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44 results about "Repeating waveforms" patented technology
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Repeating waveforms is a technique for digital synthesis common in PC sound cards. The waveform amplitude values are stored in a buffer memory, which is stored in a phase generator. When addressed, the retrieved value is used as the basis of the synthesized sound.
Packet loss concealment for voice over packet networks
ActiveUS20060171373A1Few processing resourceLess resourcesSpeech analysisTime-division multiplexRepeating waveformsPulse-code modulation
A method to reduce memory requirements for a packet loss concealment algorithm in the event of packet loss in a receiver of pulse code modulated voice signals. Packet losses are concealed by using the spectral analysis filter memory to smooth a signal gap and by using a technique for determining a maximum repeatable waveform range instead of using the pitch period to reproduce lost packets. The invention uses fewer processing resources and results in improved performance compared to a packet loss concealment algorithm under G.711 Appendix I standards.
Owner:TELOGY NETWORKS
Encapsulated expanded crimped metal mesh for sealing and EMI shielding applications
ActiveUS8766108B2Avoid distortionPrevent elongationShielding materialsLine/current collector detailsGlass fiberElastomer
A composite gasket for sealing and EMI shielding is provided. The gasket has a resilient conductive mesh sheet embedded with an elastomer gel layer. The conductive mesh is corrugated to provide a series of repeating waveforms, providing the gasket with a lower deflection force, better corrosion resistance, and a higher EMI shielding capability. A second elastomer can be used around the edge portions of the gasket for improved abrasion resistance and increased tensile strength. A fiberglass sheet can be incorporated in the mesh for added reinforcement and support. The gaskets of the invention can be used on external aircraft components, such as external aircraft antenna mounts.
Owner:PARKER INTANGIBLES LLC
Assembling type pre-stress honeycombed ribbed web steel beam
ActiveCN103255877AImprove mechanical performanceImprove stabilityGirdersJoistsRepeating waveformsButt joint
The invention relates to an assembling type pre-stress honeycombed ribbed web steel beam and belongs to the technical field of a building section bar. The assembling type pre-stress honeycombed ribbed web steel beam is formed by assembling two butt-joint pre-stress ripple web ribbed steel channel beam webs through bolts. Each pre-stress ripple web ribbed steel channel beam is formed by a top flange, a web, a bottom flange, a pre-stress cable, transverse stiffening ribs, anchorage devices and beam end plates. A section die of the pre-stress ripple steel channel beam web is formed by the top flange, the bottom flange and the web; the section of the web is in a uniform or non-uniform periodically-repeated waveform; the transverse stiffening ribs are vertically placed among the two flanges and the web; the beam end plates are parallel to the transverse stiffening ribs and are arranged at the two ends of the beam; and the pre-stress cable is tensioned and then is fixed on the beam end plates through the anchorage devices. The assembling type pre-stress honeycombed ribbed web steel beam disclosed by the invention is a novel assembling type pre-stress steel beam which is applicable to an assembling type steel structure system, particularly a large-span multi-story assembling type steel structure system; and compared with a conventional assembling type beam, the steel beam has the advantages of light self weight, high bearing capability, great span and the like.
Owner:BEIJING UNIV OF TECH +1
Encapsulated expanded crimped metal mesh for sealing, EMI shielding and lightning strike applications
ActiveUS8759692B2Prevent distortion and elongationShielding materialsLine/current collector detailsRepeating waveformsGlass fiber
Owner:PARKER INTANGIBLES LLC
Base station apparatus, communication terminal apparatus, communication system, and communication method
InactiveUS20080170633A1Reduce transmission lossData augmentationTransmission path divisionAmplitude-modulated carrier systemsRepeating waveformsCommunications system
A base station apparatus, communication terminal apparatus, communication system, and communication method are provided that enable the data part transmission amount to be increased, that are resistant to frequency selective fading, and that enable a BS with low transmission loss to be selected. An OFDM transmitting apparatus 100 sets a power measurement pilot as one OFDM symbol in one frame, assigns power measurement pilot subcarrier numbers to base station apparatuses, and transmits a power measurement pilot according to common frame timing among the base station apparatuses, and a communication terminal apparatus 200 is equipped with an autocorrelator 210 that outputs a symbol synchronization signal, an autocorrelator 220 that finds an autocorrelation characteristic of a repeat waveform part that is a repetition of the same waveform having a cycle of ½ effective symbol length or a waveform with the sign reversed having a cycle of ½ effective symbol length from a received power measurement pilot, and an in-phase averaging section 230 that performs in-phase averaging in frame units of an autocorrelation characteristic of the repeat waveform part and detects the positional frame timing of a power measurement pilot on the time axis.
