Distributed conformal adaptive antenna array for SATCOM using decision direction
AssigneeNorthrop Grumman Corporation
InventorDavid Keith Mesecher
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Abstract
An apparatus comprises a distributed array of antenna elements for receiving a radio frequency signal on a satellite communications link, wherein the radio frequency signal includes a known preamble; a plurality of mixers for translating the radio frequency signal to a plurality of baseband signals having in-phase and quadrature components; a processor for applying weights to the baseband signals, wherein the weights are found adaptively in response to the preamble in combination with decision-directed feedback when the preamble is not present; and a receiver for processing the weighted baseband signals. A pre-processor can be used to create sub-arrays of the antenna elements using maximal-ratio weighting. A method performed by the apparatus is also provided.
Claims10
An apparatus comprising:
- a distributed array of antenna elements for receiving a radio frequency signal on a satellite communications link, wherein the radio frequency signal includes a known preamble;
- a plurality of mixers for translating the radio frequency signal to a plurality of baseband signals having in-phase and quadrature components;
- a processor for applying weights to the baseband signals, wherein the weights are found adaptively in response to the preamble in combination with decision-directed feedback when the preamble is not present;
- and
- a receiver for processing the weighted baseband signals.
A method comprising the steps of:
- receiving a radio frequency signal using a distributed array of antenna elements, wherein the radio frequency signal includes a known preamble;
- translating the radio frequency signal to a plurality of baseband signals having in-phase and quadrature components;
- applying weights to the baseband signals, wherein the weights are found adaptively in response to the preamble in combination with decision-directed feedback when the preamble is not present;
- and
- processing the weighted baseband signals.
Dependencies are inferred from the claim text.