Electromagnetic/acoustic underwater communications system
First Claim
1. An underwater communications system comprising:
- an electromagnetic transmitter which transmits electromagnetic and/or magnetic signals to a remote receiver, an acoustic transmitter which transmits acoustic signals to said remote receivera data input and a device for selecting one of said electromagnetic transmitter and said acoustic transmittersaid electromagnetic transmitter comprising a modulator for modulating input data onto a carrier signalwherein at least one of said electromagnetic transmitter and said remote receiver is underwater.
4 Assignments
0 Petitions
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.
79 Citations
25 Claims
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1. An underwater communications system comprising:
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an electromagnetic transmitter which transmits electromagnetic and/or magnetic signals to a remote receiver, an acoustic transmitter which transmits acoustic signals to said remote receiver a data input and a device for selecting one of said electromagnetic transmitter and said acoustic transmitter said electromagnetic transmitter comprising a modulator for modulating input data onto a carrier signal wherein at least one of said electromagnetic transmitter and said remote receiver is underwater. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification