Link Power Budgetting : Uplink Path Loss Calculation In Satellite Communications

Link Power Budgetting

1.Calculation of Uplink path loss

1. Up link frequency Up link frequency is frequency at which Ground Station is communicating with Satellite. For C band up link frequency is in the order of 6 G Hz

2. Up link path loss

Up link path loss depend on up link frequency & distance between satellite and ground station.

Here,

'd' is the distance between satellite & ground station

'f' is the frequency; C is the velocity of light

Example:Distance between satellite & earth station is 'd'= 37,000 Km

Up link frequency 'f'= 6.175 G Hz

uplink loss or free space loss= 10 log(4pi*37000*C/f)²

= 20 log(4pi*37000*C/f)

= 20log(4*pi*37000*3*108/f)

= 199.61 dB