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570 results about "Signal mapping" patented technology
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Single sideband and quadrature multiplexed continuous phase modulation
InactiveUS20070092018A1Error preventionSecret communicationCommunications systemFrequency-division multiplexing
A class of bandwidth reduction techniques are used develop a broad class of modulation types collectively called SSB-FM. These signals can be used to construct communication systems that provide bandwidth-normalized performance gains of 10 dB or more when compared to popular prior art modulation methods. An aspect of the invention involves mapping trellis paths in a complex signal space onto corresponding real-valued trellis signals with desirable spectral properties. The invention can be used map continuous phase modulated (CPM) signals onto simpler amplitude-modulated trellis signals having double the channel capacity of prior art CPM signals. Multi-amplitude signaling and frequency division multiplexing may also be incorporated to further accommodate more information per symbol.
Owner:TRELLIS PHASE COMM LP
Method and apparatus for transmitting a reference signal in a wireless communication system
InactiveUS20120002740A1Add equipmentImprove performanceSecret communicationRadio transmissionCommunications systemResource element
A method and an apparatus for transmitting a reference signal in a wireless communication system are provided. A first base station maps a first reference signal to a resource region and transmits the first reference signal to a user equipment. A second base station maps a second reference signal to said resource region and transmits the second reference signal to said user equipment. The resource elements, to which the first reference signal and the second reference signal are mapped in the resource region, are determined in accordance with the index on a Latin square matrix occupied by two different elements, respectively, from among N elements constituting the Latin square matrix with a size of N×N.
Owner:LG ELECTRONICS INC
Method and apparatus for controlling a headphone
A method for controlling a headphone having a microphone for receiving noise and user signals, the received noise being used to reduce noise at an output of the headphone, includes detecting a signal by the microphone; if the signal has a predefined characteristic, the signal is mapped to a control command; and the headphone is operated according to the command.
Owner:THOMSON LICENSING SA
Cooperative Communication and Shared Handoff among Base, Relay, and Mobile Stations in OFDMA Cellular Networks
InactiveUS20080165866A1Multiplex communicationRadio/inductive link selection arrangementsFast Fourier transformSpatial mapping
In a cellular network, symbols are encoded and modulated to produce a modulated signal The modulated signal is mapped to a subcarrier using a spatial mapping matrix. An inverse fast Fourier transform is applied to the mapped signal to produce groups of tones. The groups of tones are transmitting concurrently to multiple receivers using the same channel as orthogonal frequency-division multiplexing access (OFDMA) signals. There is one group of tones for each receiver.
Owner:MITSUBISHI ELECTRIC RES LAB INC
Antenna mapping in a MIMO wireless communication system
InactiveUS20080273452A1Improve transmission performanceImprove system throughputModulated-carrier systemsCode conversionCommunications systemSymbol mapping
A method for transmission is provided to generate a plurality of reference signals for a plurality of antenna ports, with each reference signal corresponding to an antenna port; to map the plurality of reference signals to a plurality of physical antennas in accordance with a selected antenna port mapping scheme, with each reference signal corresponding to a physical antenna, and the plurality of physical antennas being aligned sequentially with equal spacing between two immediately adjacent physical antennas; to demultiplex information to be transmitted into a plurality of stream blocks; to insert a respective cyclic redundancy check to each of the stream blocks; to encode each of the stream blocks according to a corresponding coding scheme; to modulate each of the stream blocks according to a corresponding modulation scheme; to demultiplex the stream blocks to generate a plurality of sets of symbols, with each stream block being demultiplexed into a set of symbols; to map the plurality of sets of symbols into the plurality of antenna ports in accordance with a selected symbol mapping scheme; and to transmit the plurality of sets of symbols via the corresponding antenna ports, with each set of symbols being transmitted via a subset of antenna ports, with, within each subset of antenna ports, the distance between the physical antennas of the corresponding antenna ports being larger than the average distance among the plurality of physical antennas.
Owner:SAMSUNG ELECTRONICS CO LTD
Spending processing method for service integration in OTN network
InactiveCN1770673ASimple meansSimple processing methodOptical multiplexLow speedInformation transmission
This invention relates to digital information transmission OTN network business compound expenditure process method, which comprises the following steps: a, dividing the OTN frame OPU net load area in low speed business signal mapping and compound OTN; b, indicating OPU net load area division, dispatching and relative customer business type and the OPU net load area is divided into several same time gaps and adopting alliance sequence MFAS relative net load structure to indicate FSI each time gap to relative customer terminal and relative customer business type information; dividing the OPU customer terminal and relative customer business type and using the OPU expenditure to express relative customer business sub-block position information.
