Abstract: A receiver for receiving data carried by multiple carriers, the receiver having: estimation means for forming an estimate of the reliability with which data from one or more of the carriers is received as distinct from the reliability with which data from one or more other of the carriers is received; and a decoder arranged for forming an estimate of the symbols represented by the data received from the carriers in dependence on the estimate of reliability.

Abstract: A receiver may be operable to receive an inter-symbol correlated (ISC) signal, and generate a plurality of soft decisions as to information carried in the ISC signal. The soft decisions may be generated using a reduced-state sequence estimation (RSSE) process. The RSSE process may be such that the number of symbol survivors retained after each iteration of the RSSE process is less than the maximum likelihood state space. The plurality of soft decisions may comprise a plurality of log likelihood ratios (LLRs). Each of the plurality of LLRs may correspond to a respective one of a plurality of subwords of a forward error correction (FEC) codeword.

Abstract: A radio receiver (100) includes a symbol recovery unit (108) the produces a raw symbol stream (112) and a recovered symbol stream (116). The recovered symbol stream is produced by applying symbol recovery parameters to the raw symbols. The symbol recovery parameters are updated (218) when the symbol recovery parameters used by the symbol recovery unit lack a requisite level of validity and there is a sufficient indication, based on successive instance of sync information using instance-specific recovery parameters, updated recovery parameters are valid.

Abstract: A receiver for compensating I/Q mismatch includes an analog down-conversion unit for receiving a radio frequency signal and down-converting the RF signal into a set of digital low intermediate frequency (IF) signals, a digital down-conversion unit receiving the set of digital low IF signals and down-converting the set of digital low IF signals into first and second baseband signals, and a compensation unit. The compensation unit receives the first and second baseband signals, calculates a compensation parameter based thereon, and compensates I/Q mismatch effect according to the first and second baseband signals and the compensation parameter so as to output a target signal.

Abstract: A propagation channel estimation unit estimates a propagation channel estimated value. A symbol replica generation unit generates a symbol replica which is a modulated symbol from demodulated information. A signal extraction unit extracts each subcarrier component from a received signal from which interference has been removed, based on the propagation channel estimated value and the symbol replica. A demodulation unit demodulates the signals of the subcarrier components extracted by the signal extraction unit.

Abstract: Certain embodiments of the present disclosure provide a hybrid receiver diversity scheme that involves combining received signals in accordance with a combination of multiple receive diversity schemes. Certain embodiments of the present disclosure provide a hybrid transmit diversity scheme that involves transmitting diversity signals to a receiver according to a transmit diversity scheme selected based on signal quality measurements received from the receiver.

Abstract: Method and apparatuses are disclosed to substantially compensate for various unwanted interferences and/or distortions within a communications receiver. Each of these apparatuses and methods estimate the various unwanted interferences and/or distortions within the communications receiver. Each of these apparatuses and methods remove the estimates of the various unwanted interferences and/or distortions within the communications receiver from one or more communications signals within the communications receiver to substantially compensate for the various unwanted interferences and/or distortions.

Abstract: Systems and methods are disclosed for improving digital feed-forward data recovery of high speed data from a received data stream in a data transceiver or receiver where the receiver clock is asynchronous to the transmitter clock used to transmit the received data stream. In one example, the received data stream is oversampled using N evenly-spaced multi-phase clocks. The oversampled data are packed into a data block. Data transition edges of the oversampled data in the data blocks with respect to multi-phase clocks are tracked. The tracked data transition edges are used to determine the length of a decision window and to further divide the oversampled data into groups of bits that are hypothesized to be samples of the same received data symbol. Bit mapping is performed on the decision window to recover the received data symbol. By tracking the movement of data transition edges, the technique enhances data recovery capability.

Abstract: A memory controller receives data and phase-providing signals from a memory device. The phase-providing signal is not a clock signal, but is used by the memory controller to phase align a local data-sampling signal with the incoming data. The memory controller samples the data signal with the data-sampling signal. The memory controller can perform maintenance operations to update the phase relationship between the phase-providing and data-sampling signals.

Abstract: An efficient synchronization procedure applicable to mesh WLAN based on the 802.11s standard is proposed. A first and second stations initiate the process and establish a communication link between them. Next, the first station transmits to the second station a synchronization element that contains: a capability information element indicative of a capability of the first station to synchronize, and a status information element indicative of whether the first station has established a synchronized peer link with another station. One of the two stations may then initiate the actual handshake for synchronization. The initiator transmits a request for synchronization and receives a response from the other station representative of the acceptance by the other station of the synchronization, the request and the acceptance being restrained in that the stations may not entertain conflicting synchronization procedures with different links. The request may include a set of the synchronization profile.

Abstract: An enhanced base station and clock synchronization method are provided. The method includes scanning to discover a satellite transmitting a satellite signal and a master base station providing clock synchronization signal, entering, when a satellite having a signal that fulfills predetermined conditions is found, a master mode for receiving the satellite signal to acquire clock synchronization and transmitting a clock synchronization signal to at least one slave base station, and entering, when no satellite having a signal that fulfills the predetermined conditions is found, a slave mode for receiving the clock synchronization signal from the master base station to acquire clock synchronization. The method allows the base station to switch between the master and slave modes dynamically according to variation of the communication environment, resulting in efficient clock synchronization.

Abstract: A bursty phase detector comprises upper and lower branches. The upper branch includes a voltage-controlled oscillator (VCO) providing a VCO phase; a phase detector with a first input for receiving a data stream and a second input coupled to the output of the VCO, the phase detector providing a phase error; a sample selector with a first input for receiving a sum of the VCO phase and the phase error, and a second input coupled to receive the data stream, the sample selector providing a data stream sample; a signal stream detector with a first input for receiving the sum of the VCO phase and the phase error, and a second input coupled to the output of the sample selector, the signal stream detector generating a data stream phase and a data stream detect signal. The lower branch includes a delay component with an input for receiving the data stream.

Abstract: A system and method are provided for generating a jitter-attenuated clock using an asynchronous gapped clock source. The method accepts a first reference clock having a first frequency. Using the first reference clock, an asynchronous gapped clock is generated having an average second frequency less than the first frequency. A dynamic numerator (DN) and dynamic denominator (DD) are iteratively calculated for the gapped clock. Then, DN and DD are averaged. In response to the averaging, an averaged numerator (AN) and an averaged denominator (AD) are generated. Finally, the first frequency (first reference clock) is multiplied by the ratio of AN/AD to create a jitter-attenuated second clock having the second frequency.

Abstract: An apparatus and method for operating a frequency synthesizer wherein a value of an first control signal associated with a fine frequency feedback loop connected to a signal generator is monitored, and a second control signal associated with a medium or coarse frequency feedback loop connected to the signal generator is adjusted based on the monitoring. The first and second control signals are then output to control the frequency synthesizer.

Abstract: A clock data recovery circuit includes a phase detector circuit, a filter circuit, a parts per million (PPM) detector circuit, a PPM decoder circuit, a summation circuit, and a phase interpolator circuit. The phase detector circuit generates a phase error signal based on a periodic signal and a data signal. The filter circuit generates a filtered signal based on the phase error signal. The PPM detector circuit and the PPM decoder circuit generate control signals based on the filtered signal. The phase interpolator circuit generates the periodic signal. The clock data recovery circuit adjusts a phase of the periodic signal based on the filtered signal and the control signals in response to variations in a data rate of the data signal using spread-spectrum clocking in order to track changes in the data rate of the data signal.

Abstract: A reproduction apparatus includes a setter configured to set at least one language, a separator configured to separate and output a video signal and an audio signal, a video signal processor configured to decode and encode the video signal, a first decoder configured to output a first center channel signal and a multi-channel signal generated by extraction of the first center channel signal, a second decoder configured to output a second center channel signal, and a selector configured to receive the first and second center channel signals and assign, according to a setting in the setter, the first and second center channel signals respectively to different outputs.

Abstract: Apparatus for generating thermal neutrons includes an electron accelerator for generating an electron beam and a converter for converting the electron beam into photons. A receiving device is provided for receiving the photons and includes a material which provides a photoneutron target for the photons, for producing high energy neutrons in a photonuclear reaction between the photons and the photoneutron target, and for moderating the high energy neutrons to generate the thermal neutrons. The electron beam has an energy level high enough to produce photons of sufficient energy to exceed the photodissociation threshold of the selected target material, but that is sufficiently low as to enable the material to moderate the high energy neutrons resulting from the photonuclear reaction.

Abstract: A fuel exchange apparatus, comprising: a traveling carriage moving horizontally in one direction; a traversing carriage moving horizontally on the traveling carriage in a direction orthogonal to the one direction in which the traveling carriage moves; and a fuel holding unit attached to the traversing carriage, and including an telescopic tube enabling to extend and contract, a holding tool for holding a fuel assembly and releasing the held fuel assembly, and a lifter for raising and lowering the holding tool by winding and running out linear members for suspending and supporting the holding tool from the traversing carriage, wherein the holding tool is selectively placed in a constrained state in which the holding tool is subject to a constraint by the telescopic tube and in a freely suspended state in which the holding tool is released from the constraint by the telescopic tube and freely suspended by the linear members.

Abstract: A support clamp assembly for mechanically securing a thermal sleeve to an elbow conduit in a jet pump of a nuclear reactor vessel, the support clamp assembly including: a tension shaft having a first end extendable through an opening in a sidewall of the elbow conduit and an opposite end with a head; a cruciform assembly having a base with an opening to receive the tension shaft and to abut the head of the shaft, wherein the cruciform assembly seats in the thermal sleeve; a boss slidable over the first end of the tension shaft and having a curved surface seating an outside surface of the elbow conduit, and a coupling device engaging the first end of the tension shaft and abutting the boss, wherein the coupling device places the tension shaft under tension to secure the cruciform assembly to the thermal sleeve and the boss to the elbow conduit.

Abstract: A nuclear fuel rod plenum spring assembly that has a spacer affixed to the lower end of the ground torsion spring. The spacer has a substantially flat surface on its underside that presses against the upper surface of the upper fuel pellets to spread the load of the spring over the top surface of the upper most fuel pellet.

Abstract: A shift register unit and a gate drive device for a liquid crystal display are disclosed. Both gate and drain of the tenth thin film transistor are connected to the source of the fifth thin film transistor, a source thereof is connected to a low voltage signal input terminal, threshold voltages of the eighth thin film transistor and the ninth thin film transistor are equal to or less than threshold voltage of the tenth thin film transistor. The shift register unit and the gate drive device for liquid crystal display provided in the present invention, could enable the thin film transistor used to suppress the noise in the shift register unit to maintain turning on, therefore it guarantees the reliability of the shift register unit.

Abstract: A method and apparatus are provided to filter x-ray beams generated using a CT apparatus or other x-ray based system with displaced acquisition geometry. A CT apparatus may be used having a source (102), a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data, and a filter (146). The filter may absorb at least a portion of overlapping radiation emitted by the source at opposing angular positions. The amount of transverse displacement may be determined for a desired field of view configuration and amount of overlapping radiation. The detector may be adjusted to correspond to the amount of determined transverse displacement. The size and location of the filter may be determined based on the amount of overlapping radiation. The filter may be adjusted to correspond to the determined size and location of the filter.

Abstract: A radiation therapy system including a radiation therapy apparatus for generating a therapeutic treatment beam, with which an object is irradiated, an imaging apparatus for generating a medical image of the object, and a positioning apparatus, with which the object is positioned in the radiation therapy system for irradiation and imaging purposes, is provided. The imaging apparatus and the radiation therapy apparatus are both rotatably mounted so that the object is positioned in a first rotation state in the imaging apparatus and is positioned in the radiation therapy apparatus in a second rotation state.

Abstract: Systems, devices, and methods are described including implantable radiation sensing devices having exposure determination devices that determines cumulative exposure information based on the at least one in vivo measurand.