Owner:SOCIONEXT INC
Fabricated honeycomb web steel beam
ActiveCN103233551AImprove mechanical performanceReduce thicknessGirdersJoistsRepeating waveformsSheet steel
The invention relates to a fabricated honeycomb web steel beam, and belongs to the technical field of building profiles. The fabricated honeycomb web steel beam is formed by web plates of two corrugated web steel channel beams, which are butted and assembled through a bolt. The section opening of each corrugated web steel channel beam is formed by an upper flange, a lower flange and a web plate; the sections of the web plates form even or uneven periodic repeated waveforms; the corrugated sections are rectangular curves, or arc angle rectangle curves, or trapezoidal curves or arc angle trapezoidal curves, or wedge curves, or arc angle wedge curves, or sine curves; the flanges are plain plates; each upper flange is parallel to each lower flange; the web plates are vertically located between the flanges as a whole; the outer sides of the corrugated curves of the web plates along the length direction are flush to a side boundary of each flange along the length direction; and the web plates are connected with the flanges by a single-side angle welding line. The fabricated honeycomb web steel beam is an innovation-type steel beam suitable for the fabricated steel structure system. Compared with the traditional fabricated beam, the fabricated honeycomb web steel beam has the advantages of light dead load, high carrying capacity, and good mechanical behavior.
Owner:BEIJING UNIV OF TECH +1
Assembly type ripple web plate occluded steel beam
ActiveCN103290992AImprove mechanical performanceReduce thicknessGirdersJoistsRepeating waveformsButt joint
The invention relates to an assembly type ripple web plate occluded steel beam which is prepared from two ripple steel channel beams assembled together through occlusion and butt joint of web plates and through bolts. A cross section mouth of each ripple steel channel beam is composed of an upper flange, a lower flange and one web plate, wherein the cross sections of the web plate form a uniform or nonuniform periodically-repeating waveform, the cross section of ripples of the web plate is a rectangular curve, an arc angle rectangular curve, a trapezoid curve, an arc angle trapezoid curve, a wedge-form curve, an arc angle wedge-form curve or a sine curve, the flanges are steel plates, one edge of each flange in a length direction is a waveform curve with a shape similar to that of the curve of the cross sections of the web plate, the upper flange is parallel to the lower flange, the web plate is perpendicular to and located between the upper flange and the lower flange, the waveform curve edges of the flanges are connected with the ripple cross sections of the web plate, and the web plate is connected with the flanges through single-sided angle welding. The assembly type ripple web plate occluded steel beam provided by the invention is applicable to innovative steel beams in an assembly type steel structure system; and compared with traditional assembly type steel beams, the assembly type ripple web plate occluded steel beam has the advantages of light weight, high carrying capacity and good bearing performance.
Owner:CHINA RAILWAY CONSTR GRP BEIJING ENG CO LTD +1
HYPERFINE INTERPOLATED RANGE FINDING FOR CW LIDAR, RADAR, and SONAR USING REPEATING WAVEFORMS AND FOURIER TRANSFORM REORDERING
InactiveUS20160047891A1High data rateHigh data resolutionDigital computer detailsSpeed measurement using gyroscopic effectsRepeating waveformsData combination
Systems, methods, and devices may enhance the apparent sample rate of data collected using Nyquist sampling from a system, such as Continuous Wave (CW) Light detection and ranging (“Lidar”), Radio detection and ranging (“Radar”), or Sound Navigation and Ranging (“Sonar”), that has been modulated with a repeating waveform, such as linear swept frequency, by reordering of the data in the frequency domain. The enhancement of the apparent sample rate may result in a highly interpolated range profile where the data resolution may be enhanced by a factor equal to the number of repeats in the signal being processed, and may result in a highly detained range measurement with a high precision. The various embodiments may combine data from multiple modulation repeats into a single highly interpolated pulse, which may result in a real-time finer range measurement from CW Lidar, Radar, or Sonar systems.
