Method of virtual circuit reconnection without loss of call session
In one embodiment, the present invention provides for a method of reestablishing virtual circuits after the interruption thereof. Specifically, in a communication system comprising a network with a pl... Read More
Inventors: Whiting, David; Wilbur, Greg; Sultan, Nevein; Mayer, Richard K.;, Assignee: Nortel Networks Limited (St. Laurent, CA) |
Aircraft display and control system with virtual backplane architecture
The invention discloses an aircraft control system which improves system flexibility, scalability, redundancy, and separation. The system uses a "virtual backplane" architecture which maximizes system... Read More
Inventors: Birkedahl, Byron F.; Endrud, Douglas G.;, Assignee: Honeywell (Minneapolis, MN) |
Apparatus and method for data transmission to inhibit radio signal fading with sequential transmission of data groups based upon power levels
OF EMBODIMENTS OF THE INVENTION Embodiments of the present invention will now be described by way of example only, and with reference to the accompanying drawings. FIG. 1 shows a diagrammatic represe... Read More
Inventors: Richardson, Andrew;, Assignee: Nokia Mobile Phones Ltd. (Salo, FI) |
Dual mode satellite/cellular terminal
OF THE DISCLOSURE FIG. 1 illustrates the allocations of frequencies for Personal Satellite Communications services in world regions R1, R2 and R3 compared to FCC proposals for new frequencies to be o... Read More
Inventors: Dent, Paul W.;, Assignee: Ericsson Inc. (Research Triangle Park, NC) |
Method and apparatus for filter selection from a frequency synthesizer data
OF PREFERRED EMBODIMENTS In the following description of preferred embodiments, reference is made to the accompanying drawings, which form a part thereof, and in which is shown, by way of illustratio... Read More
Inventors: Eswein, Glenn William; Curran, Daniel James; Hamilton, Graham Stuart; Reardon, James Francis; O'Connor, John Francis;, Assignee: Conexant Systems, Inc. (Newport Beach, CA) |
Synchronization method for a mobile radiotelephone
It is an object of the invention to provide a synchronization method that fulfills all the requirements of digital information transmission with the least possible technical complication and expense. ... Read More
Inventors: Bilitza, Herbert; Gartner, Biegfried; Neuner, Hermann;, Assignee: Robert Bosch GmbH (Stuttgart, DE) |
Multimedia data communications system
The present invention relates to a data communications system for use in a work environment to establish a connection between a data communication device and an access point in connection with a commu... Read More
Inventors: Schanhals, Jeffrey Alan; Steffes, Christopher Carl; Tonizzo, Anthony; Vallillee, IV, George William;, Assignee: Steelcase Development Corporation (Caledonia, MI); Datalogic Corporation (Grand Rapids, MI) |
Circuit for discriminating received signal modulation type
It is an object of the present invention to provide a received signal modulation type discriminating circuit capable of correctly discriminating the modulation type of a received signal at high speed.... Read More
Inventors: Kimura, Kimiyoshi; Shiraishi, Kenichi; Shinjo, Souichi;, Assignee: Kabushiki Kaisha Kenwood (Tokyo, JP) |
Receiver with adaptive processing
The present invention is directed to a scheme for efficiently using power in a receiver designed for QPSK or other modulated signals. According to one embodiment, the present invention is a receiver f... Read More
Inventors: Prasanna, G. N. Srinivasa;, Assignee: Agere Systems Guardian Corp. (Orlando, FL) |
Mobile station positioning system
An idea of the invention is to calculate the position of a mobile station on the basis of the observed time difference (OTD) between signals received from at least two base stations. The time differen... Read More
Inventors: Silventoinen, Marko; Rantalainen, Timo; Raitola, Mika; Ranta, Jukka Tapio;, Assignee: Nokia Mobile Phones, Ltd. (Salo, FI) |
Cellular radio location system
According to the invention, there is provided a method of determining the location of a mobile unit of a cellular radio system having a plurality of base stations, comprising the steps of determining ... Read More
Inventors: Munday, Peter R; Goetz, Ian; Gannon, Stephen M;, Assignee: British Telecommunications Public Limited Company (London, GB) |
Apparatus, method, and computer program products for cell-hopping satellite communications
OF THE PREFERRED EMBODIMENTS The present invention is described in terms of the above example. This is for convenience only and is not intended to limit the application of the present invention. In f... Read More
Inventors: Jacomb-Hood, Anthony W.; Dentinger, Aaron M.; Maalouf, Khalil J.;, Assignee: Lockheed Martin Corporation (Bethesda, MD) |
Phaseshift network for an IQ modulator
OF THE INVENTION Referring to FIG. 3 there is shown a block diagram of a third phaseshifter configuration for use with an IQ modulator. In this configuration, .+-.45.degree. phaseshifters P1 and P2 a... Read More
Inventors: Mucke, Lars H.;, Assignee: Nokia Mobile Phones, Ltd. (Helsinki, FI) |
Tuning techniques for I/Q channel signals in microwave digital transmission systems
What is claimed is: 1. In a vector modulation system of the type including an I/Q digital encoder means for providing a digital signal for the in-phase I component of a data signal and a digital signa... Read More
Inventors: Tiittanen, Erkki; Mattila, Heikki; Rautava, Tapio; Matero, Jorma; Ostman, Kjell; Halttunen, Mikko;, Assignee: Nokia Mobile Phones Ltd. (Salo, FI) |
I/Q-modulator and I/Q-demodulator
According to the present invention there is provided an I/Q-modulator or I/Q-demodulator comprising capacitors so coupled that the modulating signals can be provided through a pair of output phase shi... Read More