Abstract: A radiation imaging apparatus communicating with a radiation imaging control apparatus for controlling an operation of acquiring a radiation image includes a radiation detection unit configured to detect radiation and to acquire the radiation image, a storage unit configured to store information about a plurality of the radiation imaging control apparatuses, a selection unit configured to select one of the plurality of the radiation imaging control apparatuses as an apparatus to communicate with the radiation imaging apparatus, and a setting unit configured to set communication with the radiation imaging control apparatus selected by the selection unit.

Abstract: A multi-X-ray generating apparatus which has a plurality of electron sources arranged two-dimensionally and targets arranged at positions opposite to the electron sources includes a multi-electron source which includes a plurality of electron sources and outputs electrons from driven electron sources by selectively driving a plurality of electron sources in accordance with supplied driving signals, and a target unit which includes a plurality of targets which generate X-rays in accordance with irradiation of electrons output from the multi-electron source and outputs X-rays with different radiation qualities in accordance with the generation locations of X-rays. The generation locations and radiation qualities of X-rays from the target unit are controlled by selectively driving the electron sources of the multi-electron source.

Abstract: An anti-scatter grid for an x-ray imaging system. The grid has substrate having a first face and a second face. The substrate has a plurality of grooves opening onto the first face of the substrate and not opening onto the second face. The substrate has high X-ray absorption properties. Each groove has an orientation such that the planes of all the grooves are convergent and intersect along a line situated on the side of the second face where the grooves do not open.

Abstract: Embodiments of the present disclosure generally pertain to systems and methods for providing notifications of hazardous ground conditions in telecommunication equipment. A system in accordance with an exemplary embodiment of the present disclosure comprises a control module positioned within a chassis at a network facility. The control module communicates with a plurality of access modules through a backplane of the chassis. At least one of the modules, such as the control module, comprises a voltage sensing element, control logic, and a user interface. The voltage sensing element is configured to measure a potential voltage difference between chassis ground and digital ground and determine whether such voltage difference is hazardous. The control logic is configured to monitor the voltage sensing element and provide an alarm via the user interface when the hazardous condition is present.

Abstract: The described implementations relate to migrating from a Digital Subscriber Line (DSL) system implementing Plain Old Telephone Service (POTS) equipment that handles analog communication signals to a DSL system that implements All Digital (AD) enabled equipment capable of handling DSL data and Internet Protocol (IP) telephony traffic.

Abstract: Systems and methods are disclosed for allowing a monitoring party to have intermediary control over a communication between a calling party and a called party. A notification may be sent to a monitoring party of an incoming communication attempt to a called party, and the monitoring party may control the routing and/or processing of the communication based on a real-time response to the notification.

Abstract: Methods, systems, and products provide emergency location services for mobile devices. A communication is received to a 911 emergency address. A code is received during the communication to block emergency location services. The emergency location services are blocked in response to the code.

Abstract: A system for alternately transmitting an audio signal and a video signal over a single voice grade telephone line is disclosed. The system includes an apparatus located at a subscriber location which establishes a first communication connection between a user at the subscriber location and a dispatcher at a dispatch station, over which first communication connection transmission of voice signals are enabled to be simultaneously transmitted between the subscriber's premise and the dispatcher, and which disestablishes the first communication connection and establishes a second communication connection over which a continuous video signal is transmitted from the subscriber location to the dispatcher.

Abstract: A method and system for initiating an incident-specific request for assistance from a citizen call station by touching a sequence of positions on a display screen. The citizen call station comprises a display having a touch-responsive mechanism for entering a call sequence of statements including initiating an alert, reporting a concern, and selecting help needed. A transmission mechanism for transmitting the call sequence to a control location is provided. A confirmation of the request, sent from the control location, may be received at the call station. The call station may also deliver information from a central location. The call station may include cameras, various sensors, two-way communications, and may be used to provide information on demand, outside of the normal security concerns.