Owner:NASA
Apparatus, system, and method for detecting physiological movement from audio and multimodal signals
PendingUS20210275056A1Function increaseTransducer detailsAcoustic sensorsRepeating waveformsSound generation
Methods and devices provide physiological movement detection with active sound generation. In some versions, a processor may detect breathing and / or gross body motion. The processor may control producing, via a speaker coupled to the processor, a sound signal in a user's vicinity. The processor may control sensing, via a microphone coupled to the processor, a reflected sound signal. This reflected sound signal is a reflection of the sound signal from the user. The processor may process the reflected sound, such as by a demodulation technique. The processor may detect breathing from the processed reflected sound signal. The sound signal may be produced as a series of tone pairs in a frame of slots or as a phase-continuous repeated waveform having changing frequencies (e.g., triangular or ramp sawtooth). Evaluation of detected movement information may determine sleep states or scoring, fatigue indications, subject recognition, chronic disease monitoring / prediction, and other output parameters.
Owner:RESMED SENSOR TECH
Waveform measuring instrument using equivalent time sampling
InactiveUS6909979B2Good reproducibilityAnalogue/digital conversionElectric signal transmission systemsMemory addressRepeating waveforms
The present invention is intended to provide a waveform measuring instrument whose waveform reproducibility in the equivalent time sampling system is improved.The present invention is characterized by that, in a waveform measuring instrument configured so that the repeated waveform data items are acquired and sent to the acquisition memory by means of the equivalent time sampling, the above acquisition memory is divided into a plurality of time slot regions corresponding to the interval of equivalent time sampling and a plurality of memory address groups is assigned to each time slot region.
Owner:YOKOGAWA ELECTRIC CORP
Method and apparatus of transmitting PLCP header for sub 1 GHz communication
Method and apparatus of transmitting PLCP header for sub 1 GHz communication is disclosed. A method of transmitting a physical layer convergence protocol (PLCP) header may comprise generating a short training field (STF) sequence over 1 orthogonal frequency division multiplexing (OFDM) symbol, transforming the STF sequence to repeated waveform patterns in time domain and transmitting the PLCP header comprising the STF sequence, wherein the STF sequence may be a sequence transformed to repeated waveform patterns in time domain by inverse discrete Fourier transform (IDFT).
Owner:LG ELECTRONICS INC
Systems and Methods for Performing Synthetic Aperture Radar Imaging Using Superchirps
Synthetic aperture radar (SAR) imaging systems that transmit repeated waveforms based upon pseudonoise sequences to generate SAR imaging data in accordance with various embodiments of the invention are disclosed. A synthetic aperture radar in accordance with one embodiment of the invention includes: a transmitter configured to transmit superchirps, where the superchirp is generated by convolving a kernel with a pseudonoise modulated impulse sequence having a flat power spectrum; a receiver configured to receive backscatters of transmitted superchirps and digitize the received backscatters; and signal processing circuitry configured to perform matched filtering on digitized backscatters.
Owner:PLANET LABS PBC
Packet loss concealment for voice over packet networks
A method to reduce memory requirements for a packet loss concealment algorithm in the event of packet loss in a receiver of pulse code modulated voice signals. Packet losses are concealed by using the spectral analysis filter memory to smooth a signal gap and by using a technique for determining a maximum repeatable waveform range instead of using the pitch period to reproduce lost packets. The invention uses fewer processing resources and results in improved performance compared to a packet loss concealment algorithm under G.711 Appendix I standards.
