Home page of Satellite Internet and Information

Satellite Internet Forum.

Welcome, Guest.
Welcome to this satellite broadband discussion forum. Wherever you are and whatever your problem we are here to help each other. Connecting to the internet via satellite is not always easy but is critically important to those in remote places or with poor terrestrial infrastructure. Both service providers and customers are encouraged to contribute. Register at the bottom of the forum home page if you wish to contribute or ask question. Read the Forum rules.
      Satellite Internet Forum : Home Page          
Pages: 1

VSAT adjacent satellite interference

(Read 3789 times)
Ex Member
Ex Member


Sep 13th, 2008 at 6:34pm  

How to calculate VSAT adjacent satellite interference?
Back to top
 
 
IP Logged
 
Eric Johnston
Senior Member
***
Offline


Personal text from Profile,
Options, Top line

Posts: 2108
Reply #1 - Sep 13th, 2008 at 10:54pm  
On the downlink, consider the off-axis receive gain sidelobe envelope of your receive earth station antenna towards several nearby satellites either way along the orbit.

In each case take the downlink eirp from that satellite towards you, within the bandwidth of interest, and work out what noise entry appears at the imput to your LNA.  Add up the total downlink adjacent satellite interference.

On the uplink you need access to the uplink earth station details of networks working to adjacent satellites.  In each case take the earth station transmitter powers into the feed (not eirp), per relevent bandwidth, and multiply by the off axis transmit gains of the other networks earth stations.  Add up all the interferences contributions into your uplink at the satellite.

Best regards, Eric.
Back to top
 
 
IP Logged
 
Pages: 1