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:

Run calculation:



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.