Abstract: Systems and methods that implement compress-forward (CF) coding with N-PSK modulation for the relay channel are disclosed, where N is greater than or equal to two. In the CF scheme, Wyner-Ziv coding is applied at the relay to exploit the joint statistics between signals at the relay and the destination. Quantizer design and selection of channel code parameters are discussed. Low-density parity check (LDPC) codes are used for error protection at the source, and nested scalar quantization (NSQ) and irregular repeat accumulate (IRA) codes for Wyner Ziv coding (or more precisely, distributed joint source-channel coding) at the relay. The destination system decodes original message information using (a) a first signal received from the source in a first interval and (b) a second signal that represents a mixture of transmissions from the source and relay in the second interval.

Abstract: The carrier-envelope phase in a train of optical pulses is varied utilizing the dispersive properties of lossless plates while the total dispersion in transmission is maintained practically constant. The plates include sloped surfaces and are mounted for displacement such that the ratio of the thicknesses of the two plates through which the optical pulses will pass can be varied by displacing the plates so as to shift the carrier-envelope phase in the optical pulses. In one embodiment, the plates include a barium fluoride wedge and a fumed silica wedge, wherein the wedges are bond together to form a composite structure with thicker and thinner portions of the wedges inversely matched.

Abstract: The present invention provides a peak suppression method, including a first step for detecting characteristic information of a peak part of a transmission signal; and a second step for changing a suppression method for the peak part based on the characteristic information.

Abstract: A data acquisition system includes a programmable gain amplifier, an analog-to-digital converter, a filter, and control circuitry. The programmable gain amplifier is operatively connected to receive an analog input signal on its input and generates an amplified signal on its output in accordance with gain control signals. The analog-to-digital converter is operatively connected to receive the amplified signal from the amplifier and generates a digitized signal on its output. The filter is operatively connected to receive the digitized signal from the converter and generates a filtered digital signal on its output. The control circuitry is operatively connected to the amplifier and to the converter and is also responsive to the gain control signals for dynamically adjusting power between the amplifier and converter when the gain control signals are changed.

Abstract: In an apparatus and method for providing transmit (Tx) diversity in a multi-antenna wireless communication system, Tx diversity is provided by estimating a channel to each antenna using a signal received from the antenna, estimating channel state information (CSI) from the first Tx node to each antenna using the estimated channel, and determining a signal to be transmitted to the antennas in different methods according to whether phase compensation is required for information to be transmitted using the estimated channel and the CSI.

Abstract: This invention relates to apparatus, methods, processor control code and signals for channel estimation in OFDM (Orthogonal Frequency Division Multiplexed) communication systems with a plurality of transmitter antennas, such as MIMO (Multiple-input Multiple-output) OFDM systems. An OFDM signal is transmitted from an OFDM transmitter using a plurality of transmit antennas. The OFDM signal is adapted for channel estimation for channels associated with said transmit antennas by the inclusion of orthogonal training sequence data in the signal from each said antenna. The said training sequence data is derived from substantially orthogonal training sequences of length K for each said transmit antenna, said orthogonal training sequences being constructed such that a minimum required sequence length K needed to determine a channel estimate for at least one channel associated with each said transmit antenna is linearly dependent upon the number of said transmit antennas.

Abstract: It is an object of the present invention to provide a receiver which, when receiving a digital broadcast, can shorten a time necessary for performing an initial synchronization. The receiver comprises: a front end which receives an OFDM-modulated digital broadcast and outputs modulation signals Sch1 and of at least two channels, which modulation signals and are contained in the digital broadcast; a channel decoder which receives one modulation signal Sch1 through an A/D converter and obtains an initial synchronism to decode the modulation signal; a channel decoder which receives the other modulation signal through an A/D converter and obtains an initial synchronism to decode the modulation signal. The channel decoders, upon obtaining initial synchronisms, will mutually output and share synchronism signals.

