Using Radiating Transmission Line Patents (Class 455/523)
  • Patent number: 10728770
    Abstract: An amplifier for a radio communications system in a shielded tunnel is disclosed. In one example, the amplifier comprises a processor configured to execute a plurality of modules comprising a gain control module and an attenuation control module. Methods and systems are further provided for controlling and monitoring amplifier characteristics.
    Type: Grant
    Filed: May 1, 2019
    Date of Patent: July 28, 2020
    Assignee: TUNNEL RADIO OF AMERICA, INC.
    Inventors: Craig S. Pataky, David L. Wills, William David Chase
  • Patent number: 10578689
    Abstract: Embodiments of the present disclosure provide devices and systems that support wireless communication between wireless communication devices residing within, and external to, a Faraday cage. In some embodiments, devices and systems are provided for transmitting wireless signals through a waveguide port of a Faraday cage for wireless signals having frequencies below the cutoff frequency of the waveguide port, where a portion of the waveguide port is compromised by the presence of a conductor, thereby permitting the propagation of electromagnetic waves. In some embodiments, aspects of the present disclosure are employed to adapt a magnetic resonance imaging system for communications between a scanner room and a control room.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: March 3, 2020
    Assignee: INNOVERE MEDICAL INC.
    Inventors: Kevan Anderson, Garry Liu
  • Patent number: 10284297
    Abstract: Provided is a base transceiver station (BTS) apparatus that enables a licensed-assisted access (LAA) service in a licensed band and an unlicensed band. The BTS apparatus includes a head end connected to a BTS for each of multiple bands and carriers through a radio frequency (RF) line and a remote portion connected to one of optic lines that are optically expanded from the head end.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: May 7, 2019
    Inventors: Young hoon Ko, Chan ki Cho, Baek yong Park
  • Patent number: 10079940
    Abstract: A broadcasting system provides a telephone number as identity information during a registration process of a user equipment intended to be used as a user broadcasting equipment. The telephone number is one of many telephone numbers associated with the broadcasting system. During the registration process in which the user equipment is identified as a user broadcasting equipment, various information associated with the user equipment are obtained and stored. The identity information, i.e., the telephone number, maps to the stored information such that when the user equipment is used to dial the provided telephone number, the broadcasting system automatically recognizes the user equipment is making a dial to broadcast request. Upon checking the stored information associated with the user equipment, the broadcasting system allows the user equipment to broadcast to one or more other user equipment registered as listeners to a scheduled broadcast.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: September 18, 2018
    Assignee: C21 Patents, LLC
    Inventors: Kent Srikanth Charugundla, Sarina Priya Charugundla
  • Patent number: 9906256
    Abstract: Systems and methods are provided that may be implemented to utilize multiple sensors to intelligently control RF transmit power and specific absorption rate (SAR) produced from a wireless-enabled information handling system platform in the presence of a detected nearby human body. The disclosed systems and methods may be implemented in one example to avoid the poor performance and user experience that results from a reduction in the information handling system platform radio transmit power when it is not necessary (due to false detection of a human body), or that results when the platform transmit power is reduced too much and/or too quickly when nearby proximity of an actual human body is detected.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: February 27, 2018
    Assignee: Dell Products L.P.
    Inventors: Liam Prendergast, Gerald R. Pelissier, Liam B. Quinn
  • Patent number: 9736314
    Abstract: A broadcasting system provides a telephone number as identity information during a registration process of a user equipment intended to be used as a user broadcasting equipment. The telephone number is one of many telephone numbers associated with the broadcasting system. During the registration process in which the user equipment is identified as a user broadcasting equipment, various information associated with the user equipment are obtained and stored. The identity information, i.e., the telephone number, maps to the stored information such that when the user equipment is used to dial the provided telephone number, the broadcasting system automatically recognizes the user equipment is making a dial to broadcast request. Upon checking the stored information associated with the user equipment, the broadcasting system allows the user equipment to broadcast to one or more other user equipment registered as listeners to a scheduled broadcast.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: August 15, 2017
    Assignee: C21 Patents, LLC
    Inventors: Kent Srikanth Charugundla, Sarina Priya Charugundla
  • Patent number: 9673922
    Abstract: A method for estimating the speed of a user equipment connected to a base station of a wireless network, the method comprising the following steps: —performing signal strength measurements (S) of a radio signal transmitted between the user equipment and the base station; —performing a spectral analysis (11) of the signal strength measurements; —determining the frequency of a local maximum in the power spectrum of the signal strength measurements; —estimating (12), from previously established reference data, the speed of the user equipment that corresponds to the determined frequency, the reference data associating a given user equipment speed with a certain determined frequency.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: June 6, 2017
    Assignees: Alcatel Lucent, INRIA
    Inventors: Majed Haddad, Veronique Capdevielle, Afef Feki, Eitan Altman
  • Patent number: 9497706
    Abstract: Power management in a distributed communications system, such as a distributed antenna system (DAS), that includes determining user activity at remote units of the DAS. When user activity in one or more remote units falls below or above a specified threshold, power usage by the one or more remote units is reduced or increased accordingly. The power usage may reduced and/or increased by turning select remote units on or off, by increasing or reducing an operating voltage of one or more power amplifiers, and/or by turning select multiple-in, multiple-out (MIMO) front ends on or off. Power may be reduced such that wireless coverage within a specified area is maintained.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: November 15, 2016
    Assignee: Corning Optical Communications Wireless Ltd
    Inventors: Nissim Atias, Isaac Shapira
  • Patent number: 9356635
    Abstract: A particularly powerful method is used for operating a vehicle-side receiver device of a train control system. In this context, the method proceeds in a way that at least one signal which is encoded by modulation is received by the receiver device via at least one track circuit. At least one carrier frequency of the at least one received signal is determined. The transmission method used by the respective train control system is identified taking into account the determined carrier frequency, and the receiver device is set specifically for the identified transmission method. A vehicle-side receiver device of a train control system is provided for performing the method.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: May 31, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Andreas Steingroever
  • Patent number: 9225402
    Abstract: A number of techniques, which may be used together, provide distributed coordination of multiple stations so that concurrent transmissions and increased throughput are achieved on a shared radio medium. Each of the techniques provides a separate innovation that can be used alone or in combination with one or more of the other techniques.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: December 29, 2015
    Assignee: Massachusetts Institute of Technology
    Inventors: Shyamnath Gollakota, Dina Katabi, Ching-Ju Lin
  • Patent number: 9197986
    Abstract: A electromagnetic induction wireless communication system including: a magnetic antenna; an electric antenna; a tuning capacitor coupled to the magnetic antenna configured to tune the magnetic antenna; a controller configured to control the operation of the communication system; a signal source coupled to the controller configured to produce a communication signal used to drive the magnetic antenna and the electric antenna; a voltage control unit coupled to the signal source configured to produce one of an amplitude difference, phase difference, and an amplitude and a phase difference between the communication signal used to drive the magnetic antenna and electric antenna.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: November 24, 2015
    Assignee: NXP, B.V.
    Inventors: Anthony Kerselaers, Liesbeth Gommé
  • Patent number: 9153861
    Abstract: A system and method for using the skin of a vehicle as a waveguide for surface waves to support far-field signal propagation to provide communications between various electrical nodes on the vehicle and for providing power signals. A dielectric layer is formed on the skin to define the waveguide, and a coupler couples signals from the node to the waveguide and receives signals from the waveguide to be sent to the node.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: October 6, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Moshe Laifenfeld, Gill Rafael Tsouri, Eviatar Tron
  • Patent number: 9124005
    Abstract: The present device and method improve radiation efficiency of a leaky wave antenna. The device and method collect non-radiated power signal from the leaky wave antenna, perform a passive operation on the non-radiated power signal to obtain a modified power signal, and radiate the modified power signal.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: September 1, 2015
    Assignee: CORPORATION DE LE'ECOLE POLYTECHNIQUE DE MONTREAL
    Inventors: Van-Hoang Nguyen, Armin Parsa, Christophe Caloz, Samer Abielmona
  • Patent number: 9020549
    Abstract: Example embodiments described herein are directed to systems and methods by which a group of base stations (BS) can configure pilot signals in time and time-frequency, using interference management resources (IMR) and/or channel state information reference signal (CSI-RS) resources, so that the user equipment (UE) such as mobiles and laptops can measure certain possible channel quality indicators (CQI) that correspond to specific channel and interference conditions that can arise during actual data submission. Using these values, example embodiments utilize an interpolation algorithm by which the group of base stations can estimate other possible CQI corresponding to a different set of channel and interference conditions.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: April 28, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Joydeep Acharya, Long Gao, Sudhanshu Gaur