Abstract: A system and method for processing a call between a caller and a live agent is provided. A stream of verbal speech utterances is received from the caller and converted into text. Text messages are received from the agent in response to the stream of verbal speech utterances and converted into synthesized speech utterances. The synthesized speech utterances are provided to the caller. A record of the call is processed and presented to a further live agent for manipulation. The manipulated record is stored.

Abstract: A system and method for providing private information content to a voice telephone call parties prior to, during or following a call. In one aspect, the system and method may be implemented in a voice telephone communication apparatus that is adapted to hold information content in an information store on behalf of the call party, gather information that is private to the call party and add it to the information store as part of the information content, and retrieve the information content from the information store and present it to the call party in response to an information presentation initiation action. In another aspect, the system cooperates with a premises or equipment monitoring system, such as a security system, to provide monitoring information to a telephone call party.

Abstract: The present invention allows a user to screen messages being left at a hosted voicemail system from a telephone terminal. Incoming calls intended for the telephone terminal are routed to the voicemail system immediately or after attempting to connect incoming call to the telephone terminal. As the caller is leaving a message at the voicemail system, a connection between the incoming call, voicemail system, and telephone terminal is established to allow the user to listen to the message and decide whether to take the call. The user may decide to take the call or let the caller finish leaving the message. In one embodiment, the telephone terminal is equipped to open only the speaker channel for monitoring the message and will provide a fully bi-directional connection if the user takes the call. The supporting switch and telephone terminal communicate with each other to facilitate the monitoring and taking of calls.

Abstract: A method for providing a communication assistance service by a communication assistance service provider includes receiving a communication at the communication assistance service provider from a first person seeking a contact information to communicate with a second person and receiving from the first person identifying information associated with the second person. A profile of the second person is retrieved including at least one contact information and at least one contact preference associated with the contact information. Communication is provided between the first person and the second person in accordance with the contact preferences.

Abstract: An alert method and system permits an alert to be provided to a subscriber. Such alerts may comprise icons or graphical advertising units that may be navigated by the subscriber to trigger and initiate corresponding and dynamically updatable communications and communication links.

Abstract: An alert method and system permits an alert to be provided to a subscriber. Such visual alerts may comprise icons or graphical advertising units that may be navigated by the subscriber to trigger and initiate corresponding and dynamically updatable communications and communication links.

Abstract: There is described a method and telecommunication server for maintaining communication between at least two devices. A first incoming call for a first communication device is received at the communication server. The first incoming call for the first communication device is routed to a second communication device associated with the first communication device. A park data signal is received from the second communication device for placing a call to park. The call is placed to park and a park reminder message is sent to the first communication device.

Abstract: A voice traffic gateway including: a voice traffic input, a voice traffic output, a first domain router, non-secure warning (NSW) tone application apparatus and a signalling filter. The input receives voice traffic including voice messages and signalling messages from a first traffic domain. The output delivers output voice messages and signalling messages to a second, different traffic domain. The first domain router routes voice messages to the NSW apparatus and routes signalling messages to the signalling filter. The NSW apparatus applies a NSW tone to a received voice message to form an output voice message. The signalling filter compares a feature of a received signalling message with a reference feature. The signalling filter will pass a signalling message if the signalling message feature is the same as the reference feature and will block a signalling message if the signalling message feature is not the same as the reference feature.

Abstract: A method of analyzing speech application performance can include determining a call path for each of a plurality of calls from a log of an interactive voice response system having a speech application. Each call path can be defined by an ordered set of dialog nodes of the speech application. A number of occurrences of at least one selected type of event for the dialog nodes of the plurality of calls can be counted. At least one call path from the plurality of call paths can be indicated according, at least in part, to the number of occurrences of the selected type of event within the at least one indicated call path.

Abstract: Systems, methods and apparatus are presented for facilitating account-based transactions. In an embodiment, the method includes associating a first person with an account, associating a second person with the account, receiving a request from a third party to authorize a transaction between the second person and the third party, determining a first communication address of the first party, and contacting the first party. The process also includes determining that the first person desires to communicate with the second person, determining a second communication address of the second person, initiating a communication between the first person and the second person, and receiving a signal from the first person that authorizes the transaction or declines the transaction.

