Patent ID: 9025591
Filing Date: 2015-05-05
Classification: H04B,H04L,H04W

Abstract:
1. A method for ground-based calibration of a satellite forward link, the method comprising: transmitting a plurality of orthogonal codes from a gateway to a satellite, wherein each of the plurality of orthogonal codes are received at a unique feed at the satellite; multiplexing the plurality of orthogonal codes into a linear combination of the plurality of orthogonal codes at the satellite; transmitting the linear combination of the plurality of orthogonal codes to a plurality of calibration earth stations over a plurality of feeds; receiving the linear combination of the plurality of orthogonal codes at at least one calibration earth station; and demultiplexing the linear combination of the plurality of orthogonal codes received at the at least one calibration earth station; and determining either or both of phase or amplitude shifts from the plurality of orthogonal codes.