System and method for predictive link planning
AssigneeNorthrop Grumman Systems Corporation
InventorsJames M. Hetrick, Erin Yvonne Elissa Stewart Meadows
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Abstract
A system and method for predictive adaptive coding and modulation (ACM) is disclosed. Predictive ACM is used between a transmitting terminal that is in motion and a stationary receiving terminal without a return link between the terminals where the geometry and link impairments are known in advance. A system and method for predictive ACM in a system including one or more relay terminals between the transmitting and receiving terminals, where the geometry and link impairments between all of the terminals are known in advance is also disclosed.
Claims10
A method of transmitting data from a transmitting terminal to a receiving terminal over a channel, comprising the steps of:
- determining a series of locations for each of the receiving terminals and for exactly one transmitting terminal;
- determining a link geometry of the channel between the transmitting terminal and the receiving terminal for each location in the series of locations, wherein determining the link geometry comprises determining a distance between the transmitting and receiving terminals for each location in the series of locations;
- determining channel impairments for the link geometries by varying link parameters;
- using the link parameters as a priori information to maximize an instantaneous communication link rate between the receiving terminal and the transmitting terminal;
- predicting signal-to-noise ratios (SNRs) of the channel for the link geometries and the channel impairments;
- storing channel parameters based on the predicted SNRs in a lookup table;
- and
- transmitting data from the transmitting terminal using channel parameters retrieved from the lookup table, wherein the channel parameters are retrieved from the lookup table using the distance between the transmitting and receiving terminals.
Dependencies are inferred from the claim text.