CPC H04B 7/2041 (2013.01) [H04B 7/18513 (2013.01); H04L 5/0007 (2013.01); H04L 5/0048 (2013.01); H04W 88/16 (2013.01)] | 20 Claims |
1. A method for ground-based calibration of a satellite forward link, the method comprising:
transmitting a pseudo-noise (PN) code from a gateway to a satellite;
receiving the PN code from the gateway at the satellite;
transmitting the PN code from the satellite through a plurality of feeds to at least one calibration earth station, wherein the PN code is transmitted through each feed consecutively one after another;
receiving the PN code at the at least one calibration earth station; and
determining either or both of a phase shift or an amplitude shift of the PN code.
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