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| Number | Title | Issue Date |
| 8102733 | Communicating using sonar signals at multiple frequencies An embodiment of an apparatus includes a communication circuit and a transducer array coupled to the communication circuit. The communication circuit is operable to generate first and second information signals, and the transducer array is operable to generate in re... | 01/24/2012 |
| 8094518 | Inter-diver signaling device and process Taps on a beam-interrupt button of an underwater signaling transceiver are encoded as binary frequency shift-key modulated Golay codes, which are transmitted via 56-58 kHz compression waves generated by a ring-shaped electromechanical transducer. Light emitting diod... | 01/10/2012 |
| 8009517 | Wireless communication system, transmitting device, receiving device and information processing apparatus A wireless communication system includes a transmitting device and a receiving device, in which the transmitting device generates a signal including information and transmits the signal by electromagnetic waves and ultrasonic waves in the same frequency in parallel,... | 08/30/2011 |
| RE42218 | 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 receiver assembly (16), carried by a mas... | 03/15/2011 |
| 7872947 | System and method for underwater wireless communication An underwater wireless communication system and method includes a sensor node for transforming measured underwater data into ultrasound signals, and transmitting the transformed ultrasound signals and receiving other ultrasound signals. ... | 01/18/2011 |
| 7872946 | Autonomous waterproof electronic signaling device The autonomous waterproof electronic signaling device disclosed comprises an activator; a signal emitter, said signal emitter to emit a primary signal upon activation of said activator, said signal emitter comprising one or more of the following: a hydrophone, a sir... | 01/18/2011 |
| 7859944 | Apparatus, systems and methods for enhanced multi-carrier based underwater acoustic communications Advantageous OFDM-based underwater acoustic (UWA) apparatus, systems and methods are provided according to the present disclosure. In general, OFDM transmissions over UWA channels encounter frequency-dependent Doppler drifts that destroy the orthogonality among OFDM... | 12/28/2010 |
| 7835228 | Modem and method for transmitting data in a medium notably such as air and water A method for transmitting data is disclosed having the following steps: emitting packets of at least two types: pure data (long packets) and acknowledgments of receipt (acknowledgment) (short packets). Each packet is formed of three components: a—an acquisition pr... | 11/16/2010 |
| 7688680 | Systems and methods for visual light communication in an underwater environment Systems and methods for visual light communication in an underwater environment are provided. The system can include a master control station that determines an amount of impairment of a water medium and selects one of a wired and wireless communication transceiver ... | 03/30/2010 |
| 7613074 | Non-linear optoacoustic narrowband communications technique The present invention includes a system and method of use for communications from an in-air platform to a submerged platform. The system includes a laser positionable on the in-air platform above a water medium that sends a pulsed information-bearing laser beam cont... | 11/03/2009 |
| 7512037 | Method and apparatus for acoustic system having a transceiver module An acoustic method and apparatus for an acoustic system use a transceiver module, which can transmit to a transmit acoustic element of a transmit sonar array and receive from a receive acoustic element of a receive sonar array in accordance with a common transmit/re... | 03/31/2009 |
| 7505366 | Method for linear optoacoustic communication and optimization The present application provides a linear mechanism for optical-to-acoustic energy conversion for optoacoustic communication from an in-air platform to an undersea vehicle. Signals used in underwater acoustic telemetry applications are capable of being generated thr... | 03/17/2009 |
| 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 high bandwidth data transmission. Reliability is improved in comparis... | 03/17/2009 |
| 7505367 | System and method for using acoustic field parameters for communication A system and a method for conveying data using the vector components of the acoustic field, in addition to the scalar component is described. Receivers capable of determining the transmitted data values by measuring one or more parameters of an acoustic field are ut... | 03/17/2009 |
| 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 floatable on the body of water. The communications module is mounted on and/o... | 02/24/2009 |
| 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 circular cylindrical body containing one or more rigid spheres inside,... | 12/16/2008 |
| 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 for receiving and detecting a Doppler-sensitive probe signal and trai... | 11/04/2008 |
| 7394724 | System for detecting, tracking, and reconstructing signals in spectrally competitive environments A system applicable to acoustic, seismic, electromagnetic, hydrodynamic, and shock waves utilizing a map between signal time series and signal vectors defining the mathematical wave field model characterizing the signal's wave field. This map is developed from wave ... | 07/01/2008 |
| 7369833 | Method and apparatus for improving the directivity of an antenna A receive system, including special integrated circuits, for providing enhanced directivity in the form of a narrowed receive beam and a relatively small antenna with performance comparable to a much larger antenna at similar frequencies. Received signals are conver... | 05/06/2008 |
| 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 method of the invention includes the steps of initiating an exchange of b... | 04/22/2008 |
| 7362654 | System and a method for detecting the direction of arrival of a sound signal The disclosed invention is a highly reliable cost effective sound direction detection system. In the preferred embodiment of the invention the system comprises a device which includes two microphones set at a spread of at lease 5 cm from each other, a digital signal... | 04/22/2008 |
| 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 and to generate detonation signals based upon the processed receive li... | 04/22/2008 |
| 7349481 | Communication using audible tones An apparatus and method for communication using sound waves is disclosed. More particularly, orthogonal frequency division multiplexing scheme is used to transmit and receive digital data on sound waves. In one embodiment, the sound waves are used to exchange inform... | 03/25/2008 |
| 7343261 | Underwater sensor transmitter probe An electronic apparatus for measuring water speed and water temperature then periodically transmitting said data during controlled depth fishing wherein an underwater probe is secured to and insulated conductive downrigger cable and gathers and relays data though th... | 03/11/2008 |
| 7335077 | Man overboard detection and rescue system A system detects a man overboard and facilitates the rescue of the overboard individual. The system includes sensors that provide surveillance of a peripheral envelope of a boat to detect when an individual fall through the envelope. When an individual is detected f... | 02/26/2008 |
| 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 event, and issues an alert that such an event is in progress. Device is op... | 02/12/2008 |
| 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 liquid environment. The network provides the capability of sensing the... | 01/15/2008 |
| 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 continuous pilot signal at a frequency closely adjacent to the freque... | 12/18/2007 |
| 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 signal, the first processing unit being coupled to a digital to analog co... | 12/11/2007 |
| 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 accessible from the exterior thereof. The first set of alarm devices, def... | 11/20/2007 |
| 7291936 | Submersible electrical power generating plant A self-supporting, submersible generating plant for producing electricity from ocean currents, consisting of two counter-rotating, rear-facing turbines with a plurality of rotor blades extending radially outward from two separate horizontal axis that convey the kine... | 11/06/2007 |
| 7280070 | Robust optimal shading scheme for adaptive beamforming with missing sensor elements A new technique for re-computing shading parameters for low sidelobe levels for a radar or sonar system is disclosed. When some of the sensor elements become inoperative, remaining shading parameters are recomputed using a new constraint. This approach leads to an o... | 10/09/2007 |
| 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 processed as encoded data and the encoded data is stored as a data frame... | 09/11/2007 |
| 7269234 | Arrangement for dynamic DC offset compensation A digital arrangement for selecting a channel coefficient and DC estimate comprises a demultiplexer receiving a digital input signal splitting the digital input signal into a first and second signal, a first joint detection unit receiving the first signal generating... | 09/11/2007 |
| 7264057 | Subsea intervention A method and system of subsea intervention comprises lowering one or more assemblies of intervention equipment into the sea. Underwater marine units (such as remote operated vehicles or small submarines) may be employed to connect the assemblies to each other and to... | 09/04/2007 |
| 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 submarine via a cable that has communication lines in it. The sensor may be... | 06/12/2007 |
| 7226180 | Pair of shining swimming goggles A pair of shining swimming goggles comprises a pair of swimming goggles, a shining module and an electric conducting portion. The shining module is embedded in an inner portion of the swimming goggles. The electric conducting portion is disposed on a surface of the ... | 06/05/2007 |
| 7218612 | Network synchronization A network arrangement uses a poll select control protocol and a loop back arrangement at each node for equalizing transmission delay from each node to a central station. Delays at each node can be adjusted to start timing in response to a broadcast signal indicating... | 05/15/2007 |
| 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 the communication system. The method of the invention is implemented ... | 05/15/2007 |
| 7209529 | Doppler compensated receiver A receiver includes a controller which receives A/D sampled input signals and shifts the sampled digital signal to compensate for Doppler effect in the input signal prior to demodulation. The controller compensates for a Doppler increased frequency by shifting the s... | 04/24/2007 |