Abstract: In order to provide a circuit arrangement (100; 100?; 100?) for use in a data transmission system comprising at least one input stage (IS) being connected downstream of at least one bus system (CB), in particular of at least one C[ontroller]A[rea]N[etwork] bus system, the input stage (IS) comprising at least one resistive ladder (RL) for dividing the input signals; and at least one amplifier stage (AS) connected downstream of the input stage (IS), as well as a corresponding method with improved common mode range and with better H[igh]F[requency] performance, it is proposed that that the voltage range of the amplifier stage (AS) is limitated to a defined maximum voltage, in particular to the supply voltage (VCC).

Abstract: A frequency shift keying (FSK) demodulator includes a band-pass filter, an auto-calibration loop, a phase comparator, and an analog-to-digital converter. The band-pass filter is used for shifting phase of an FSK signal to generate a revised FSK signal. The auto-calibration loop is coupled to the band-pass filter for adjusting a center frequency of the band-pass filter. The first input end of the phase comparator is coupled to an output end of the band-pass filter, and the second input end of the phase comparator is used for receiving the FSK signal. The phase comparator is used for comparing the FSK signal with the revised FSK signal and outputting a comparison result. The analog-to-digital converter is coupled to the phase comparator for converting the results of the phase comparator into digital data. Similarly, a frequency modulation (FM) demodulator includes a band-pass filter, an auto-calibration loop, and a phase comparator.

Abstract: A system having a signal processor for detection of a signal type of a signal has a processor is disclosed. One embodiment is designed to determine a first variable which is characteristic of a first spectrum element of the signal spectrum, and to determine a second variable which is characteristic of a second spectrum element of the signal spectrum, a system for determination of a ratio between the first variable and the second variable, and a detector which is designed to detect the signal type on the basis of the ratio.

Abstract: A digital broadcasting receiving system and method is disclosed. In the data processing method, a known data sequence is tuned so as to be received, when the known data sequence is periodically inserted in valid data and transmitted. Then, the timing error is detected by using a correlation characteristic of the received known data sequence. Thereafter, a timing clock that is in proportion to the detected timing error is created, thereby interpolating the received data.

Abstract: A system includes a differential demodulation module and a correlation module. The differential demodulation module differentially demodulates modulated signals to generate differentially demodulated signals. The correlation module correlates the differentially demodulated signals with derived preamble sequences and generates correlation values.

Abstract: An optimum signal is assembled from a set of data streams originating from a transmitter. Corresponding bits of the data streams are compared, and for each set of corresponding bits, an output bit is selected based on a majority vote of the data streams. If a majority vote does not yield a result, an output bit can be selected from a default stream, or from a stream which yielded a preceding output bit. Data streams having a signal quality below a predetermined limit are disregarded for purposes of conducting the majority vote. The output stream therefore includes bits taken from different data streams and different times, and has a quality greater than is achievable by any one of the original data streams.

Abstract: A receiver (20) that is suitable to receive at least two, simultaneously transmitted signals uses a linear equalizer (18) for equalizing the received signals. Additionally such receiver has a signal quality estimator (36) to determine which of the equalized signals has the best signal to noise ratio. A noise estimator (31) derives a correlated noise signal (n1, n2) from equalized signal having the best signal to noise ratio. This correlated noise signal (n1,n2)is used to cancel the correlated noise with another of the equalized signals, so as to improve the signal to noise ratio of that signal.

Abstract: A constant false alarm rate (CFAR) filter for a communication system receiver, that is subject to relative motion with respect to a transmitter, includes a knowledge-aided CFAR controller. The knowledge-based CFAR controller adaptively adjusts the filter's CFAR threshold to a value that is effective to mask, as false alarms, selected received signals associated with operating conditions where signal detection is expected or known to be difficult or effectively impossible, so as to prevent such false alarms from being coupled to a post CFAR filter signal processor.

Abstract: In a wireless communication system, a method and apparatus switches operating modes of a receiver receiving data and operating in a first mode. The method comprises determining whether a criteria is met to switch the operating mode of the receiver. The operating mode of the receiver is switched from the first mode to a second mode if the criteria is met.

