JPL's Wireless Communication Reference Website
Chapter:
Wireless Channels
Section:
Multipath fading
,
Rayleigh fading
Time Constants of Rayleigh Fading
The
Doppler spread
incurred on a
Rayleigh fading channel
is determined by the vehicle speed and the carrier frequency. The
level crossing rate
, the
average fade and non-fade duration
also depends on the fade margin. The characteristics of the interference signal or noise floor also have a small influence.
Input parameters:
Carrier Frequency:
MHz
Speed:
meter/second
1 m/s = 3.6 km/h
Fade Margin:
dB
Characteristics of Interference:
WSS Noise
Many weak interferers
Stationary signal
One strong Rayleigh signal
2 i.i.d. Rayleigh signals
3 i.i.d. Rayleigh signals
4 i.i.d. Rayleigh signals
5 i.i.d. Rayleigh signals
6 i.i.d. Rayleigh signals
Run calculation:
Results:
Doppler spread:
Hz
Threshold crossing rate:
per second
Average fade duration:
second
Average nonfade duration:
second
JPL's Wireless Communication Reference Website
© 1999
Disclaimer: Executable software programmes are provided with no guarantee whatsoever. See
License
.
