×

Return link design for PSD limited mobile satellite communication systems

  • US 7,054,593 B2
  • Filed: 06/19/2001
  • Issued: 05/30/2006
  • Est. Priority Date: 09/28/2000
  • Status: Active Grant
First Claim
Patent Images

1. A method for managing radio frequency (RF) transmissions from an RF system of at least one mobile platform operating within a predetermined coverage region to a space-based transponder orbiting within said coverage region, in a manner to maintain a signal-to-noise ratio (Eb/No) of said RF transmissions within a predetermined range, the method comprising the steps of:

  • using a first control loop to monitor, by a central controller, a signal-to-noise ratio of said RF transmissions from said mobile platform that are received by said satellite transponder, and to transmit first power correction commands to said mobile platform via said satellite transponder for maintaining said signal-to-noise ratio of said RF transmissions from said mobile platform to within a predetermined range; and

    using a second control loop including a mobile system of said mobile platform to monitor and further adjust a power level of said RF transmissions from said mobile platform to said satellite transponder, inbetween receipt of said commands from said central controller, by transmitting second power correction commands to said mobile platform, to maintain said power level of said RF transmissions from said mobile platform at a level previously commanded by said first power correction commands, inbetween receipt of updated power correction command signals from said central controller.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×