Owner:HUAWEI TECH CO LTD
Downlink mode of transmission, network devices and wireless device in the coordinated multiple-point transmission systems
InactiveCN101777941AExpand effective coverageResolve mutual interferenceSite diversityNetwork traffic/resource managementTelecommunicationsTransport system
The invention discloses a downlink mode of transmission, network devices and a wireless device in the coordinated multiple-point transmission systems. The method includes the following steps: make clear the correspondent downlink physical resources and downlink mapping rules to the established sending physical downlink data channel and / or reference signal of the cooperation community. The downlink channel and / or reference signal are mapped to the downlink physical resources according to the downlink principles and then delivered to the terminals. The embodiment of the invention can expand the effective coverage, and to avoid interference between different communities.
Owner:HUAWEI TECH CO LTD
Apparatus and method for changing signal mapping rule in a hybrid automatic repeat request system
InactiveUS20060036922A1Increase the minimum Euclidean distanceIncrease the Euclidean distanceError prevention/detection by using return channelTransmission systemsAutomatic repeat requestComputer science
An apparatus and method for changing a signal mapping rule in an hybrid automatic repeat request (HARQ) system are provided. In a transmitter in an automatic repeat request (ARQ) system according to the present invention, a memory stores different signal constellations for a predetermined modulation scheme according to retransmission numbers (k). A modulator reads a signal constellation according to a current retransmission number from the memory, upon receipt of a retransmission request signal from a receiver, and modulates transmission data to complex symbols on the signal constellation.
Owner:SAMSUNG ELECTRONICS CO LTD
Method of decoding two-channel matrix encoded audio to reconstruct multichannel audio
InactiveUS7003467B1Precise positioningImprove performancePseudo-stereo systemsSpeech synthesisVocal tractComputer science
The present invention provides a method of decoding two-channel matrix encoded audio to reconstruct multichannel audio that more closely approximates a discrete surround-sound presentation. This is accomplished by subband filtering the two-channel matrix encoded audio, mapping each of the subband signals into an expanded sound field to produce multichannel subband signals, and synthesizing those subband signals to reconstruct multichannel audio. By steering the subbands separately about an expanded sound field, various sounds can be simultaneously positioned about the sound field at different points allowing for more accurate placement and more distinct definition of each sound element.
Owner:DTS
Method and apparatus of transmitting data in mbsfn subframe in wireless communication system
InactiveUS20110299449A1Efficient use ofBroadcast transmission systemsPilot signal allocationMultimedia Broadcast Multicast ServiceCommunications system
A method and apparatus of transmitting data in a Multimedia Broadcast multicast service Single Frequency Network (MBSFN) subframe in a wireless communication system is provided. A base station (BS) transmits a physical downlink control channel (PDCCH) to a user equipment in a first orthogonal frequency division multiplexing (OFDM) symbol, transmits reference signals for a plurality of extended antenna ports to the user equipment in a second OFDM symbol by mapping the reference signals to subcarriers, and transmits a physical downlink shared channel (PDSCH) to the user equipment in the second OFDM symbol by mapping the PDSCH to the remaining subcarriers other than the subcarriers to which the reference signals are mapped.
Owner:LG ELECTRONICS INC
Method and apparatus for sending physics uplink control signal in TDD system
ActiveCN101227233ASolve highFulfil requirementsError preventionRadio/inductive link selection arrangementsTime domainSignal on
The invention provides a method and a device for sending physical uplink control signals in a time-division duplex system, the method comprises following steps: encoding the uplink control signals with a communication channel to obtain coded bits, modulating the coded bits with QPSK to obtain modulation symbols, transforming the modulation symbols with DFT to obtain symbols on a frequency domain,expanding the symbols on the frequency domain with time-domain through adopting a CAZAC root sequence to respectively obtain a first signal and a second signal which are sent on two time slots, mapping the first signal and the second signal on an information symbol which is corresponded with a PUCCH reference signal structure 2, and combining the information symbol and the reference signal into asignal which will be sent by a sub-frame. The invention can well satisfy the performance requirement and the covering requirement that a plurality of ACK / NACK can be sent on an uplink sub frame.
