Diver communication system
First Claim
1. A diver communication system comprising a underwater communication system including:
- at least one transmitter and at least one remote receiver, said at least one transmitter comprising;
a data input;
a modulator, for modulating the input data onto a carrier signal;
an antenna for transmitting modulated electromagnetic and/or magnetic signals to a remote receiver, anda digital data compressor for compressing data that is to be transmitted, wherein said digital data compressor is configured to reduce occupied transmission bandwidth such as to increase the range of signal reception underwater; and
said at least one remote receiver comprising;
an antenna for receiving modulated electromagnetic and/or magnetic signals,wherein at least one of the transmitter and/or remote receiver is underwater.
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Accused Products
Abstract
An underwater communications system is provided that transmits electromagnetic and/or magnetic signals to a remote receiver. The transmitter includes a data input. A digital data compressor compresses data to be transmitted. A modulator modulates compressed data onto a carrier signal. An electrically insulated, magnetic coupled antenna transmits the compressed, modulated signals. The receiver that has an electrically insulated, magnetic coupled antenna for receiving a compressed, modulated signal. A demodulator is provided for demodulating the signal to reveal compressed data. A de-compressor de-compresses the data. An appropriate human interface is provided to present transmitted data into text/audio/visible form. Similarly, the transmit system comprises appropriate audio/visual/text entry mechanisms.
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Citations
19 Claims
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1. A diver communication system comprising a underwater communication system including:
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at least one transmitter and at least one remote receiver, said at least one transmitter comprising; a data input; a modulator, for modulating the input data onto a carrier signal; an antenna for transmitting modulated electromagnetic and/or magnetic signals to a remote receiver, and a digital data compressor for compressing data that is to be transmitted, wherein said digital data compressor is configured to reduce occupied transmission bandwidth such as to increase the range of signal reception underwater; and said at least one remote receiver comprising; an antenna for receiving modulated electromagnetic and/or magnetic signals, wherein at least one of the transmitter and/or remote receiver is underwater. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A diver communication system comprising an underwater communications system wherein said system comprises two or more transceivers, each transceiver comprising at least one transmitter and at least one receiver, said at least one transmitter comprising:
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a data input; a modulator, for modulating the input data onto a carrier signal; and an antenna for transmitting modulated electromagnetic and/or magnetic signals to a remote receiver, and said at least one receiver comprising; an antenna for receiving modulated electromagnetic and/or magnetic signals, wherein at least one transceiver is underwater and said transceiver is operable to communicate within a near field of said electromagnetic and/or magnetic signals, said near field corresponding to the region around the transmitter wherein at least one of inverse distance squared (1/r2) and inverse distance cubed (1/r3) field components of said electromagnetic and/or magnetic signals is greater than an inverse distance (1/r) field component thereof.
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Specification