Determining effective isotropic radiated power of a satellite communications system
First Claim
1. A method used on a satellite communication system, wherein the satellite communications system includes a satellite, at least one gateway terminal and a plurality of user terminals, the method comprising:
- measuring a total receive power of a signal received from the satellite under normal operating conditions;
measuring one of a signal-only power and a signal-to-noise-plus-interference ratio (SINR) for a signal received from the satellite under normal operating conditions;
measuring a total thermal noise component of the signal received from the satellite during a first quiet interval where uplink transmission from the at least one gateway and the plurality of user terminals have been disabled;
measuring a first out-of-band downlink thermal noise component and a first in-band downlink thermal noise component while the satellite is in a transmission disabled state;
determining a compensation factor using the first in-band downlink thermal noise component and the first out-of-band downlink thermal noise component;
measuring a second out-of-band downlink thermal noise component while the satellite is under normal operating conditions;
estimating a second in-band downlink thermal noise component of the signal received from the satellite by multiplying the second out-of-band downlink thermal noise component by the compensation factor; and
calculating satellite communication system operating parameters during satellite operation using the total receive power, the signal-only power or the SINR, measurements of the total thermal noise component, and the second in-band downlink thermal noise component for monitoring the performance of the satellite communication system in which the satellite is operating.
5 Assignments
0 Petitions
Accused Products
Abstract
Techniques for monitoring transmission performance of a satellite communications systems are provided, including techniques for measuring the primary contributors to the end-to-end SNR, including the uplink SNR, the downlink SNR, and the C/I for each link in the network. These individual measurements are used to estimate satellite effective isotropic radiated power (EIRP), satellite antenna gain-to-noise-temperature (G/T), and loss due to an Earth Terminal pointing error. The EIRP, satellite antenna G/T and loss due to Earth terminal pointing error may then be used to determine operating parameters for the satellite communications network that enable the network to operate more efficiently.
-
Citations
9 Claims
-
1. A method used on a satellite communication system, wherein the satellite communications system includes a satellite, at least one gateway terminal and a plurality of user terminals, the method comprising:
-
measuring a total receive power of a signal received from the satellite under normal operating conditions; measuring one of a signal-only power and a signal-to-noise-plus-interference ratio (SINR) for a signal received from the satellite under normal operating conditions; measuring a total thermal noise component of the signal received from the satellite during a first quiet interval where uplink transmission from the at least one gateway and the plurality of user terminals have been disabled; measuring a first out-of-band downlink thermal noise component and a first in-band downlink thermal noise component while the satellite is in a transmission disabled state; determining a compensation factor using the first in-band downlink thermal noise component and the first out-of-band downlink thermal noise component; measuring a second out-of-band downlink thermal noise component while the satellite is under normal operating conditions; estimating a second in-band downlink thermal noise component of the signal received from the satellite by multiplying the second out-of-band downlink thermal noise component by the compensation factor; and calculating satellite communication system operating parameters during satellite operation using the total receive power, the signal-only power or the SINR, measurements of the total thermal noise component, and the second in-band downlink thermal noise component for monitoring the performance of the satellite communication system in which the satellite is operating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification