Matches 51 - 100 out of 255 < 1 2 3 4 5 6 >


Match Document Document Title
7505365 Lorentz acoustic transmitter for underwater communications  
Described is a device for generating an acoustic signal in an electrically conductive medium such as salt water. The device of the present invention has a broadband frequency response and supports...
7496000 Water submersible communications devices and methods for using the same  
A water submersible communications device for use on a body of water includes a housing and a communications module. The housing has a geometric centroid. The housing is submersible in and...
7466629 Manually agitated underwater signaling device  
A Manually Agitated Underwater Signaling Device used for SCUBA divers, snorkelers and other water-sport enthusiasts. The Manually Agitated Underwater Signaling Device includes a water tight right...
7447117 Correlation based decision-feedback equalizer for underwater acoustic communications  
An underwater communications system includes an antenna array, a sound transmission source for transmitting communication packets, and a receiver including a processor. The processor is programmed...
7362653 Underwater geopositioning methods and apparatus  
A method and apparatus for determining the geophysical position of an autonomous underwater system utilizing underwater acoustic modems that exchange broadband underwater acoustic signals. The...
7362657 Aquatic object detection and disruption system  
A system includes a receive line array that generates one or more receive line array signals, a processor operatively connected to the receive line array to process the receive line array signals...
7330123 Sonar based drowning monitor  
Low-cost, reliable, easy to use device and method identifies potential drowning or near-drowning events (i.e. a submerged inert human) in a timely manner, provides the precise location of the...
7319411 Network of sensor nodes assemblies and method of remote sensing within liquid environments  
A network of remote sensing node assemblies, a first and second of which each has a sensor element, as well as associated technique and program code for transmitting information collected about a...
7310286 System for undersea digital acoustic communications  
An undersea communications system in which a message is converted to a redundant fixed-length data packet and transmitted acoustically as a quadrature phase-keyed signal in a frequency band with a...
7307915 Seismic modem  
A system for the transmission of data by seismic wave, the system having at least one transmitting unit, that at least one transmitting unit comprising a first processing unit encoding a first...
7298277 Depth monitoring and alert system  
A system is provided for monitoring one or more depth associated parameters of an object submerged in water. A first set of alarm devices are mounted in the system's housing such that they are...
7269097 Method for recovering data from a large array of lost-cost sensors  
The present invention provides a system and method of use for recovering data from an area. The data are gathered with at least one sensor converting the data to a digital packet. The packet is...
7230881 Submarine remote surface platform  
A platform with a sensor is for coupling to a submarine or other underwater vehicle and for sending data about the seascape to the submarine. In an embodiment, the platform is coupled to the...
7218574 High range rate signaling  
An underwater communications method and apparatus is provided for demodulating communications signals while compensating for the effects of range rate, i.e., relative velocity between the nodes of...
7164622 Acoustic propagation delay measurements using transmission of known broad bandwidth waveforms  
A system and method in which one or more acoustic projectors transmit broad bandwidth waveforms having known characteristics, and one or more acoustic receivers detect the transmitted waveforms,...
7027357 Acoustic communication device and acoustic signal communication method  
The present invention provides an acoustic transmitter for sequentially transmitting a plurality of pulse signals by sound. Each of the plurality of pulse signals is a signal of at least one...
7021146 Attitude sensor  
The present invention provides an attitude sensing device and method for determining an attitude of a reference axis of a package containing a fiber optic sensor sensor. The attitude sensing...
7006407 Communication system for underwater use  
For digital underwater transmission an information sequence (17) of digital bits is partitioned into a succession of symbols each comprising n bits where n is equal to or greater than one (2n...
6980487 Underwater communication system  
In a digital acoustic transmission device in which a digital sequence (31) is electrically modulated (22) on a carrier cos ωt, the modulated carrier (23) is prefaced with at least two pulse...
6920193 Wireless receiver using noise levels for combining signals having spatial diversity  
A wireless receiver for receiving an incoming signal having spatial and temporal diversity. The receiver uses noise-based prescaling of multiple receiver chain signals for optimally combining the...
6909759 Wireless receiver using noise levels for postscaling an equalized signal having temporal diversity  
A wireless receiver for receiving an incoming signal having spatial and temporal diversity. The receiver uses noise-based prescaling of multiple receiver chain signals for optimally combining the...
6859419 Laser-based acousto-optic uplink communications technique  
An apparatus for enabling acousto-optic communication comprising an in-water platform comprising means for emitting an acoustic signal to an acousto-optic interaction zone, an in-air platform...
6856578 Underwater alert system  
In a first preferred embodiment, an underwater alert system (10) includes a transmitter assembly (12), carried by a first diver (14), that transmits a predetermined wireless signal (36) to a...
6819630 Iterative decision feedback adaptive equalizer  
The present invention provides a receiver for underwater acoustic telemetry which combines a decision feedback adaptive equalizer structure with a modified turbo-equalizer structure. The modified...
6813219 Decision feedback equalization pre-processor with turbo equalizer  
The present invention provides a receiver for underwater acoustic telemetry which combines a decision feedback adaptive equalizer structure with a turbo-equalizer structure. The turbo-equalizer...
6813218 Buoyant device for bi-directional acousto-optic signal transfer across the air-water interface  
A buoy system bi-directionally communicates in-air and underwater. A buoy having a shell to float on water has an upper portion in air and a lower portion in water. An array of acoustic...
6711095 Expenable/recoverable voice and data communications system buoy  
An untethered communications buoy system has an untethered buoy freely floating on the surface of water to not compromise the location of the submersible. The submersible has a cavity containing a...
6690619 Underwater communication device  
An underwater communication device in combination with a chemiluminescent glow stick. The combination comprises a rigid housing having a seat structure for receiving a chemiluminescent glow stick...
6687188 Underwater telemetry apparatus and method  
An apparatus for phase coherent underwater communications includes a transmitter; a receiver, including a processor for jointly performing coherent diversity combining, carrier recovery, channel...
6625084 System for acoustically passing electrical signals through a hull  
A system is disclosed that allows passage of electrical signals across a rigid boundary, such as a pressure hull of a submarine or vessel that operates in water. The passages provided by acoustic...
6512720 Underwater telemetry method using doppler compensation  
A method for Doppler compensation in a phase coherent underwater communications system includes the steps of receiving a communications signal from a plurality of underwater communications...
6392960 Acoustic communication of coded multi-channel digital messages in a liquid medium  
A device for acoustic communication of coded multi-channel digital messages in a liquid medium. The device is designed to use a single carrier frequency and includes the use of acoustic...
6327220 Sonar location monitor  
A system is disclosed for locating swimmers who could be in danger of drowning, as determined by preset parameters such as the time duration that they remain at a depth where breathing is...
6295312 Time diversity transmission for multichannel adaptive equalization  
A method and system are provided for communicating in a time-varying medium. A transmitter sends transmissions of the same message data separated in time with respect to one another. A single...
6272072 Underwater communication method, device, and system utilizing a doppler frequency shift  
An underwater communication method, device, and system that enables bi-directional communication between and among under-water divers. In accordance with the present invention, messages may be...
6220168 Underwater intelligence gathering weapon system  
An underwater intelligence gathering weapon system accurately places a weapon underwater and then communicates therewith from other platform(s). The weapon is equipped to maneuver through the air...
6215732 Expendable device for measurement of sound velocity profile  
A system for determining the sound velocity profile in a medium, such as water, includes an acoustic signal transmitting system at a transmitting location and an acoustic signal receiving and...
6177882 Electromagnetic-to-acoustic and acoustic-to-electromagnetic repeaters and methods for use of same  
A downhole communications system including an electromagnetic-to-acoustic signal repeater (35) for communicating information between surface equipment and downhole equipment and a method for use...
6130859 Method and apparatus for carrying out high data rate and voice underwater communication  
An underwater apparatus for transmitting and receiving high rate data and voice communication including a transmitter, a receiver, and a Doppler frequency shift compensator. The transmitter...
6127942 Ultrasonic power sensory system  
A system includes a first transducer and a second transducer coupled together through a coupling medium communicating undulating pressure wave from the first transducer to the second transducer...
6125080 Underwater communication apparatus and communication method  
A personal underwater communication device which comprises: A display; A memory unit for storing a plurality of preset messages, each message being assigned a common message identification code;...
6118732 Secure marine communication system  
This invention relates to a secure marine communication system and especiy to a sonic communication system utilizing the so-called "sound channel" in the ocean deeps.The propagation of sound in...
6058071 Magneto-inductive submarine communications system and buoy  
A magneto-inductive submarine communication system and buoy provide two-way signal communications between a submerged craft, such as a submarine and remote command station that may be airborne, on...
6052336 Apparatus and method of broadcasting audible sound using ultrasonic sound as a carrier  
An ultrasonic sound source broadcasts an ultrasonic signal which is amplitude and/or frequency modulated with an information input signal originating from an information input source. If the...
6018501 Subsea repeater and method for use of the same  
A subsea repeater apparatus (48) for communicating information between surface equipment (60) and downhole equipment (44) is disclosed. The apparatus (48) comprises an electromagnetic receiver...
5982297 Ultrasonic data communication system  
A system includes a first transducer and a second transducer coupled together through a coupling medium communicating input and output undulating pressure waves between the first and second...
5978316 Marine seismic source  
A seismic acoustic signal source includes a hull that has a wetted surface in contact with a body of water. When underway, the draft of the hull is substantially zero. An acoustic signal generator...
5956291 Underwater diving assistant apparatus  
An underwater diving assistant device. In one embodiment, the present invention comprises a hand-held unit including a display screen. Messages and drawings are written on the display screen using...
5894450 Mobile underwater arrays  
An oceanographic sampling system includes two or more underwater vehicles disposed in an array and an array controller for controlling the array of underwater vehicles as data is acquired. Each...
5792950 Submarine deployed sea-state sensor  
A submarine deployed sea-state sensor comprises an elongated housing having nose cone and an aft end, the housing having a forward buoyant chamber for receiving an accelerometer. Aft of the...

Matches 51 - 100 out of 255 < 1 2 3 4 5 6 >