Patent ID: 6763006
Filing Date: 2004-07-13
Classification: H04B,H04W

Abstract:
A method for controlling uplink power transmission of an earth station within a satellite communication network, wherein said satellite communication network includes a satellite and at least one earth station, said method comprising:measuring a received power of a beacon signal transmitted by a satellite; measuring a received power of a downlink signal that corresponds to an uplink signal from an earth station to said satellite; calculating an uplink fade of said earth station based on said measured downlink signal power and said measured beacon signal power, wherein said calculating is performed by Gc[Linkc+n/nâ€”requiredâˆ’(Linkc+nâ€”presentâˆ’Refnâ€”present+&Dgr;n)+Gcâ€”previous]âˆ’downlink fade â€ƒwhere Gc=gain applied to a control station's uplink Linkc+nâ€”required=required downlink control station's carrier c+n/n (results of link budget calculation for clear sky condition) Linkc+nâ€”present=control station's downlink carrier level (c+n) measured at the control station &Dgr;n=difference between the noise floor of beacon frequency and the control station's downlink carrier frequency (gain slope of control station receive system) Gcâ€”previous=gain setting when the calculation was previously performed (initially set to zero); and instructing said earth station to adjust an uplink gain value to compensate for uplink attenuation according to said calculated uplink fade value.