Patent ID: 8483609
Filing Date: 2013-07-09
Classification: H04B

Abstract:
1. A method for determining an effective isotropic radiated power (EIRP) adjustment for user terminals in a satellite communications system, the method comprising: determining a return uplink thermal noise estimate at a gateway, the return uplink thermal noise estimate determined at each of a plurality of different frequencies using total power measurements; obtaining a target return uplink signal density relative to thermal noise density based on end to end link characteristics and off-axis emissions from the user terminals; determining a target signal power at a gateway in the satellite communications system for one or more frequency channels, the target signal power based at least in part on the return uplink thermal noise and the target return uplink signal density relative to the thermal noise density; obtaining a message signal power at the gateway of one or more messages from a user terminal, the message signal power determined by a demodulator at the gateway; and determining the EIRP adjustment for the user terminal based at least in part on a difference between the target signal power and the message signal power.