Abstract: Techniques are provided for sending and receiving key frames and key frame request messages. At a video conference bridge, a key frame request message is received from a first endpoint device. The key frame request message comprises a request for a key frame from a second endpoint device. When a prior key frame request message is received before the key frame request message, a key frame request time value is determined that corresponds to an amount of time between receiving the key frame request message and receiving the prior key frame request message. This value is compared to a threshold time value. When the key frame request time is greater than the threshold time, a key frame request forwarding message is generated, and the key frame request forwarding message is sent to the second endpoint device to request the key frame from the second endpoint device.

Abstract: A system and method for providing information local to a called party located in a different geographic location may include storing information and telephone number identifiers as associated with remote geographic locations. In response to a telephone number being dialed, a determination may be made as to whether a portion of the dialed telephone number matches a stored telephone number identifier. If a portion of the dialed telephone number matches a stored telephone number identifier, at least a portion of the information associated with the matched telephone number identifier may be presented to a user. Otherwise, information associated with a portion of the dialed telephone number that identifies a geographic location from a communications network may be requested and presented to the user.

Abstract: An Electronic Document Answering Machine is adapted to connect to remote information sources and to download digital documents including e-mail and WEB pages, and to store the documents for later review by a user. The Answering machine has an alert device for alerting a user that new documents are available for review, and an initializing device for a user to cause documents to be communicated for review one-at-a-time. In a preferred embodiment documents are communicated over a speaker via voice synthesis. In an alternative preferred embodiment a small display is provided wherein documents may be displayed in alphanumeric characters. The answering machine can be implemented as a stand-alone device or can be connected via a serial port to a host PC for transferring documents to the PC for processing and review. In other embodiments the Answering Machine is implemented as a system in a PC, with alert and selective input added as an interface.

Abstract: A method is described of providing validation data associated with a subscriber line of a telecommunication network. The method includes obtaining line data of the subscriber line wherein the line data is suitable for interrogating a line identification database (LIDB). The method interrogates the LIDB with the line data to obtain reference subscriber data associated with the line data, and processes the reference subscriber data to obtain validation data associated with the subscriber line. The invention extends to a subscriber line validation system to validate a subscriber line of a communication network.

Abstract: Method for providing caller information during a telephony ringing signal, including the procedures of storing caller information, associated with at least one of a caller and a callee, on a caller information server, installing a client application on a callee device, dialing a callee device CLI by the caller, identifying a caller device CLI by the callee device, contacting the caller information server by the callee device and providing the caller information server with at least one of the caller device CLI and the callee device CLI, retrieving, by the callee device, from the caller information server the caller information associated with at least one of the caller and the callee according to at least one of the caller device CLI and the callee device CLI, and presenting, on the callee device, the retrieved caller information.

Abstract: Systems and methods that enable high quality audio teleconferencing are disclosed. In one embodiment of the present invention, a signal processor receives signals from a spatially dispersed set of directional microphones, processing the microphone signals and the far-end received audio into a signal for transmission to a far-end party. The processing may comprise the use of one or more algorithms that reduce conference room noise and may selectively increase participant audio levels by processing the microphone signals using beamforming techniques. An embodiment of the present invention may also comprise one or more omni-directional microphones that may be used in cooperation with the directional microphones to adjust for background noise, acoustic echo, and the existence of side conversations.

Abstract: Implementing a location and historical trend based quality of session in unified telephony can begin with establishing a conference call. The location of each end-user device can be determined and a query of a previously established data store with historical trend data for quality of session for each end-user device based on the location of an identifier for the end user device can be performed. If the results of the querying indicate that an end-user device has a relatively low quality of session below a baseline established for the conference call, a corrective action designed to ensure the conference call is conducted with a quality of session at or above the baseline can be performed. Alternatively, the location and historical trend data and analysis for the collaboration session can be presented to a human moderator, who can be prompted to select a desired corrective action.