Communications system
First Claim
1. A communications system comprising:
- a data input;
a modulator, for modulating data onto a carrier signal having a frequency selected to optimise bit rate transmission;
a transmitter, anda remote receiver,wherein the transmitter is provided with an antenna for transmitting modulated electromagnetic and/or magnetic signals to said remote receiver, the remote receiver is provided with an antenna for receiving modulated electromagnetic and/or magnetic signals and at least one of the transmitter and/or remote receiver is placed in a fluid propagating medium.
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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.
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Citations
20 Claims
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1. A communications system comprising:
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a data input; a modulator, for modulating data onto a carrier signal having a frequency selected to optimise bit rate transmission; a transmitter, and a remote receiver, wherein the transmitter is provided with an antenna for transmitting modulated electromagnetic and/or magnetic signals to said remote receiver, the remote receiver is provided with an antenna for receiving modulated electromagnetic and/or magnetic signals and at least one of the transmitter and/or remote receiver is placed in a fluid propagating medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification