Water based vehicle communications system
First Claim
1. A water based vehicle communications system comprising at least one water based vehicle provided with a transmitter at least, and at least one station provided with a receiver at least, wherein said transmitter comprises:
- a data input representative of image data at least;
a modulator, for modulating the input data onto a carrier signal; and
an antenna for transmitting modulated electromagnetic and/or magnetic signals, andsaid at least one receiver comprising;
an antenna for receiving modulated electromagnetic and/or magnetic signals,wherein said water based vehicle and station are operable to communicate when at least one of said water based vehicle and station is partially immersed in water; 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.
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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.
38 Citations
20 Claims
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1. A water based vehicle communications system comprising at least one water based vehicle provided with a transmitter at least, and at least one station provided with a receiver at least, wherein said transmitter comprises:
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a data input representative of image data at least; a modulator, for modulating the input data onto a carrier signal; and an antenna for transmitting modulated electromagnetic and/or magnetic signals, and said at least one receiver comprising; an antenna for receiving modulated electromagnetic and/or magnetic signals, wherein said water based vehicle and station are operable to communicate when at least one of said water based vehicle and station is partially immersed in water; 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. - 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. An water based vehicle communications system operable to allow communication between an water based vehicle and a station, each of which is provided with at least one transceiver, each said transceiver comprising a transmitter and a receiver where each said transmitter includes:
- 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 a digital data compressor for compressing said data at least 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 under water; and
each receiver comprising;
an antenna for receiving modulated electromagnetic and/or magnetic signals, wherein said water based vehicle and station are operable to communicate when at least one of said water based vehicle and station is partially immersed in water.
- a data input;
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20. A water based vehicle communications system comprising at least one water based vehicle provided with a transmitter at least, and at least one station provided with a receiver at least, wherein said transmitter comprises:
- a data input representative of image data at least;
a modulator, for modulating the input data onto a carrier signal; and
an antenna for transmitting modulated electromagnetic and/or magnetic signals, and said at least one 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 and said transmitter and said receiver are 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.
- a data input representative of image data at least;
Specification