Owner:ZTE CORP
Constrained interleaving for 5G wireless and optical transport networks
InactiveUS20160352419A1Increase data rateIncrease performance rateSpatial transmit diversityPolarisation multiplex systemsCommunications systemAlgorithm
The present invention provides a design framework that is used to develop new types of constrained turbo block convolutional (CTBC) codes that have higher performance than was previously attainable. The design framework is applied to design both random and deterministic constrained interleavers. Vectorizable deterministic constrained interleavers are developed and used to design parallel architectures for real time SISO decoding of CTBC codes. A new signal mapping technique called constrained interleaved coded modulation (CICM) is also developed. CICM is then used to develop rate matching, spatial modulation, and MIMO modulation subsystems to be used with CTBC codes and other types of codes. By way of example, embodiments are primarily provided for improved 5G LTE and optical transport network (OTN) communication systems. Detailed descriptions of embodiments are also provided that combine aspects of MIMO and spatial modulation systems to improve bandwidth efficiency. Such embodiments are applicable to multi-antenna and single antenna MIMO systems as well as multichannel systems, OFDM systems, and TDM systems.
Owner:FONSEKA JOHN P +1
Ep signal mapping-based optical ablation for patient monitoring and medical applications
InactiveUS20090112199A1Good precisionEfficient and reliableElectrocardiographyCatheterLight energyCardiac Ablation
A system and method are disclosed for utilizing a single integrated EP / ablation catheter to treat cardiac arrhythmias. The disclosed catheter combines the EP signal monitoring of a traditional EP diagnostic catheter, and optical energy for the ablation therapy, which is expected to provide a more efficient, accurate and reliable method of cardiac ablation than current RF techniques since it is based on real-time EP signal mapping, with precise pathological tissue localization, cardiac arrhythmia severity characterization and delivers predictable energy doses with continuous safety monitoring of the intracardiac signals.
Owner:SIEMENS MEDICAL SOLUTIONS USA INC
System and method to remotely interact with NANO devices in an oil well and/or water reservoir using electromagnetic transmission
InactiveUS20100102986A1Activation functionConstructionsElectric/magnetic detectionNano-deviceEngineering
The invention provides for electromagnetic transmission and reception used in detecting relative changes associated with nano devices existing within an oil reservoir. The system enables monitoring of the relative movement of the nano devices in the oil and / or water over a given area based on the incremental or relative changes of the intensity of the reflections over time. In one embodiment, a source of electromagnetic energy from an array of antennae transmitting immediately in the far field recharges a power source embedded in the nano devices. In another embodiment, the return signals from the nano devices maps the morphology of ensembles of nano devices. In yet another embodiment the transmission controls the movement of the nano devices and controls the function preformed by the nano devices relative to effecting changes in the well to improve production of oil.
Owner:LOCKHEED MARTIN CORP
Videoconferencing echo cancellers
ActiveUS20060239443A1Two-way loud-speaking telephone systemsTelevision conference systemsRemote systemLoudspeaker
A system may be configured to: receive remote audio signals and corresponding spatial indicators from remote systems; generate output signals for local speakers based on the remote audio signals and the corresponding spatial indicators; supply a microphone input signal to a first echo canceller in a series of echo cancellers, where each echo canceller of the series corresponds to a position in a set of positions along a one-dimensional locus connecting the speakers; map each of the remote audio signals to a corresponding one of the positions based on the corresponding spatial indicator; for each position of the set of positions, combine any of the remote audio signals that map to that position in order to form a corresponding input signal for the corresponding echo canceller; transmit a resultant signal including at least an output of a last echo canceller of the series to the remote systems.
Owner:LIFESIZE INC
Input level adjust system and method
InactiveUS7190292B2Cost effectiveMaximum flexibilityElectric signal transmission systemsGain controlComputer scienceGain cell
A method of matching input amplitudes in a system wherein one or more of a plurality of inputs may be selected, with each input capable of having different characteristics, involving selecting an input signal and mapping the input signal to a predetermined signal amplitude through the use of level matching logic. The level matching logic may include a gain cell for increasing or decreasing the amplitude of the input signal.
Owner:BIZJAK KARL M
Digital television system
InactiveUS20050041749A1Eliminate the problemTelevision system detailsPicture reproducers using cathode ray tubesMultiplexerEngineering
Disclosed is a digital television system carrying out modulation / demodulation by VSB (vestigial side band) . A VSB transmitter includes an additional error correction encoder designed in a manner that a signal mapping of a TCM encoder is considered, a multiplexer (MUX), a TCM encoder operating in a manner corresponding to state transition processes of the additional error correction encoder, and a signal transmission part including an RF converter. And, A VSB receiver includes a signal receiver part receiving a signal transmitted from the transmitter, a TCM decoder, a signal processing part including a derandomizer, and an additional error correction decoder part.
Owner:LG ELECTRONICS INC
System for generating a wideband signal from a received narrowband signal
A system for use in providing a wideband signal from a received narrowband signal is set forth. The system comprises an extracted narrowband feature vector that corresponds to at least one characteristic of the narrowband signal. A narrowband codebook having one or more narrowband codebook index vectors is also employed, where each narrowband codebook index vector is associated with one or more corresponding narrowband codebook parameters. An analyzer is provided to correlate the extracted narrowband feature vector with an entry in the narrowband codebook. More particularly, the analyzer is responsive to the extracted narrowband feature vector to identify the narrowband codebook feature index vector that best matches the extracted narrowband feature vector. A signal mapper is provided to execute a mapping function of the extracted narrowband feature vector and / or the narrowband codebook index vector identified by the analyzer. In executing the mapping function, the signal mapper uses mapping parameters that correspond to the narrowband codebook entry associated with the narrowband codebook index vector identified by the analyzer. The signal mapper generates at least one estimated wideband feature vector through execution of the mapping function. The estimated wideband feature vector is used by a signal generator to generate a wideband signal that corresponds to an extended bandwidth version of the received narrowband signal.
Owner:CERENCE OPERATING CO
Communication system
ActiveUS20040008737A1Error correction/detection using trellis codingTime-division multiplexComputer hardwareCommunications system
A method and apparatus is disclosed for facilitating high-speed data communication. In one embodiment a receiver is configured to include error correction coding in an interleaved environment to increase data transmission rates. In one embodiment the signal mapping scheme includes constellation shaping to reduce transmit power levels. In one embodiment 8-state Ungerboeck trellis coding is implemented with 4-dimensional PAM10 signal mapping.
Owner:MARVELL ASIA PTE LTD
Apparatus and method for pseudo-inverse multiplexing/de-multiplexing transporting
A pseudo-inverse multiplexing / de-multiplexing apparatus and method are disclosed. The pseudo-inverse multiplexing apparatus maps a client signal to an OPUk-Xpv signal. The OPUk-Xpv signal has a payload area that can be segmented into a plurality of tributary slots and an overhead area into which frame configuration information related to the tributary slots is inserted. The pseudo-inverse multiplexing apparatus decides the number of tributary slots to be used to map client signals, according to a bit rate or bit tolerance of the client signals, and maps the client signals using the determined number of tributary slots. Accordingly, it is possible to map or frame a variety of client signals.
Owner:ELECTRONICS & TELECOMM RES INST
Optical harness assembly and method
Owner:ZEPHYR PHOTONICS
Customer signal transmission method in optical transmitting network and related equipment
ActiveCN101291179AIncrease profitImprove flexibility and adaptabilityError preventionTime-division multiplexChannel dataComputer network
The embodiment of the invention provides a client signal transmission method in an optical transport network and relevant equipment, wherein the embodiment of the method comprises the steps of: obtaining the client signal and mapping the client signal to a tributary unit which is preset in the payload area of the optical-channel payload unit OPUk; respectively marking the corresponding tributary unit of each client signal; marking the tributary unit number of the payload area of the OPUk; marking the type of the mapped client signal in the tributary unit; and sending the optical-channel data unit ODUk including OPUk to the OTN network. The embodiment of the invention is capable of establishing transmission channels suitable for client signal rate, thereby improving the utilization ratio of the transmission channels in the process of the CBR transparent transmission and strengthening the flexible adaptability of the OTN equipment to the access service.
Owner:HUAWEI TECH CO LTD
Method and device for transmitting and receiving client signal in optical transport network
ActiveCN102820951AEasy to configureError preventionTime-division multiplexFrequency spectrumReference rate
The inventive embodiment provides a method and a device for transmitting and receiving a client signal in optical transport network, belonging to the field of optical transport network. The transmitting method comprises: mapping the received client signal to a container OTU-N with a variable rate, which is N times the preset reference rate grade, wherein N is a configurable positive integer according to requirement; dividing the container OTU-N with the variable rate into N photon channel transmission units OTUsub according to columns, the rate of each OTUsub being equal to the reference rate grade; modulating the N photon channel transmission units OTUsub to a one-channel or multi-channel optical carrier; and transmitting the one-channel or multi-channel optical carriers on the same optical fiber. The method provided by the invention is adaptive to the change in spectral bandwidth of an optical layer by mapping the client signal to the container OTU-N with the variable rate and by transmitting the OTU-N through the same optical fiber, thereby realizing optimized configuration of the bandwidth resources of the optical transport network.
Owner:HUAWEI TECH CO LTD
IC for universal computing with near zero programming complexity
A computing machine capable of performing multiple operations using a universal computing unit is provided. The universal computing unit maps an input signal to an output signal. The mapping is initiated using an instruction that includes the input signal, a weight matrix, and an activation function. Using the instruction, the universal computing unit may perform multiple operations using the same hardware configuration. The computation that is performed by the universal computing unit is determined by the weight matrix and activation function used. Accordingly, the universal computing unit does not require any programming to perform a type of computing operation because the type of operation is determined by the parameters of the instruction, specifically, the weight matrix and the activation function.
Owner:NVIDIA CORP
Method for particle size and concentration measurement
ActiveUS7746469B2High sensitivityMaterial analysis by optical meansParticle size analysisLight beamParticle interaction
The present invention provides a system and method of particle size and concentration measurement based on providing a focused, synthesized, non-Gaussian laser beam, causing the beam to interact with the particles, measuring the interaction signal and the number of interactions per unit time of the beam with the particles, and using algorithms to map the interaction signals to the particle size and the number of interactions per unit time to the concentration. The particles are fluid borne, airborne, or on a surface and have a size ranging from sub-micron to thousands of microns. In an embodiment of the invention, the focused, synthesized, non-Gaussian laser beam is a dark beam. The measurements can be made using the duration of interaction with a scanning beam, including dark field.
Owner:PARTICLE MEASURING SYST
Method, system and equipment for transmitting uplink reference signals
InactiveCN101741793AReduce CM/PAPRMulti-frequency code systemsMultiple carrier systemsCarrier signalComputer science
The embodiment of the invention discloses a method, a system and equipment for transmitting uplink reference signals. The method comprises: using a Zadoff-Chu sequence to generate a reference signal sequence occupying a plurality of component carriers during uplink multi-carrier polymerization; and mapping the reference signal sequence onto sub-carriers of the component carriers so a to generate and send reference signals. In the embodiment of the invention, the reference signal sequence is generated by use of one ZC sequence, and the reference signal sequence is mapped onto the sub-carriers of the component carriers so as to generate the reference signals when the reference signals are mapped onto the component carriers, so that the aim of reducing uplink reference signal CM / PAPR is achieved.
Owner:HUAWEI TECH CO LTD
Fiber optic internet protocol network interface device and methods and systems for using the same
ActiveUS7099443B2Television system detailsPulse modulation television signal transmissionFiberNetwork interface device
A network interface device located at a customer's premises includes an external interface that receives a plurality of telecommunication services via a fiber optic connection from a telecommunication service provider. The services are received using Internet Protocol. The network interface device also includes at least two distinct internal interfaces that distribute the plurality of telecommunication services to at least two distinct internal transport media. The network interface device also includes a processor that is programmed to receive combined signals comprising the telecommunication services from the external interface, process the combined signals into separate signals representative of distinct telecommunication services, and map each of the separate signals to separate ones of the at least two distinct internal interfaces for distribution at the customer's premises via the internal transport media.
Owner:QWEST
Method and apparatus for encoded signal mapping for multi-carrier communication
InactiveUS20070121742A1Improve communication qualitySimple signal processingCode conversionError correction/detection using multiple codesCommunications systemCommunication quality
A communication quality is improved or signal processing is simplified in a multi-carrier communication system such as OFDM. Information different in communication quality such as systematic bits and parity bits of turbo encoded code words is combined together, and information that requires a high communication quality such as the systematic bits is mapped to carriers having a frequency close to the carriers in which the pilot signal exists used as a reference phase of demodulation than the information such as the parity bits which does not require the high communication quality such as the systematic bits.
Owner:HITACHI LTD
Reference signal mapping method and device
ActiveCN102437986AImprove joint transfer performanceImprove compatibilityMulti-frequency code systemsPilot signal allocationComputer scienceTransmission performance
The invention discloses a reference signal mapping method and a device. The method comprises the following steps that: a maximal systematic bandwidth is used for generating a reference signal sequence; a reference sequence to be mapped is selected from the generated reference signal sequence to be mapped, and the mapped reference sequence is a reference signal sequence corresponding to the maximal systematic bandwidth on the identical resource position. Through the method and the device, the compatibility of the reference signal mapping and coordination transmission is improved, and the coordination combined transmission performance can be further improved.
Owner:ZTE CORP
Method and apparatus for mapping TDM payload data
A method and apparatus includes a DS3 framer (122) receiving a DS3 signal (150) having TDM payload data (152) at a line interface node (102, 104). A logic unit (124) at the line interface node maps the DS3 signal to a packet-based Cframe (156) at the line interface node, wherein the packet-based Cframe includes the TDM payload data (152). The packet-based Cframe having the TDM payload data is distributed over a packet switched backplane (110) using a Common Switch Interface (115) to one or more of a plurality of payload nodes (106, 108, 112).
Owner:EMERSON NETWORK POWER EMBEDDED COMPUTING
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