Abstract: An identities collaboration system that comprises a Personal Service Provider (PSP) system for supplying specific user related personal service(s); means for assigning two different data files to each user opting-in to the PSP system, wherein one data file contains data representing user identity at the PSP system and it assigned on a first domain, and the other data file(s) contains data representing the information regarding whether the user is opted-in, or another identity number that is related to the user identity at the PSP, and is assigned on a second domain.

Abstract: Disclosed is a system and method for improving the linearity of a clock and data recovery (CDR) circuit. A data stream is received and the phase of a clock signal is adjusted using two interpolators. The data stream is then recovered using the clock signal.

Abstract: An integrated circuit device includes a delay circuit, sampling circuit and delay control circuit that cooperate to carry out adaptive timing calibration. The delay circuit generates a timing signal by delaying an aperiodic input signal for a first interval. The sampling circuit samples a data signal in response to the timing signal to generate a sequence of data samples, and also samples the data signal in response to a phase-shifted version of the timing signal to generate a sequence of edge samples. The delay control circuit adjusts the first interval based, at least in part, on a phase error indicated by the sequence of data samples and the sequence of edge samples.

Abstract: A method for converting a sample rate in a Software Defined Radio (SDR) communication system is provided. The method includes setting a sampling frequency range depending on a maximum sampling frequency and a minimum sampling frequency so as to enable support of a plurality of sample rates; if a required sampling frequency is set, determining a control value for converting the maximum sampling frequency to the required sampling frequency; and receiving a signal having the maximum sampling frequency, and converting the signal having the maximum sampling frequency to a signal having the required sampling frequency depending on the control value. The control value is determined taking into account a maximum sampling frequency for setting the sampling frequency range.

Abstract: An apparatus for producing a radionuclide includes a target chamber, a particle beam source operatively aligned with the target chamber, and a regenerative turbine pump for circulating a target fluid through the target chamber via first and second liquid transports. During bombardment of the target liquid in the target chamber by the particle beam source, the target liquid is prevented from reaching vaporization due to the elevated pressure within the target chamber and/or the rapid flow rate through the target chamber. A cooling system can be provided to circulate coolant to the first and second liquid transport conduits, the target chamber and the pump to ensure that the target liquid is cooled upon recirculation back into the target chamber.

Abstract: A low frequency timing circuit is used to reestablish a timing signal in a high-frequency timing circuit after the high frequency timing circuit has lost and regained power. The timing of the low frequency circuit is measured against the timing of the high frequency circuit before the high frequency circuit has lost power. The low frequency circuit then is used to measure time after the high frequency circuit has lost power. Once the high frequency circuit has regained power, its timing signal is reestablished at an appropriate time based on a time measurement obtained from the low frequency circuit.

Abstract: A shift register circuit including a first shift register unit, a second shift register unit, a third shift register unit, and a fourth shift register unit connected in serial. The second shift register unit includes an output terminal, and a pull down system pulling the voltage of the output terminal of the second shift register unit according to a pull down signal. The fourth shift register unit includes a third switch and a fourth switch. The fourth switch has a control terminal electrically coupled to the second terminal of the third switch and the pull down unit. The fourth shift register unit generates the pull down signal according to the voltage level of the connecting point between the third switch and the fourth switch.

Abstract: A unit shift register includes first and second transistors for supplying low supply voltage to an output terminal. First and second control signals which are complementary to each other are input to first and second control terminals, respectively. A third transistor is connected between the first transistor and first control terminal, and a fourth transistor is connected between the second transistor and second control terminal. The third and fourth transistors each have its drain connected to the gate of each other in a crossed manner.

Abstract: A method for real-time target reconstruction from target image projections including dividing an object into external and internal sub-objects, acquiring external sub-object data, acquiring internal projections, each internal projection including an internal-internal projection which is the projection of the internal sub-object only as if the external sub-object is null, and an internal-external projection which is the projection of the external sub-object only as if the internal sub-object is null, using the external sub-object data to estimate internal-external projections, subtracting the estimated internal-external projections from the acquired internal projections to obtain internal-internal projections, and reconstructing the internal sub-object from the internal-internal projections.