  • Patent number: 8862063
    Abstract: Methods and devices for phase shifting an RF signal for a base station antenna are provided. The device includes a transmission line that has a stationary ground plane coupled to the top of a substrate and a signal line on the bottom of the substrate. The signal line has an input port and an output port. The input port receives the RF signal with a certain phase and travels across the bottom of the substrate to the output port. The RF signal has a different phase at the output port because defected ground structures etched on the stationary ground plane shift the phase of the RF signal. In addition, the device includes a movable ground plane that may cover a portion of the defected ground structures, the substrate, and the stationary ground plane such that the moveable ground plane further adjusts the phase of the RF signal.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: October 14, 2014
    Assignee: Thiagarajar College of Engineering
    Inventors: V. Abhaikumar, S. Raju, S. Deepak Ram Prasath, R. Senthilkumar, P. Vasikaran
  • Patent number: 8854985
    Abstract: A system for wireless communication using ultrasonic signals that includes a transmission module, which receives input signals from a wireless device, modifies the received input signals in a manner that converts each received input signal into a corresponding ultrasonic signal and wirelessly transmits each said ultrasonic signal over an ultrasonic link, and a receiving module, which receives the transmitted ultrasonic signals, recovers the corresponding input signals therefrom and enables outputting each respective input signal through one or more output devices. Modification of the input signals may include compressing, encoding and modulating the input signals. The input signals may be voice audio signals for enabling to use the system for supporting phone calls by enabling ultrasonic communication between for instance, a wireless headset and a mobile phone.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: October 7, 2014
    Inventor: Yossef Tsfaty
  • Patent number: 8854227
    Abstract: One of the embodiment of present invention includes at least one transmitter-receiver set including a transmitter and a receiver opposed with an object to be measured therebetween; and a transmission device that estimates the amount of the object based on the attenuation of electromagnetic waves that are transferred between the transmitter and the receiver of the transmitter-receiver set, and transmits information on the estimated amount of the object to be measured.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: October 7, 2014
    Assignee: Kyocera Corporation
    Inventors: Makoto Chishima, Kugo Morita
  • Patent number: 8849341
    Abstract: A portable electrical device including an antenna radiation body, a wireless communication module and a cable is provided. The antenna radiation body transceives a first radio frequency (RF) signal belonging to a first frequency band. The wireless communication module processes the first RF signal. The cable connects the antenna radiation body with the wireless communication module to transmit the first RF signal. The cable has multiple grounding points. The distances between the neighboring grounding points are less than a quarter wavelength of a signal corresponding to the first frequency band.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: September 30, 2014
    Assignee: Quanta Computer Inc.
    Inventors: Chao-Hung Kuo, Hui Lin, Po-Jen Chen
  • Patent number: 8811974
    Abstract: Multipoint wireless communications are coordinated in cells with radiation that is emanated from antennas in an inward direction. In an example embodiment, an apparatus includes a first antenna, a second antenna, a third antenna and a controller. The first antenna emanates radiation from a first location in an inwardly direction for a cell. The second antenna emanates radiation from a second location in an inwardly direction for the cell. The third antenna emanates radiation from a third location in an inwardly direction for the cell. The controller coordinates the emanation of the radiation via the first, second, and third antennas so as to reduce intra-cell interference for remote terminals located within the cell. The coordination may be effected in accordance with one or more coordinated multi-point (transmission/reception) (CoMP) techniques. Different numbers of sub-cells and antennas per cell and different CoMP cell organizations may be implemented.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: August 19, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Abdulfauf Hafeez, Jiann-Ching Guey, Sven Oscar Petersson, Kambiz Zangi
  • Patent number: 8774789
    Abstract: A scheduling technique is described for discontinuous transmission and reception. The scheduling technique may be implemented in a mobile communication device with multiple SIMs. The scheduling technique facilitates enhanced communication capability for the mobile communication device. In one implementation, the scheduling technique helps avoid substantial overlap between discontinuous receive cycles of the SIMs, for example by renegotiating a discontinuous transmit/receive offset if too much overlap exists. The renegotiation process may be incorporated into a future industry standard communication protocol (e.g., 3GPP release 11 or later), or may be implemented as an extension to an existing communication protocol.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: July 8, 2014
    Assignee: Broadcom Corporation
    Inventors: Jin-Sheng Su, Jacobus C. Alberts, Rami Mehlo, Vivek Ramaprasad
  • Patent number: 8737925
    Abstract: A method for remotely and dynamically controlling adjacent satellite interference comprising monitoring one or more off-axis signals emitted by one or more remote transmitters; determining whether one or more of the off-axis signals is creating adjacent satellite interference (ASI), off axis emissions and inband interference that is higher than a predetermined level of acceptable interference, and transmitting a control signal to at least one of the one or more remote transmitters in response to the determination that the one or more off-axis signals is creating interference that is higher than the predetermined level of acceptable interference, the control signal initiating an adjustment to one or more transmission parameters of the one or more remote transmitters such that interference resulting from the one or more off-axis signals emitted by the one or more remote transmitters is reduced or eliminated.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: May 27, 2014
    Assignee: Comtech EF Data Corp.
