Method for enhancing the performance of a regenerative satellite communications system
First Claim
1. A method for enhancing the performance of a communications system in which an originating ground station produces error-control coded uplink signals and transmits the coded uplink signals to a satellite and in which a destination ground station receives a downlink beam transmitted by said satellite including the coded uplink signals, the method comprising the steps of:
- receiving uplink signals transmitted to a satellite by an originating ground station and transmitted by a satellite in a downlink beam to a destination ground station;
determining a downlink channel signal quality indication of said downlink beam at said destination ground station;
measuring an error rate associated with at least a portion of said uplink signals at said destination ground station;
determining an operating point relative to a desired performance curve based on said signal quality indication and said error rate;
adjusting at least an amount of error correction coding applied by said originating ground station to the uplink signal based on said operating point when said operating point lies in a predetermined region relative to said performance curve.
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0 Petitions
Accused Products
Abstract
A method for enhancing the performance of a communications system is disclosed. The system generally includes an originating ground station (300) which produces error-control coded uplink signals and transmits the coded uplink signals to a satellite (310). The system also includes a destination ground station (326) which receives a downlink beam from the satellite (310). The method includes the steps of receiving uplink signals transmitted by an originating ground station (300) at a destination ground station (326) and determining a downlink channel signal quality indication (504) at the destination ground station (326). The method also includes the steps of measuring an error rate associated with at least a portion of a downlink beam at said destination ground station (326) and determining an operating point (506) relative to a desired performance curve (502) based on the signal quality indication (504) and the error rate. At least one signal processing parameter of said originating ground station (300) is adjusted based on the operating point (506) when said operating point (506) lies in a predetermined region relative to the performance curve (502).
171 Citations
17 Claims
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1. A method for enhancing the performance of a communications system in which an originating ground station produces error-control coded uplink signals and transmits the coded uplink signals to a satellite and in which a destination ground station receives a downlink beam transmitted by said satellite including the coded uplink signals, the method comprising the steps of:
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receiving uplink signals transmitted to a satellite by an originating ground station and transmitted by a satellite in a downlink beam to a destination ground station; determining a downlink channel signal quality indication of said downlink beam at said destination ground station; measuring an error rate associated with at least a portion of said uplink signals at said destination ground station; determining an operating point relative to a desired performance curve based on said signal quality indication and said error rate; adjusting at least an amount of error correction coding applied by said originating ground station to the uplink signal based on said operating point when said operating point lies in a predetermined region relative to said performance curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for controlling, in a communications system, signal quality of at least one of an uplink and a downlink between a satellite and ground stations, comprising:
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transmitting error correction coded data in a communications signal over a downlink between a satellite and ground station; measuring a signal quality of the received communications signal transmitted over said downlink between the satellite and ground station; and changing an amount of error correction coding applied to data in said communications signal transmitted by an originating ground station based on the measured signal quality. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification