Time reversal communication system
AssigneeLawrence Livermore National Security, LLC
InventorsJames V. Candy, Alan W. Meyer
Life of this patent
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Abstract
A system of transmitting a signal through a channel medium comprises digitizing the signal, time-reversing the digitized signal, and transmitting the signal through the channel medium. The channel medium may be air, earth, water, tissue, metal, and/or non-metal.
Claims51
A communication system apparatus for transmitting a transmitted signal through a channel medium wherein the channel medium may create channel distortions, comprising:
- a pilot signal transmitter adapted to transmit a pilot signal through the channel medium,
- a pilot signal receiver adapted to receive said pilot signal that has passed through the channel medium,
- a transmitter adapted to transmit the transmitted signal through the channel medium,
- a receiver adapted to receive the transmitted signal that has passed through the channel medium,
- a digitizer that digitizes the transmitted signal producing a digitized signal, and
- a point-to-point time-reversal signal processor adapted to time-reverse said digitized signal wherein said digitizer and said time-reversal signal processor utilize said pilot signal to remove the channel distortions from the transmitted signal.
A communication system apparatus for transmitting a transmitted signal through a channel medium wherein the channel medium may create channel distortions comprising:
- a pilot signal transmitter and a pilot signal receiver adapted to transmit a pilot signal through the channel medium,
- a pilot signal estimator for using said pilot signal for estimating a pilot signal passed through the channel medium producing an estimated pilot signal,
- a transmitter for transmitting the transmitted signal through the channel medium,
- a receiver for receiving the transmitted signal,
- a digitizer for digitizing the transmitted signal producing a digitized signal,
- a point-to-point time-reversal signal processor for time-reversing said digitized signal wherein said digitizer for digitizing the signal and said time-reversal signal processor for time-reversing said digitized signal utilize said estimated pilot signal to remove the channel distortions from the transmitted signal.
A communication method of transmitting a transmitted signal through a channel medium wherein the channel medium may create channel distortions, comprising the steps of:
- transmitting a pilot signal through the channel medium using a pilot signal transmitter and receiver,
- transmitting a transmitted signal through the channel medium using a transmitter and receiver,
- digitizing said transmitted signal producing a digitized signal,
- time-reversing said digitized signal creating a time-reversed signal, and
- transmitting said time-reversed signal through the channel medium, said step of transmitting said time-reversed signal through the channel medium including using said pilot signal to remove the channel distortions.
A communication method of transmitting a transmitted signal through a channel medium wherein the channel medium may create channel distortions, comprising the steps of:
- transmitting a pilot signal through the channel medium using a pilot signal transmitter and receiver,
- estimating an estimated pilot signal as it would be transmitted through the channel medium using said pilot signal,
- transmitting a transmitted signal through the channel medium using a transmitter and receiver,
- digitizing the transmitted signal producing a digitized signal,
- time-reversing said digitized signal creating a time-reversed signal, and
- transmitting said time-reversed signal through the channel medium wherein said estimated pilot signal is used to remove the channel distortions.
Dependencies are inferred from the claim text.