    Inventors: Michael Beeler, Jeffery Harig, Wallace Davis, Frederick Morris, Cris Mamaril
  • Patent number: 8688033
    Abstract: An antenna transmission control device has a base-station-side and an antenna-side multiplexer circuit. There is an alternating protocol transfer between these two multiplexer circuits to control components close to the antenna. The current-alarmed or protocol-alarmed signals present at the antenna-side terminals of the multiplexer provided on the antenna side can be measured or detected by the multiplexer circuits and supplied to the transmission link together with a terminal-dependent or load-dependent protocol.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: April 1, 2014
    Assignee: Kathrein-Werke KG
    Inventors: Alexander Seeor, Markus Mohr, Roland Gabriel
  • Patent number: 8670720
    Abstract: Methods and devices for phase shifting an RF signal for a base station antenna are provided. The device includes a transmission line that has a stationary ground plane coupled to the top of a substrate and a signal line on the bottom of the substrate. The signal line has an input port and an output port. The input port receives the RF signal with a certain phase and travels across the bottom of the substrate to the output port. The RF signal has a different phase at the output port because defected ground structures etched on the stationary ground plane shift the phase of the RF signal. In addition, the device includes a movable ground plane that may cover a portion of the defected ground structures, the substrate, and the stationary ground plane such that the moveable ground plane further adjusts the phase of the RF signal.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: March 11, 2014
    Assignee: Thiagarajar College of Engineering
    Inventors: Varadhan Abhaikumar, Seenivasan Raju, Subburaj Ramprasath Deepak Ram, Rajagopal Senthilkumar, Prabhakaran Vasikaran
  • Patent number: 8634866
    Abstract: A signal coupler for coupling wireless signals out of and into a waveguide system is described. The signal coupler includes an input output connector, an outer conductor coupled to the input output connector, and a radiator section, wherein the radiator section is configured to rotate about a center axis of the outer conductor. A wireless distribution system, including a waveguide with a hollow cross-sectional structure and a signal coupling device, is also described. A wireless distribution system, including a waveguide with a hollow cross-sectional structure and a plurality of signal coupling devices, is also described. A method of operating a wireless distribution system is also described. The method includes providing a wireless distribution system and inserting a first group of wireless signals in a preselected bandwidth into the waveguide.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: January 21, 2014
    Assignee: Wireless Expressways Inc.
    Inventor: Charles D. Becker
  • Patent number: 8594717
    Abstract: A method for identifying supported transmission channel configurations in a mobile communications apparatus, the method comprising: calculating the required power value for each transmission channel configuration; and performing a sequential comparison of: an indication of an available measured power value, and an indication of the required power for each transmission channel configuration; and identifying a particular transmission channel configuration as supported if the required power for the particular transmission channel configuration is less than the available power value; wherein: the sequential comparison is performed in order of magnitude of value of the indication of the required power; and the method further comprising stopping said comparison when a supported transmission channel configuration is identified.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: November 26, 2013
    Assignee: BlackBerry Limited
    Inventor: Gideon Roberts
  • Patent number: 8571545
    Abstract: A wireless relay apparatus is provided. The wireless relay apparatus includes a telephone module configured to couple with a public switched telephone network (PSTN) to receive a telephone call, and a wireless module coupled to the telephone module to process the telephone call and configured to wirelessly connect to a mobile terminal such that the telephone call is forwarded to the mobile terminal over a short-range wireless link. Further, the wireless module is configured to operate in one of a transparent mode and a translation mode so as to exchange voice data with the mobile terminal.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: October 29, 2013
    Assignee: Shenzhen Cloud Communication Epoch Sci-Tech Ltd
    Inventors: Ning Ge, Yi Zhang, Zhiwei Meng
  • Patent number: 8565699
    Abstract: A transmitter includes a Power Amplifier (PA), an antenna, at least one passive component and control circuitry. The PA is controlled by a PA control voltage, is operative to amplify a Radio Frequency (RF) signal and has input and output amplifier terminals. The passive component has an input component terminal coupled to the output amplifier terminal of the PA and an output component terminal coupled to the antenna. The control circuitry is configured to determine an interim power level at the output amplifier terminal that causes the signal at the output component terminal to have a target output power level, to determine, based on the interim power level, a given PA control voltage that makes the interim power level producible by the PA, so that the signal at the output component terminal has the target output power level, and to apply the given PA control voltage to the PA.
    Type: Grant
    Filed: May 2, 2010
    Date of Patent: October 22, 2013
    Assignee: Marvell International Ltd.
    Inventors: David Lipshitz, Alexander Zaslavsky
  • Patent number: 8559878
    Abstract: A term for interrupting communication caused by operation of a DFS function is reduced for a wireless communication apparatus having the DFS function and a wireless communication apparatus and a wireless communication system corresponding to the DFS function of the wireless communication apparatus. In the wireless communication apparatus and the wireless communication system having a frequency changing function for changing a using frequency upon detecting out-of-target electrical waves such as electrical waves of a weather radar on a specific using frequency, information about a connection destination having a different using frequency is notified upon detecting the out-of-target electrical waves, and the connection destination is changed by switching the frequency on the basis of the information about the connection destination.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: October 15, 2013
    Assignee: Fujitsu Limited
    Inventor: Tomonori Yasumoto
  • Patent number: 8554265
    Abstract: Subscriber-generated broadcasts are distributed to mobile wireless devices in a mobile wireless telecommunication network. The network assists the subscriber in creating a broadcast by, for example, compiling one or more media content items of the subscriber's choosing, such as pre-recorded songs, the subscriber's recorded voice, sound effects, etc. The network stores the broadcast representation in a manner that allows it to be retrieved using a unique broadcast identifier. When the network receives the broadcast identifier from a user of a mobile wireless device, the network uses the broadcast identifier to retrieve the stored broadcast representation and transmit its associated media content to the mobile wireless device.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: October 8, 2013
    Assignee: AT&T Mobility II LLC
    Inventor: Phillip Buchanon
  • Patent number: 8489015
    Abstract: The design and use of a simplified, highly efficient, waveguide-based wireless distribution system are provided. A low-loss waveguide is used to transport wireless signals from a signal source or sources to one or more receiver locations. One or more adjustable signal coupling devices partially insert into the waveguide at predetermined locations along the length of the system to provide variable, controlled extraction of one or more wireless signals. Low-loss impedance matching circuitry is provided between the waveguide coupling devices and output connectors to maintain high system efficiency and the capability of supplying signals of high strength and quality to a large number of receivers in a wide wireless coverage area via a plurality of signal radiators. Some embodiments of the system are adaptable for wireless distribution service in HVAC plenum spaces while others disclose the combined functions of fire extinguishing and waveguide wireless distribution.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: July 16, 2013
    Assignee: Wireless Expressways Inc.
    Inventor: Charles D. Becker
  • Patent number: 8270376
    Abstract: Methods for improving uplink communications in a Wideband Code Division Multiple Access (WCDMA) communication system, wherein mobile terminals can transmit at various transmission power levels. In a mobile terminal, the method includes the steps of receiving a configuration message having at least one of a power offset parameter and a maximum number of retransmission attempts parameter; when the mobile terminal performs a non-scheduled transmission, it transmits according to the parameters contained in the configuration message. In a network node, the method includes the steps of transmitting to at least one mobile terminal the configuration message having at least one of a power offset parameter and a maximum number of retransmission attempts parameter; and, adjusting a power setting for the transmission of acknowledgement or negative-acknowledgement messages from the wireless network to one or more of mobile terminals.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: September 18, 2012
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Erik Dahlman, Eva Englund, Jung-Fu Cheng, Yi-Pin Eric Wang, Maria Edvardsson, Stefan Parkvall, Janne Peisa
  • Patent number: 8238961
    Abstract: A wireless communicator, including a modem operable to transmit and receive voice communication phone calls, a power amplifier coupled with the modem operable to dynamically apply a variable gain factor to voice communications transmitted by the modem, to produce an appropriate power output, and a controller coupled with the modem including a radiation monitor operable to monitor the power output of the power amplifier, the controller being operable to restrict operation of the modem, based on data provided by the radiation monitor, when the cumulative power output produced by the power amplifier exceeds a pre-designated daily cumulative power limit.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: August 7, 2012
    Assignee: Google Inc.
    Inventors: Eyal Bychkov, Lior Storfer, Itay Sherman, Hagay Katz, Uriel R. Brison, Uri Ron, Tal Engelstein, Sagiv Zeltser
  • Patent number: 8229754
    Abstract: Systems, methods, and computer program products for graphically displaying audio data are provided. In some implementations, a method is provided. The method includes displaying a graphical visual representation of digital audio data, the representation displaying a feature of the audio data on a feature axis with respect to time on a time axis. The method also includes receiving an input in the graphical visual representation selecting a range with respect to the feature and automatically extending the selected range with respect to time to define a selected region of the visual representation, where the extended range with respect to time is predefined and ignoring any component of the received input with respect to time.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: July 24, 2012
    Assignee: Adobe Systems Incorporated
    Inventors: Daniel Ramirez, Todd Orler, Shenzhi Zhang, Jeffrey Garner
  • Patent number: 8213978
    Abstract: Characterization and enhancement of a mobile local scattering environment. The system includes a channel component and a link control component, wherein the channel component facilitates communication of a ping signal, which is used to estimate the delay spread characteristics and/or angle of arrival in order to characterize the mobile local scattering environment. This information is sent to the link control component, which enhances radio link performance based on the received information. The system can be used to assist in E-911 location applications, such as determining the location of an indoor user.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: July 3, 2012
    Assignee: AT&T Mobility II LLC
    Inventors: Ming-Ju Ho, Ali Jabbary, Stalin Albanes
  • Patent number: 8195218
    Abstract: Methods and systems are provided for facilitating wireless communications over a coaxial network coupled to a wireless communications network. The system comprises one or more set-top boxes capable of facilitating bi-directional wireless communications, one or more converting devices capable of converting between optical signaling and electrical signaling, and a base transceiver station coupled to one or more communications networks. One method comprises providing a set-top box capable of facilitating bi-directional wireless communications and providing for the communication of data through an out-of-band frequency channel. Another method comprises providing a set-top box physically coupled to a coaxial network and wireless network by a communications line having an out-of-band frequency channel, receiving a request to establish communications, and logically coupling two endpoints.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: June 5, 2012
    Assignee: Sprint Communications Company L.P.
    Inventors: Timothy L. Swan, Leonard E. Barlik
  • Patent number: 8125288
    Abstract: A method for modulating a signal transmitted by a first device to a second device which is energised by the signal, wherein the first device is further arranged to amplitude modulate the signal so as to transmit data thereon, the method further comprising phase modulating the signal.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: February 28, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Robert John Castle, John Waters
  • Patent number: 8078215
    Abstract: The design and use of a simplified, highly efficient, waveguide-based wireless distribution system are provided. A low-loss waveguide is used to transport wireless signals from a signal source or sources to one or more receiver locations. One or more adjustable signal coupling devices partially insert into the waveguide at predetermined locations along the length of the system to provide variable, controlled extraction of one or more wireless signals. Low-loss impedance matching circuitry is provided between the waveguide coupling devices and output connectors to maintain high system efficiency. The system offers the capability of supplying signals of high strength and high quality to a large number of receivers in a wide wireless coverage area via a plurality of signal radiators. Some embodiments of the system are readily adaptable for wireless distribution service in HVAC plenum spaces. A system that combines the functions of fire extinguishing and waveguide wireless distribution is also disclosed.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: December 13, 2011
    Inventor: Charles D. Becker
  • Patent number: 8078214
    Abstract: A wireless communication system which includes a wireless base station; a plurality of leaky transmission lines that function as antennas of the wireless base station; and a selector for selecting each of the leaky transmission lines and thereby connecting the leaky transmission lines to the wireless base station, wherein only one leaky transmission line is selected and connected at any given time. The selector may select all of the leaky transmission lines cyclically, one at any given time. Alternatively, the selector may select one of the leaky transmission lines according to a control signal from a selection controller.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: December 13, 2011
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Jun Yaginuma, Naohiro Matsushita, Tomonori Sugiyama
  • Publication number: 20100331038
    Abstract: A mobile station (14) transmits a connection request signal (TCCH) to a base station (12) (S102), and detects whether or not a connection response signal (SCCH) is received from the base station (12) within a predetermined period of time. If the connection response signal (SCCH) is not received within the predetermined period of time, the mobile station (14) decreases the number of subcarriers used for transmitting a radio signal to the base station (12), increases transmission power per subcarrier by an amount of power corresponding to an amount of decrease in the number of subcarriers (S104), and retransmits the connection request signal (TCCH) (S106).