Owner:TELOGY NETWORKS
Device for a method of pulsing and amplifying singlemode laser light
InactiveUS6393036B1Good monochromaticityLaser detailsNon-linear opticsRepeating waveformsLaser light
A device for and a method of pulsing and amplifying a singlemode laser light for use in a pulse oscillation laser is disclosed. The device comprises a singlemode laser for generating the laser light of the singlemode, an optical resonator into which the outputted laser light is introduced from the singlemode laser, and a controller for controlling the length of resonator by changing the length of the optical resonator based on a control waveform signal, which is an asymmetrical triangular repeated waveform signal. The laser pulse light of the singlemode to which optical strength is amplified from the optical resonator, is outputted by changing the length of resonator.
Owner:KOBE UNIV
Jitter measurements for repetitive clock signals
ActiveUS20070162240A1Noise figure or signal-to-noise ratio measurementResistance/reactance/impedenceRepeating waveformsStatistical analysis
A system and a method for measuring and quantitatively analyzing the jitter in repetitive electrical signals in a chip using a tester are described. The tester sorts chips based on the jitter measurements, thereby eliminating the need for external instrumentation. The waveform is sampled by the tester at various points of a period over a large number of periods and results are collected. The data is analyzed to determine the total range where the waveform is found to undergo a transition. The transition area is further analyzed to pinpoint the precise location of the transition for each period of the repetitive waveform. The data is used to quantify the jitter by means of statistical analyses, the results of which are used by the tester to sort the chips by comparing the calculated jitter characteristics to predetermined criteria.
Owner:GOOGLE LLC
Maximum time interval error test signal generating apparatus not affected by low-pass measuring filter
InactiveUS6972603B2Error detection/prevention using signal quality detectorCorrect operation testingRepeating waveformsLower limit
An MTIE test signal generating apparatus generates a predetermined MTIE test signal. An MTIE measuring unit includes a low-pass measuring filter having a predetermined high-cut characteristic. A cycle-amplitude setting portion sets a cycle corresponding to an observation time of each of desired plural specific points for a predetermined MTIE characteristic and an amplitude corresponding to a difference in the MTIE value between adjacent specific points. Plural signal generating portions generate plural signals each having the cycle and the amplitude having repetitive waveforms and then outputting to each of the desired plural specific points. A holding time setting portion sets a holding time for holding the upper and lower limit values of the repetitive waveforms over the predetermined time so that a signal cycle having at least the shortest cycle of the plural signals is longer than a predetermined time corresponding to the predetermined high-cut characteristic of the low-pass measuring filter.
Owner:ANRITSU CORP
Fabricated prestressed honeycomb web steel beam
ActiveCN103233550AImprove mechanical performanceImprove carrying capacityGirdersJoistsRepeating waveformsCarrying capacity
The invention relates to a fabricated prestressed honeycomb web steel beam, which is formed by two prestressed corrugated web steel channel beams assembled through a bolt, wherein each prestressed corrugated web steel channel beam is composed of an upper flange, a web plate, a lower flange, a prestressed cable, an anchor gear, and a beam end plate, wherein the section opening of each prestressed corrugated web steel channel beam is composed of the upper flange, the lower flange and the web plate; the section of each web plate forms an even or uneven periodic repeated waveform; the beam end plates are vertically connected with the upper flanges, the web plates and the lower flanges, and are arranged at two ends of each prestressed corrugated web steel channel beam; and the prestressed cable passes through the web plates and the beam end plates, and is fixed on each beam end plate by the anchor gear after being tensioned. The planer arrangement disclosed by the invention forms the honeycomb shape; the optimal result can be obtained in the aspect of overall carrying capacity of a member; the fabricated prestressed honeycomb web steel beam is an innovation-type fabricated prestressed steel beam suitable for a fabricated steel structure system, especially a large-span and multi- and high-rise fabricated steel structure system. Compared with the traditional fabricated beam, the fabricated prestressed honeycomb web steel beam has the advantages of light dead load, high carrying capacity, large span and the like.
