infostations radio channel modeling a. domazetovic, l. j. greenstein, n. mandayam and i. seskar...
Post on 21-Dec-2015
213 views
TRANSCRIPT
INFOSTATIONS RADIO CHANNEL MODELING
A. Domazetovic, L. J. Greenstein,
N. Mandayam and I. SeskarOctober 29, 2001
WIRELESS INFORMATION NETWORK LABORATORY
Infostations-A system of sweet spots
Cellular systems Infostations - Power (>=1W) - Low power (~100mW) - Low bit rates - Very high bit rates - Connectivity always, - Brief connections (~seconds), everywhere localized- Narrowband - Wideband (e.g. UNII bands, 100MHz) - Large distances (~ km) - Short range (<20m)
WIRELESS INFORMATION NETWORK LABORATORY
Infostations-A system of sweet spots
Cellular systems Infostations - Power (>=1W) - Low power (~100mW) - Low bit rates - Very high bit rates - Connectivity always, - Brief connections (~seconds), everywhere localized- Narrowband - Wideband (e.g. UNII bands, 100MHz) - Large distances (~ km) - Short range (<20m)
WIRELESS INFORMATION NETWORK LABORATORY
W
z
dtr
aject
ory
Offset(1.5m)
Scenario 1: Open Roadway with Trees
WIRELESS INFORMATION NETWORK LABORATORY
Two types of Continuous Waveform measurements:
- Passing by the antenna- Fixed antenna positions
Two antenna types used:
- Omnidirectional (azimuth plane)- 120 deg. Directional (azimuth plane)
Measurements
WIRELESS INFORMATION NETWORK LABORATORY
W
z
d
traje
ctory
Offset(1.5m)
Scenario 1: Open Roadway with Trees
WIRELESS INFORMATION NETWORK LABORATORY
x
ej
Two-Ray Model for Scenario 1:
- log-normal process, dB approximately linearly increasing in distance
grsr
st LdEgrGgrGR /))()(( 00||
lossr
st LdElosGlosG /))()(( 00
/2 L
)cossin/()cossin( 22|| rrrrR
sr
st GandG - antenna gains in direction of rays
+
WIRELESS INFORMATION NETWORK LABORATORY
W
z
d
Offset(1.5m)
- Log-normal Process
WIRELESS INFORMATION NETWORK LABORATORY
WIRELESS INFORMATION NETWORK LABORATORY
WIRELESS INFORMATION NETWORK LABORATORY
WIRELESS INFORMATION NETWORK LABORATORY
WIRELESS INFORMATION NETWORK LABORATORY
Status
Performing measurements for other user
scenarios (streets, parking lots, entering the
building, …) Developing models for them (3-rays, 4-rays,
…) Further analysis of observed random
processes Assembling equipment for direct RF-pulse
channel sounding Performing direct RF-pulse measurements
WIRELESS INFORMATION NETWORK LABORATORY
Scenario 2: Road with Buildings on Each Side
Four ray propagation model
WIRELESS INFORMATION NETWORK LABORATORY