    Type: Application
    Filed: February 25, 2009
    Publication date: December 30, 2010
    Applicant: Kyocera Corporation
    Inventor: Nobuyuki Tanaka
  • Patent number: 7840233
    Abstract: One end of a balanced line is connected to a base station. A transmitting and receiving antenna is connected to the other end of the balanced line. The balanced line not only transmits a signal sent from the base station to the transmitting and receiving antenna and at the same time leaks a part of the transmitted signal as the radio waves, but also transmits the received signal at the transmitting and receiving antenna to the base station. In a room where the balanced line is laid, wireless communication terminals are provided. The wireless communication terminals transmit and receive radio waves to or from either the balanced line or the transmitting and receiving antenna.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: November 23, 2010
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Tomonori Sugiyama, Jun Yaginuma
  • Patent number: 7783264
    Abstract: A diversity apparatus includes a transceiver, a phase shifter which switches phases of a carrier wave transmitted from the transceiver, and a leakage transmission path which transmits the carrier wave output from the phase shifter. The transceiver switches a phase of the phase shifter depending on a receiving level.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: August 24, 2010
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Sadatoshi Oishi, Tomonori Sugiyama, Jun Yaginuma
  • Patent number: 7742777
    Abstract: A dynamic arrangement for reducing the presence of ingress noise in the upstream signal path of a two-way cable system utilizes a variable attenuation element and amplifier disposed along the upstream signal path. The amplifier includes a bypass switch so that the amplifier may be switched in to or out of the upstream path. A signal processor associated with the communications gateway functions to calculate the upstream loss present at the gateway and control the operation of the attenuation element, amplifier and bypass switch accordingly. Upstream attenuation is selected to be as large as possible, yet still allow in-building cable devices to communicate with their associated head end (HE) receiver equipment, after accounting for maximum transmit limitations.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: June 22, 2010
    Assignee: General Instrument Corporation
    Inventors: Jay Strater, Dean Stoneback, Kevin T. Chang
  • Patent number: 7676239
    Abstract: A method for operating a power controller in a wireless communication device is provided that includes generating a power controller output signal using an open loop polar modulation scheme. The power controller output signal is operable to control the power delivered to a high-band power amplifier and a low-band power amplifier. A band state is determined for the wireless communication device. The power controller output signal is provided to the high-band power amplifier when the band state is a high-band state and to the low-band power amplifier when the band state is a low-band state.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: March 9, 2010
    Assignee: National Semiconductor Corporation
    Inventors: James T. Doyle, Dae Woon Kang
  • Publication number: 20090325628
    Abstract: The design and use of a simplified, highly efficient, waveguide-based wireless distribution system are provided. A low-loss waveguide is used to transport wireless signals from a signal source or sources to one or more receiver locations. One or more adjustable signal coupling devices partially insert into the waveguide at predetermined locations along the length of the system to provide variable, controlled extraction of one or more wireless signals. Low-loss impedance matching circuitry is provided between the waveguide coupling devices and output connectors to maintain high system efficiency. The system offers the capability of supplying signals of high strength and high quality to a large number of receivers in a wide wireless coverage area via a plurality of signal radiators. Some embodiments of the system are readily adaptable for wireless distribution service in HVAC plenum spaces. A system that combines the functions of fire extinguishing and waveguide wireless distribution is also disclosed.
    Type: Application
    Filed: September 8, 2009
    Publication date: December 31, 2009
    Inventor: Charles D. BECKER
  • Patent number: 7616968
    Abstract: The communication system comprises amplification units coupled to the radiating transmission line at periodic locations for amplifying communication signals radiating and traveling upstream and downstream on the transmission line. During normal operation, mobile communication units near the radiating transmission line can communicate with other mobile communication units near the transmission line as well as with a base station by transmitting communication signals at a first and second frequency. The amplification units also comprise degradation detection units which detect when the communication system has been degraded between any two amplification units. Upon detection of a degradation, the amplification units commence to amplify, transmit and receive the communication signals across the location of the detected degradation at a first fault frequency and a second fault frequency, rather than the first frequency and second frequency, respectively.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: November 10, 2009
    Assignee: Mine Radio Systems Inc.