Owner:北京市住宅建筑设计研究院有限公司 +1
Encapsulated expanded crimped metal mesh for sealing, EMI shielding and lightning strike applications
ActiveUS20130092410A1Avoid distortionPrevent elongationShielding materialsLine/current collector detailsRepeating waveformsElastomer
A composite gasket for sealing, lightning strike protection and EMI shielding is provided. The gasket has a resilient conductive mesh sheet embedded with an elastomer gel layer. The conductive mesh is corrugated to provide a series of repeating waveforms, providing the gasket with a lower deflection force, better corrosion resistance, protection against lightning strikes and a higher EMI shielding capability. A second elastomer can be used around the edge portions of the gasket for improved abrasion resistance and increased tensile strength. A fiberglass sheet can be incorporated in the mesh for added reinforcement and support. The gaskets of the invention can be used on external aircraft components, such as external aircraft antenna mounts.
Owner:PARKER INTANGIBLES LLC
Phase-locked loop circuitry using charge pumps with current mirror circuitry
InactiveUS20100141491A1High resolutionReduce static phase offsetElectric signal transmission systemsPulse automatic controlRepeating waveformsLoop filter
A system and method for performing phase-locked loop is disclosed. The system includes phase frequency detector circuitry, charge pump circuitry having first current mirror circuitry and second current mirror circuitry, loop filter circuitry, and voltage controlled oscillator circuitry. The phase frequency detector circuitry generates an up signal and a down signal based on the phase difference of an input signal and a feedback signal. The charge pump circuitry includes the first current mirror circuitry and the second mirror circuitry and generates a charge pump output signal based on the up and down signals. The loop filter circuitry generates a filtered control signal based on the charge pump output signal. The voltage controlled oscillator circuitry generates the feedback signal with a repeating waveform based on the filtered control signal.
Owner:CONVERSANT INTPROP MANAGEMENT INC
Phase-locked loop circuitry using charge pumps with current mirror circuitry
InactiveUS20060125535A1Reduce off-state leakageWeakened charge transferPulse automatic controlRepeating waveformsLoop filter
A system and method for performing phase-locked loop is disclosed. The system includes phase frequency detector circuitry, charge pump circuitry having first current mirror circuitry and second current mirror circuitry, loop filter circuitry, and voltage controlled oscillator circuitry. The phase frequency detector circuitry generates an up signal and a down signal based on the phase difference of an input signal and a feedback signal. The charge pump circuitry includes the first current mirror circuitry and the second mirror circuitry and generates a charge pump output signal based on the up and down signals. The loop filter circuitry generates a filtered control signal based on the charge pump output signal. The voltage controlled oscillator circuitry generates the feedback signal with a repeating waveform based on the filtered control signal.
Owner:CONVERSANT INTPROP MANAGEMENT INC
Foreign matter removing apparatus
A foreign matter removing apparatus which removes foreign matter existing on a mounting surface of a printed board unit. The foreign matter removing apparatus includes a holder which holds the printed board unit in its desired attitude, an electromagnetic vibrator which generates continuous shock wave having repeated waveform, and a transmitting plate which transmits the continuous shock wave generated by the shock wave generator to the printed board unit held by the holder.
Owner:FUJITSU LTD
Method and apparatus for editing timing diagram, and computer product
ActiveUS20080077896A1Drawing from basic elementsCathode-ray tube indicatorsRepeating waveformsComputer graphics (images)
A timing diagram is displayed on GUI of a timing diagram editing apparatus. Numerical information indicating the repetition number for which a waveform image within the arbitrary number of clocks is repeated is received, and the repetition number is determined based on the numerical information. A sequence image is displayed on GUI by replaying the waveform image with a continuous waveform image that is formed by repeating the waveform image for the determined repetition number of times.
Owner:FUJITSU LTD
Repetitive waveform generator recirculating delay line
InactiveUS20030198432A1Wave based measurement systemsCoupling light guidesRepeating waveformsEngineering
A recirculating delay line that includes an optical delay circuit generates repetitions of an input signal waveform that is of limited time duration.
Owner:RAYTHEON CO
Assembly type prestress honeycombed ribbed web plate composite beam
ActiveCN103498529AImprove stabilityImprove carrying capacityLoad-supporting elementsRepeating waveformsRebar
The invention relates to an assembly type prestress honeycombed ribbed web plate composite beam. The composite beam is formed by two prestress corrugated web plate and ribbed channel steel composite beams which are in butt joint and are assembled through bolts. Each prestress corrugated channel steel composite beam consists of an upper wing edge, a web plate, a lower wing edge, a reinforced concrete wing plate, a profiling steel plate, a prestress rope, transverse stiffening ribs, anchors and beam end plates; the section mouth profile of each prestress corrugated channel steel composite beam consists of the upper and lower wing edges, the profiling steel plate, the reinforced concrete wing plate and the web plate; the section of each web plate is in an even or uneven periodically repeated waveform; a honeycombed web plate is formed after jointing the two web plates. The composite beam is beneficial to integral assembly of the beam plates to comprehensively improve industrial production level of residences, and also has the advantages of light self weight, high bearing capacity and large span.
Owner:广西东兴市富佳五金皮具有限公司
Sound signal generating method, sound signal generating device, and computer program
ActiveCN101796575ADestruction will notAmplitude accentuatedSpeech synthesisRepeating waveformsSurface roughness
A sound signal generating method, a sound signal generating device, and a computer program where high quality sound in which sound quality deterioration such as a noise sensitivity or a surface roughness sensitivity is suppressed is generated by processing the original sound signal to generate the processed sound signal are provided. The processed sound signal is generated by separating the original sound signal in the pitch unit of a waveform to generate a plurality of unit waveform signals, generating a repetition waveform signal for repeating the waveform of the generated unit waveform signals by the number of predetermined times for each of the unit waveform signals, and moving each of the repetition waveform signals in the order in which the original sound signal is formed in the pitch unit and superposing on one another.
Owner:FUJITSU LTD
Drive system of synchronized electric motor
InactiveCN103081344AMotor control for very low speedsVector control systemsRepeating waveformsElectricity
Provided is a drive system of a synchronized electric motor that is capable of driving at speeds near zero. An electricity supply mode determination apparatus (9) detects either an electricity non-supply phase terminal potential of a three-phase synchronized electric motor (4) or a stator coil connection point potential (neutral point potential) of the three-phase synchronized transmitter, and sequentially switches among six electricity supply modes on the basis of the detected value of the potential. In order to supply repeating waveforms of three types of voltage to the synchronized electric motor, said three types of voltage being a positive polarity pulse voltage that causes the synchronized electric motor to generate a positive rotation torque, an inverse pulse voltage that causes the synchronized electric motor to generate an inverse rotation torque, and a zero voltage, as line voltage waveforms of electricity supply phase in each of the six electricity supply modes, a voltage instruction compensator apparatus (8) uses a degree of compensation deltaV to compensate for a voltage instruction that is applied to the synchronized electric motor. The electricity supply phase line voltage is applied to the synchronized electric motor.
Owner:HITACHI AUTOMOTIVE SYST LTD +1
Repetitive waveform generator recirculating delay line
InactiveUS7092596B2Wave based measurement systemsCoupling light guidesRepeating waveformsEngineering
Owner:RAYTHEON CO
Systems and methods for performing synthetic aperture radar imaging using superchirps
Synthetic aperture radar (SAR) imaging systems that transmit repeated waveforms based upon pseudonoise sequences to generate SAR imaging data in accordance with various embodiments of the invention are disclosed. A synthetic aperture radar in accordance with one embodiment of the invention includes: a transmitter configured to transmit superchirps, where the superchirp is generated by convolving a kernel with a pseudonoise modulated impulse sequence having a flat power spectrum; a receiver configured to receive backscatters of transmitted superchirps and digitize the received backscatters; and signal processing circuitry configured to perform matched filtering on digitized backscatters.
Owner:PLANET LABS PBC
Fabricated Prestressed Honeycomb Ribbed Web Steel Beam
ActiveCN103255877BImprove mechanical performanceImprove stabilityGirdersJoistsRepeating waveformsWave shape
Owner:BEIJING UNIV OF TECH +1
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