Abstract: A system and method for image reconstruction is disclosed. The method divides iterative image reconstruction into two stages, in the image and Radon space, respectively. In the first stage, filtered back projection and adaptive filtering in the image space are combined to generate a refined reconstructed image of a sinogram residue. This reconstructed image represents an update direction in the image space. In the second stage, the update direction is transformed to the Radon space, and a step size is determined to minimize a difference between the sinogram residue and a Radon transform of the refined reconstructed image of the sinogram residue in the Radon space. These stages are repeated iteratively until the solution converges.

Abstract: The X-ray CT apparatus that performs a scan after a pre-scan, comprising a reconstruction part reconstructing the pre-scan image of said subject to be examined from transmission data detected by said detector during said pre-scan, and also reconstructing the scan image of said subject to be examined from the transmission data detected by said detector during said scan; and a scan controlling part initiating a scan by directly changing the helical pitch of said bed from the stopped position for said pre-scan to the position toward an ending edge of the reconstruction area of the image. The scan controlling part initiates the scan at a first helical pitch by which X-rays for a predetermined number of views can be emitted at a starting edge of the reconstruction area of the image, and, after X-rays for the predetermined number of views is emitted, the scan at a second helical pitch continues.

Abstract: One or more techniques are provided for adapting a reconstruction process to account for the motion of an imaged object or organ, such as the heart. In particular, projection data of the moving object or organ is acquired using a slowly rotating CT gantry. Motion data may be determined from the projection data or from images reconstructed from the projection data. The motion data may be used to reconstruct motion-corrected images from the projection data. The motion-corrected images may be associated to form motion-corrected volume renderings.

Abstract: In a tomosynthetic image reconstruction method and diagnostic device operating with such a method, a tomosynthetic 3D x-ray image is reconstructed by a discrete filtered back projection from a number of individual digital projection data recorded from different project angles within a restricted angular range, in which at least one filtering is performed with a convolution kernel that, in the local area outside of its central value, corresponds to an exponential function.

Abstract: At least one embodiment of the present application relates to a method and/or an apparatus for determining the concentration of a substance in a body material that is composed of two different material components in an unknown ratio. In an embodiment of the method, two computed tomography pictures from which two image data records are reconstructed are recorded in conjunction with two different spectral distributions of the x-radiation. The x-ray attenuation values for each voxel of the two image data records are decomposed into three material components. The decomposition is performed on the assumption that the x-ray attenuation value xM of the body material without the substance is composed of the x-ray attenuation values xM1, xM2 of the first and second material component in accordance with the following equation: xM=f*xM1+(1-f)*XM2, f being a volume fraction of the first material component in the body material.

Abstract: A method and apparatus for inspecting items for the presence of contraband. Trays may be used to hold items as they move through an inspection station. After use, the trays may be mechanically conveyed back to an entry region of the inspection station so that the trays may be used to move other items. Mechanically conveying the trays may enable increased throughput for inspection stations. A tray return may be constructed from multiple modules positioned to the side of an inspection machine. In use at an airport or other similar facility, the tray return may face a passenger use area at an inspection station. Passengers exiting the inspection station may place trays in the tray return. Passengers entering the inspection station may remove a tray from an end of the tray return at an entrance of the inspection station.

Abstract: The inspection methods and systems of the present invention are mobile, rapidly deployable, and capable of scanning a wide variety of receptacles cost-effectively and accurately on uneven surfaces. The present invention is directed toward a portable inspection system for generating an image representation of target objects using a radiation source, comprising a mobile vehicle, a detector array physically attached to a movable boom having a proximal end and a distal end. The proximal end is physically attached to the vehicle. The invention also comprises at least one source of radiation. The radiation source is fixedly attached to the distal end of the boom, wherein the image is generated by introducing the target objects in between the radiation source and the detector array, exposing the objects to radiation, and detecting radiation.