    Inventor: Patrick M. Y. Waye
  • Patent number: 7606592
    Abstract: The design and use of a simplified, highly efficient, waveguide-based wireless distribution system are provided. A low-loss waveguide is used to transport wireless signals from a signal source or sources to one or more receiver locations. One or more adjustable signal coupling devices partially insert into the waveguide at predetermined locations along the length of the system to provide variable, controlled extraction of one or more wireless signals. Low-loss impedance matching circuitry is provided between the waveguide coupling devices and output connectors to maintain high system efficiency. The system offers the capability of supplying signals of high strength and high quality to a large number of receivers in a wide wireless coverage area via a plurality of signal radiators. Some embodiments of the system are readily adaptable for wireless distribution service in HVAC plenum spaces. A system that combines the functions of fire extinguishing and waveguide wireless distribution is also disclosed.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: October 20, 2009
    Inventor: Charles D. Becker
  • Patent number: 7590404
    Abstract: At a first site, a first antenna exchanges first communications with wireless devices, and exchanges the first communications with a first base station. The first base station exchanges the first communications with a service node. At a second site, a second antenna exchanges second communications with other wireless devices, and exchanges the second communications with a first surface wave interface. The first surface wave interface exchanges the second communications with a second surface wave interface at the first site. The second surface wave interface exchanges the second communications with a second base station at the first site. The second base station exchanges the second communications with the service node. The service node processes the first and second communications to provide a communication service to the wireless devices.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: September 15, 2009
    Assignee: Sprint Communications Company L.P.
    Inventors: Harold W. Johnson, Timothy D. Euler
  • Patent number: 7567817
    Abstract: A porous ceramic substrate is disclosed that is fabricated from biosoluble ceramic fibers. Porosity and permeability of the substrate is provided by intertangled biosoluble fibers, that can be formed into a honeycomb form substrate through an extrusion process. The fibrous structure is formed from mixing biosoluble fibers with additives that include a bonding agent, and a fluid to provide an extrudable mixture. The structure is sintered at a temperature that exceeds the glass formation temperature of the bonding agent, but less than the maximum operational limits of the biosoluble fiber, to form a structure that has sufficient strength and porosity to provide for filtration and/or as a catalytic host.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: July 28, 2009
    Assignee: GEO2 Technologies, Inc.
    Inventors: James Jenq Liu, Bilal Zuberi
  • Publication number: 20090186649
    Abstract: A mobile communication terminal according to the present invention has a leaky transmission line whose radiation direction faces opposite a radiation direction of a part or a whole of the leaky transmission line of a wireless base station, as at least a part of an antenna element, connected to the communication terminal. Here, preferably, when a difference in angle between the radiation directions falls within the range between 180±7.5 degrees, the radiation directions are considered to face opposite each other. With this configuration, even when the leaky transmission line of the wireless base station has a curved line portion, a curved portion or the like, it is possible to ensure satisfactory communications with the wireless base station without a complicated configuration of the system but by a simple process to build the system.
    Type: Application
    Filed: January 15, 2009
    Publication date: July 23, 2009
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, FUJIKURA LTD
    Inventors: Tomonori Sugiyama, Naohiro Matsushita, Jun Yaginuma, Fumio Suzuki, Kazuhiko Takano, Nobunao Ishii
  • Patent number: 7528785
    Abstract: A wireless communication device and method for identifying a container, or communication information about a container using a slot in the container as an antenna. The device includes a wireless communication device for transmitting information regarding the container. The container includes an outer wall forming rim and a slot between the rim edge and the outer wall that is circular and continues without boundaries. The wireless communication device is coupled to the slot to provide the slot antenna for communications. An impedance matching network is additionally provided to make the operating frequency of the slot substantially the same as the operating frequency of the wireless communication device. Alternatively, shorting posts may be placed in the slot to define boundaries of the slot to match the operating frequency of the slot to the operating frequency of the antenna. Multiple feed points may be provided between the wireless communication device and the slot.
    Type: Grant
    Filed: December 23, 2005
    Date of Patent: May 5, 2009
    Inventors: Ian J Forster, Peter Robert George Horrell