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November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 1
doc.: IEEE 802.11-03/0884r0
Submission
Measured Rician K-factorin a 5GHz band
Naoki Kita, Yasuhiko Inoue, Shuji KubotaNTT
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 2
doc.: IEEE 802.11-03/0884r0
Submission
Measurement Apparatus
Sliding correlator
Center Frequency 5.2 GHz
PN Sequence length 1023
Chip rate 60 MHz
Modulation BPSK
Time Scaling Factor 6000
Time resolution 18.3 nsec
Tx / Rx Antennas
Horizontal Directivity Omni-directional
Gain 2.1 dBi
Polarization Vertical
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 3
doc.: IEEE 802.11-03/0884r0
Submission
Example
-110
-100
-90
-80
-70
-60
-50
5000 1 104 1.5 104 2 104 2.5 104 3 104
-70
-65
-60
-55
-50
-45
-40
0 1 2 3 4 5 6 7 8
Example of Measured Delay Snapshots & Data Treatment
・・・・・・
Relative delay time [nsec]
Rel
ativ
e le
vel [
dB]
Relative distance between BS and MS [m]
Rel
ativ
e le
vel [
dB]
0.01
0.1
1
-20 -15 -10 -5 0 5 10
MeasuredK = 5 dBK = 10 dBK = 15 dB
Cum
ulat
ive
Pro
babi
lity
Relative level [dB]
Picked Out
K 10 dB⋍
Example of acquired delay snapshots
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 4
doc.: IEEE 802.11-03/0884r0
Submission
Measurement Scenarios
Environment
Dimension (m)Tx / Rx
Antenna height
LOS NLOS
Apartment 2.8 * 8.4 * 2.5
2.8*3.6*2.5
(Another room divided
by concrete wall)
1.3 m / 1.3 m
Corridor 2.6 * 131 * 3 2.6 * 52 * 3
(Perpendicular course)
1.2 m / 2.8 m
Office 20 * 30 * 320 * 30 * 3
(Behind partition)1.0 m / 2.7 m
Meeting room 7 * 13 * 3 1.0 m / 2.7 m
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 5
doc.: IEEE 802.11-03/0884r0
Submission
Apartment
• LOS: in the same room• NLOS: the second neighboring room
Entrance
kitchen &dinning room
room#1
room#2
room#3bath
AP
STA
STA
NLOS case
LOS
NLOS
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 6
doc.: IEEE 802.11-03/0884r0
Submission
Measured Rician K-factor in the “Apartment” scenario
Apartment
-20 -15 -10 -5 0 5 100.1
1
10
100
MeasuredK = 6dBK = 7dBK = 8dB
NLOS
R.M.S Delay Spread
22 nsec
K - factor 7 dB
Relative level [dB]C
umul
ativ
e P
roba
bili
ty (
%) NLOSLOS
-20 -15 -10 -5 0 5 100.1
1
10
100
MeasuredK = 6dBK = 7dBK = 8dB
LOS
Relative level [dB]
Cum
ulat
ive
Pro
babi
lity
(%
)
R.M.S Delay Spread 11 nsec
K - factor 7 dB
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 7
doc.: IEEE 802.11-03/0884r0
Submission
Corridor
TxRxRxLOS case
Rx
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 8
doc.: IEEE 802.11-03/0884r0
Submission
Measured Rician K-factor in the “Corridor” scenario (1)
Corridor (LOS)
Far (90m-120m)Near ( 50m-90m)
-20 -15 -10 -5 0 5 100.1
1
10
100
90 120m~9dB10dB
LOS(Far)
Relative level [dB]C
umul
ativ
e P
roba
bili
ty (
%)
Relative level [dB]
Cum
ulat
ive
Pro
babi
lity
(%
)
R.M.S Delay Spread 283 nsec
K - factor 10 dB
R.M.S Delay Spread 216 nsec
K - factor 17 dB
-20 -15 -10 -5 0 5 100.1
1
10
100
MeasuredK = 16 dBK = 17 dBK = 18 dB
LOS(Near)
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 9
doc.: IEEE 802.11-03/0884r0
Submission
Measured Rician K-factor in the “Corridor” scenario (2)
Corridor (NLOS)
Relative level [dB]
Cum
ulat
ive
Pro
babi
lity
(%
)
R.M.S Delay Spread
158 nsec
K - factor 9 dB
-20 -15 -10 -5 0 5 100.1
1
10
100
MeasuredK = 8 dBK = 9 dBK = 10 dB
NLOS
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 10
doc.: IEEE 802.11-03/0884r0
Submission
Office
R.M.S Delay Spread 70 nsec
K - factor 8 dB
Relative level [dB]C
umul
ativ
e P
roba
bili
ty (
%) NLOSLOS( 15m-27m)
Relative level [dB]
Cum
ulat
ive
Pro
babi
lity
(%
)
R.M.S Delay Spread 49 nsec
K - factor 8 dB
Measured Rician K-factor in the “Office” scenario
-20 -15 -10 -5 0 5 100.1
1
10
100
Measured7dB8dB9dB
-20 -15 -10 -5 0 5 100.1
1
10
100
MeasuredK = 7dBK = 8dBK = 9dB
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 11
doc.: IEEE 802.11-03/0884r0
Submission
Meeting RoomLOS
Relative level [dB]
Cum
ulat
ive
Pro
babi
lity
(%
)
R.M.S Delay Spread 142 nsec
K - factor 10 dB
Measured Rician K-factor in the “Meeting Room” scenario
-20 -15 -10 -5 0 5 100.1
1
10
100
MeasuredK = 9 dBK = 10 dBK = 11 dB
November 2003
N.Kita, Y.Inoue and S.Kubota, NTTSlide 12
doc.: IEEE 802.11-03/0884r0
Submission
Summary of Measured Rician K-factor
EnvironmentK (dB)
LOS / NLOS
RMS delay Spread (ns)
LOS / NLOS
Correspondence model
LOS / NLOS
Apartment 7 / 7 11 / 22 B-LOS / C-NLOS
Corridor 17 (Near), 10(Far) / 9
216(Near), 283(Far) / 158 -- / F-NLOS
Office 8 / 8 49 / 70 D-LOS / D-NLOS
Meeting room 10 / -- 142 / -- D-LOS