Relative level [dB] Cumulative Probability (%) R.M.S Delay Spread283 nsec K - factor10 dB R.M.S Delay Spread216 nsec K - factor17 dB

10. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 10 Measured Rician K-factor in the Corridor scenario (2) Corridor (NLOS) Relative level [dB] Cumulative Probability (%) R.M.S Delay Spread 158 nsec K - factor9 dB

11. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 11 Office R.M.S Delay Spread70 nsec K - factor8 dB Relative level [dB] Cumulative Probability (%) NLOS LOS 15m-27m) Relative level [dB] Cumulative Probability (%) R.M.S Delay Spread49 nsec K - factor8 dB Measured Rician K-factor in the Office scenario

12. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 12 Meeting Room LOS Relative level [dB] Cumulative Probability (%) R.M.S Delay Spread142 nsec K - factor10 dB Measured Rician K-factor in the Meeting Room scenario

13. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 13 Summary of Measured Rician K-factor Environment K (dB) LOS / NLOS RMS delay Spread (ns) LOS / NLOS Correspondence model LOS / NLOS Apartment7 / 711 / 22B-LOS / C-NLOS Corridor17 (Near), 10(Far) / 9216(Near), 283(Far) / 158-- / F-NLOS Office 8 / 8 49 / 70D-LOS / D-NLOS Meeting room10 / --142 / --D-LOS Conclusion Rician K-factor values for LOS conditions: 7 – 10 [dB] Rician K-factor values for NLOS conditions are similar to those of LOS conditions. More measurements will be necessary to derive a typical value.

14. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 14 Environment Apartment (room#2) Corridor (LOS) Office Meeting room

15. doc.: IEEE 802.11-03/0884r1 Submission November 2003 N.Kita, Y.Inoue and S.Kubota, NTT Slide 15 Thank you very much!