Abstract: In recording projection images for dual absorptiometry, the optical thickness of an object being examined is determined on the basis of a projection image recorded in a high-energy range, and parameters for recording a projection image in the low-energy range are selected as a function of the determined optical thickness. The ratio between image quality and the radiation dosage of the object being examined can be optimized thereby.

Abstract: An X-ray device having an X-ray source, a high voltage generator supplying power to the X-ray tube and an inverter to generate, at the output end, an AC input voltage for the high voltage generator is disclosed. Provision is made therein for a resonance network to be formed between the inverter and the high voltage generator. This allows transmission of the AC input voltage with low power dissipation and low radiation levels. It also achieves spatial separation of the inverter from the high voltage generator and the X-ray source.

Abstract: A particle therapy system is provided. The particle therapy system includes a radiation chamber having a floor with a plurality of movable segments. A rotatable gantry surrounds the radiation chamber. An examination table is positionable inside the radiation chamber. The movable segments are operable to be driven underneath a floor region bordering on the respective movable segment.

Abstract: Systems and methods for analyzing communications of a contact center are provided. A representative system incorporates a first computer application operative to reconstruct progress of a communication through the contact center such that information corresponding to the progress of the communication is presented to a user.

Abstract: One provides (101) a plurality of private civil defense audiovisual programs, wherein various ones of the plurality of private civil defense audiovisual programs provide private civil defense information regarding both naturally-caused and human-caused civilly-catastrophic events. Taken in the aggregate, this private civil defense information (102) comprises information regarding various elements of a proactive private civil defense posture. One or more dedicated private civil defense-themed television broadcast channels are then employed to transmit (103) these programs.

Abstract: The present invention enables the remote activation of a device by a packet-switched service, e.g., VoIP network service for the purposes of receiving calls identified as urgent from a pre-identified calling party when the device is disabled. The present invention enables registered users to select the calling parties they wish to receive emergency calls from.

Abstract: The present invention is directed to methods, systems and apparatuses for an enhanced voice mail system. The enhanced voice mail system provides integrated access to media rich content such as e-mail, voice mail, fax, video clips, or digital still images accessed from a variety of Internet communities. The enhanced voice mail system provides the ability for a subscriber to participate in the community of activities that the Internet provides via a voice mail box while maintaining the anonymity associated with the Internet. This ability includes the retrieval of information from specific web postings and/or messages intended for the member and retrieval of responses to the web postings. In addition, the enhanced voice mail system provides the capability for developing continuation messages which mix (or superimpose) messages from a plurality of users.

Abstract: Some embodiments provide a touch-sensitive device to receive a bias and to generate touch location information based on the bias, an element to secure a printed medium in contact with the touch sensitive device, the printed medium to depict a plurality of telephone interface controls, a memory to store a telephone interface layout associating one or more of the telephone interface controls with a respective touch location and a respective action, and a processor to receive touch location information from the touch-sensitive device, to determine a telephone interface control based on the touch location information and on the telephone interface layout, to determine an action based on the telephone interface control and on the telephone interface layout, and to perform the determined action.

Abstract: The present invention discloses a system and method for implementing prepaid data services in a mobile communication network. In this system, a Data service Access Control Point (DACP), which is used for fulfilling price confirmation function and fee application function for data services, is added between a Service Control Point (SCP) storing prepaid account information of subscribers and a Prepaid Server/Content of Process Gateway (PPS/CP GW) used for data service charging. In the method of the present invention, by means of the interaction among a Packet Data Service Note (PDSN), a Home Authentication Authorization and Accounting (HAAA) server, the PPS/CP GW, the DACP and the SCP, the SCP deducts the fees from the prepaid account, and the PDSN controls the subscriber to utilize data service according to the fees deducted by the SCP.