Inventors: Murtojarvi, Simo;, Assignee: Nokia Mobile Phones Ltd. (Salo, FI) |
Method and apparatus for compensation for a DC voltage offset of a digital to analog converter
In a first aspect the present invention provides a method for compensating for an offset in a signal of an electronic device, comprising the steps of: inputting a predetermined signal to the electroni... Read More
Inventors: Mikkola, Pekka; Lintinen, Markku; Ranta, Jukka;, Assignee: Nokia Mobile Phones Ltd. (Salo, FI) |
AM removal from FM signal generated by IQ modulator
The foregoing and other problems are overcome and the objects of the invention are realized by methods and apparatus in accordance with embodiments of this invention. As described herein, a circuit is... Read More
Inventors: Matero, Jorma;, Assignee: Nokia Mobile Phones Limited (Salo, FI) |
Decimated noise estimation and/or beamforming for wireless communications
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the invention. It ... Read More
Inventors: Magee, David Patrick; Hosur, Srinath;, Assignee: Texas Instruments Incorporated (Dallas, TX) |
Electric melting furnace for glassifying high-radioactive waste
In accordance with the present invention, in a melting furnace having an outlet for discharging glass at the bottom part of a melting tank, the bottom of the furnace surrounding the outlet has an incl... Read More
Inventors: Sasaki, Noriaki; Igarashi, Hiroshi; Endo, Noboru; Inada, Katsumi; Nakamura, Toshio; Takeuchi, Hirokazu;, Assignee: Doryoku Kaunenryo Kaihatsu Jigyodan (Tokyo, JP); Nippon Denki Garasu Kabushiki Kaisha (Shiga, JP) |
Apparatus for generating tracking error signals in a differential phase detection system
Accordingly, it is an object of the present invention to provide a tracking servo circuit for an optical pick-up that can eliminate the above-noted defects inherent in the prior art. Another object of... Read More
Inventors: Fujiie, Kazuhiko; Nonaka, Chiaki; Yoshida, Tadao;, Assignee: Sony Corporation (Tokyo, JP) |
Time slot interchanger and digital communications terminal for ISDN D-channel assembly
One aspect of the invention is a method and apparatus for multiplexing ISDN D-channel signals into multiplexed signals. Another aspect of the invention is a digital communications terminal that assemb... Read More
Inventors: Wille, David G.; Magleby, Kay B.;, Assignee: Alcatel USA Sourcing, L.P. (Plano, TX) |
System packet-based centralized base station controller
OF A PREFERRED EMBODIMENT While this invention is susceptible of embodiment in many different forms, there is shown in the drawings, and will be described herein in detail, specific embodiments there... Read More
Inventors: Sauer, John M.; Steinberg, Paul; Timbs, Jeffrey L.; Pedziwiatr, Joseph; Lovette, Steve; Sears, Thomas L.;, Assignee: Motorola Inc. (Schaumburg, IL) |
System and method for providing efficient signaling for a positioning request and an indication of when a mobile station becomes available for location services
The present invention is directed to telecommunications systems and methods for reducing the unnecessary signaling caused by a positioning request for an MS when that MS does not respond to paging req... Read More
Inventors: Havinis, Theodore; Papadimitriou, Dimitris;, Assignee: Ericsson Inc. (Research Triangle Park, NC) |
Inter-MSC handover in high-speed data transmission
OF THE INVENTION With reference to FIGS. 1 and 2, parallel call set-up can be implemented at least in two alternative manners. According to the first embodiment of the invention, the procedure is as ... Read More
Inventors: Lahtinen, Lauri;, Assignee: Nokia Telecommunications Oy (Espoo, FI) |
Neighborhood cordless service call handoff
OF PREFERRED EMBODIMENTS Referring to FIG. 1, there is shown an exemplary system architecture for providing local cordless services (LCS) according to the present invention. LCS according to the pres... Read More
Inventors: Chow, Albert; Kim, Jinman; Wang, Spencer; Ying, Wenchu;, Assignee: AT&T Corp. (New York, NY) |
Data communication system
I claim: 1. A system for communicating received digital signals over a bandwidth limited data link, the system comprising: a low-pass filter having an input for receiving a digital signal with a highe... Read More
Inventors: Stoner, Donald L.;, Assignee: The Microperipheral Corporation (Redmond, WA) |
Program creation apparatus for reactive systems
To achieve the objects mentioned above, the present invention provides a program creation apparatus for reactive systems comprising: a parts storage unit for storing methods defining actions common to... Read More
Inventors: Ono, Kiyoshi; Yaegashi, Seiki;, Assignee: International Business Machines Corporation (Armonk, NY) |
Time division demultiplexer with independent data distribution
OF THE INVENTION FIG. 2 shows a demultiplexing system constructed in accordance with the invention providing simple and efficient selective and independent data distribution. Furthermore, the data di... Read More
Inventors: Huffman, Charles E.;, Assignee: Rockwell International Corporation (El Segundo, CA) |
Laser source
It is therefore a primary object of the present invention to provide a laser source with small output fluctuations due to variations in ambient temperature. To achieve that object, the present inventi... Read More
Inventors: Ohmori, Shigeru; Sasai, Yoichi;, Assignee: Matsushita Electric Indutrial Co., Ltd. (Osaka, JP) |
Method of controlling continuous carburization furnace
An object of the present invention is to realize a method of controlling a continuous carburization furnace capable of reducinq fluctuation of the carburizing condition and improving the productivity ... Read More
Inventors: Uno, Kazuo; Sumitomo, Makoto;, Assignee: Toyota Jidosha Kabushiki Kaisha (JP) |
Cell Phones 
