MULTIPLATFORM SYSTEM AND METHOD FOR RANGING CORRECTION USING SPREAD SPECTRUM RANGING WAVEFORMS OVER A NETTED DATA LINK
First Claim
1. A multiplatform system comprising a plurality of networked nodes that communicate over a netted data link, wherein at least some of the nodes are configured to:
- transmit a coded waveform at one or more scheduled times for receipt by one or more of the other nodes;
correlate coded waveforms received from the other nodes to estimate a range to at least some of the other nodes; and
reset a navigational error and revise a trajectory based on the range estimates to the other nodes to avoid a possible collision with one or more of the other nodes.
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Accused Products
Abstract
Embodiments of a multiplatform system and method for ranging correction use spread-spectrum ranging waveforms over a netted data link. Each node may have a trajectory toward a target and may have a navigational error with respect to the trajectory. The nodes may transmit coded waveforms at one or more scheduled times for receipt by one or more of the other nodes during unused time slots on the netted data link. The nodes may correlate coded waveforms received from the other nodes to estimate a range to at least some of the other nodes. Each node may reset its navigational error and revise its trajectory based on the range estimates to the other nodes to avoid a possible collision with one or more of the other nodes.
16 Citations
30 Claims
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1. A multiplatform system comprising a plurality of networked nodes that communicate over a netted data link, wherein at least some of the nodes are configured to:
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transmit a coded waveform at one or more scheduled times for receipt by one or more of the other nodes; correlate coded waveforms received from the other nodes to estimate a range to at least some of the other nodes; and reset a navigational error and revise a trajectory based on the range estimates to the other nodes to avoid a possible collision with one or more of the other nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for revising a trajectory and resetting a navigational error of a node operating in a multiplatform system comprising a plurality of nodes, the method comprising:
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selecting a transmission schedule that identifies one or more scheduled times for transmission of a coded waveform; transmitting the coded waveform in accordance with the transmission schedule for receipt by one or more of the other nodes; correlating coded waveforms received from the other nodes to estimate a range to at least some of the other nodes; and resetting the navigational error and revising the trajectory based on the range estimates to the other nodes to avoid a possible collision with one or more of the other nodes. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A node configured to operate in a multiplatform system comprising a plurality of networked nodes that communicate over a netted data link, wherein the node comprises:
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timing and scheduling circuitry to schedule transmission of a coded waveform at one or more scheduled times for receipt by one or more of the other nodes; a parallel receiver to receive coded waveforms transmitted by one or more other nodes in accordance with a transmission schedule, the parallel receiver comprising a plurality of parallel correlators to correlate the coded waveforms received from the other nodes; a range calculator to estimate a range to at least some of the other nodes based on the correlations; and a navigational unit to reset a navigational error based on the range estimates to the other nodes and to revise a trajectory to avoid a possible collision with one or more of the other nodes. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification