High bit-rate magnetic communication
AssigneeLockheed Martin Corporation
InventorsJames Michael Krause, Arul Manickam
Life of this patent
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Abstract
A magnetic communications transmitter includes a magnetic field generator and a controller. The magnetic field generator is configured to generate a magnetic field. The controller is configured to control the magnetic field generator by controlling an electrical current supplied to the magnetic field generator, and causing the magnetic field generator to generate an optimized variable amplitude triangular waveform.
Claims20
A magnetic communications transmitter, the transmitter comprising:
- a magnetic field generator configured to generate a vector magnetic field;
- and
- a controller configured to control the magnetic field generator,
- wherein:
- controlling the magnetic field generator comprises:
- controlling an electrical current supplied to the magnetic field generator, and
- causing the magnetic field generator to generate an optimized variable amplitude triangular waveform,
- wherein the controller is configured to encode active channel information in a portion of the generated vector magnetic field by modulating an amplitude of the optimized variable amplitude triangular waveform to form a MAX and an OFF symbol, the active channel information utilized by a receiver to determine an angle of arrival for the generated vector magnetic field and to demodulate the vector magnetic field by using a vector indicated by the MAX and OFF symbol of the active channel information of the optimized variable amplitude triangular waveform.
A magnetic communications receiver, the receiver comprising:
- a magnetic field sensor configured to sense a modulated magnetic field comprising multiple channels;
- and
- a signal processor configured to demodulate each channel of the multiple channels of the sensed modulated magnetic field,
- wherein:
- each channel of the modulated magnetic field comprises an optimized variable amplitude triangular waveform, the magnetic field sensor detecting a direction of a polarization of a B-field vector corresponding to a channel for a transmitter using a transmitted MAX and OFF symbol of the modulated magnetic signal, the signal processor configured to demodulate the channel of the sensed modulated magnetic field using the detected direction.
A method for facilitating magnetic communications, the method comprising:
- providing a magnetic field generator configured to generate a magnetic field;
- and
- providing a controller configured to control the magnetic field generator,
- wherein:
- the controller is configured to:
- control an electrical current supplied to the magnetic field generator, and
- cause the magnetic field generator to generate an optimized variable amplitude triangular waveform,
- wherein the controller is configured to encode active channel information in a portion of the generated vector magnetic field by modulating an amplitude of the optimized variable amplitude triangular waveform to form a MAX and an OFF symbol, the active channel information utilized by a receiver to determine an angle of arrival for the generated vector magnetic field and to demodulate the vector magnetic field by using a vector indicated by the MAX and OFF symbol of the active channel information of the optimized variable amplitude triangular waveform.
Dependencies are inferred from the claim text.