Abstract: A method for setting up an account for using a voice service comprising receiving a registration request, including a telephone number or an email address belonging to a user and creating the account by storing the existing email address or the existing telephone number of the user or at least parts thereof within the account as part of the account, which is to be used for identifying the user in case of a call for the user.

Abstract: A communication device outside-connected incoming call indicator and an earphone device having such an incoming call indicator are provided. The incoming call indicator has a first communication port connected to a communication device, which is used to receive the incoming call; and an incoming call indication module used to detect the incoming signal and send out an incoming call indication. The earphone device with the incoming call indicator has a connector, which is used to connect to a communication device provided with an insertion hole, and receive the incoming call signal transmitted from the communication device; an incoming call indicator, which is used to receive the incoming call signal and send out an incoming call indication; and an earphone, which is used to receive and broadcast the voice signals transmitted from the communication device. A signal wire is used to connect the connector, the incoming call indicator, and the earphone.

Abstract: A provisioning server implements a telephony service associated with a user, in which calls involving a directory number of the user are processed in accordance with the telephony service and customized call service data. The provisioning server interfaces a call processor with a web server and an interactive voice response (IVR) platform. The provisioning server includes a first interface for receiving the customized call service data from the web server, and a second interface for receiving at least portion of the customized call service data from the IVR platform. The provisioning server also includes a third interface for sending the customized call service data to be stored in a database accessible to the call processor. An instruction is received over the first interface or the second interface to activate the telephony service, in accordance with the customized call service data, via one of the web server and the IVR platform.

Abstract: A method (300) and apparatus are disclosed for event notification. An apparatus that incorporates teachings of the present disclosure may include, for example, a presence services system (PSS) (102) can have a controller (104) that manages operations of a communications interface (110). The controller can be programmed to monitor (302) presence information of a plurality of communication devices of an end user operating in a communications system, and receive (316) a request from a calendar reminder system (CRS) for access to the presence information. Additional embodiments are disclosed.

Abstract: An animatronic telephone agent consisting of a communications subsystem connected to a wired or wireless telephone network for receiving incoming telephone calls, and a robotic automaton coupled to the communications subsystem and responsive to incoming telephone calls for performing different movements that provide non-verbal visual cues to a human observer that are indicative of the status of each incoming call. The automaton preferably takes the form of an animatronic device that has movable appendages and a face with at least movable eyes or eyelids and which provides visual cues by making gestures and/or exhibiting facial expressions that are indicative of the receipt and progress of incoming calls.

Abstract: Systems and methods for providing location information associated with a calling party are disclosed. Generally, a query is received from a network element. A location associated with a calling party is identified in response to receipt of the query, and an indication of the location is transmitted for delivery to a called party.

Abstract: Distribution of software and configuration data is provided in data networks with a plurality of subscribers in a temporally defined manner. The software or data to be distributed is subdivided into data blocks and a corresponding list is generated. A first data block and the list are sent from a control centre to a first subscriber. Once a pre-determined length of time has passed following the reception of the list, the subscriber demands the missing data blocks from the control centre. The missing data blocks are then sent from the control centre to the subscriber such that the subscriber has a complete set of data blocks and can start an installation.

Abstract: A VoIP-based conferencing system readily handles different protocols, load balance media resources and deals with fail-over situations. The VOIP conferencing system has a gateway coupled to the PSTN (Public Switched Telephone Network). A Voice Server Director (VSD) is coupled to the gateway and performs the control function of the conferencing system. The VSD has a back-to-back user agent. The VSD controls a media server, which mixes the audio (signals), and the media server receives the data portion of a conference call from the gateway. The media server is coupled to a bridge that controls an on-going conference.

Abstract: A system for facilitating to an end-user the recognition of other participants attending a conference call, comprising means attached to the end-user's telephone for receiving signals from the telephone line, means for analyzing the telephone line signals and associating a unique caller identification to each new participant joining the conference call, means for associating with each such caller identification, a unique position in a representation of the conference call, and means for representing to the end-user such unique position for all participants in the conference call.