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46results about How to "Frequency efficiency" patented technology
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Femtocell Channel Assignment and Power Control for Improved Femtocell Coverage and Efficient Cell Search
ActiveUS20090291690A1Increase efficiency and coverageEfficient managementPower managementNetwork topologiesCommunications systemFrequency spectrum
A method and a communication system including femtocells within a macrocell efficiently manage interference between the different femtocells, and between each femtocell and a macrocell. An efficient frequency assignment scheme for the femtocells minimizes interference between a femtocell and a macrocell and among different femtocells using a spectrum-sensing technique carried out by the femtocells. The frequency assignment scheme selects a suitable channel from a set of candidate channels and ensures that the femtocell has an acceptable coverage area even when it is close to the macrocell base station (BS). The frequency assignment scheme favors a co-channel implementation to take advantage of the hand-off and cell search characteristics of the co-channel implementation. In one embodiment, a joint power control and frequency band assignment technique is used, which partitions the coverage area of the macrocell into an inner region, a power control region, and an outer region. Depending on a femtocell's location, it is assigned a certain power level and a frequency band. Power control may be used within the power-control region while, in the other regions, a fixed transmission power may be used.
Owner:NTT DOCOMO INC
Remote identification of container contents by means of multiple radio frequency identification systems
ActiveUS20050134433A1Great range and capacitySignificant store powerElectric signal transmission systemsDigital data processing detailsRadio frequencyRadio-frequency identification
A method and apparatus for performing the remote identification of the contents of containers by means of multiple radio frequency identification systems.
Owner:QUAKE GLOBAL
Remote identification of container contents by means of multiple radio frequency identification systems
ActiveUS7256682B2Great range and capacitySolve the power is smallElectric signal transmission systemsDigital data processing detailsRadio frequencyRadio-frequency identification
A method and apparatus for performing the remote identification of the contents of containers by means of multiple radio frequency identification systems.
Owner:QUAKE GLOBAL
Compact efficient and robust ultraviolet solid-state laser sources based on nonlinear frequency conversion in periodically poled materials
InactiveUS7570676B2Low costHigh peak powerOptical devices for laserNon-linear opticsNonlinear crystalsLight source
A compact and efficient ultraviolet laser source based on a optically-pumped solid-state or fiber laser that produces near-infrared output light suitable for nonlinear frequency conversion. The infrared laser output is frequency tripled or quadrupled to produce light in the ultraviolet wavelength range (200 nm to 400 nm). The novel technology is the use of highly efficient periodically poled nonlinear crystals, such as stoichiometric and MgO-doped lithium tantalate and lithium niobate. As opposed to conventional frequency-converted UV laser sources, which have high power consumption, high cost, and low efficiency, the laser sources of this invention utilize high efficiency nonlinear conversion provided by periodically poled materials and allow lower-cost architectures without additional focusing lenses, high power pump diodes, etc.
Owner:OOO SPECTRALUS
Compact efficient and robust ultraviolet
InactiveUS20070263693A1Low costHigh peak powerOptical devices for laserNon-linear opticsUltravioletLaser source
A compact and efficient ultraviolet laser source based on a optically-pumped solid-state or fiber laser that produces near-infrared output light suitable for nonlinear frequency conversion. The infrared laser output is frequency tripled or quadrupled to produce light in the ultraviolet wavelength range (200 nm to 400 nm). The novel technology is the use of highly efficient periodically poled nonlinear crystals, such as stoichiometric and MgO-doped lithium tantalate and lithium niobate. As opposed to conventional frequency-converted UV laser sources, which have high power consumption, high cost, and low efficiency, the laser sources of this invention utilize high efficiency nonlinear conversion provided by periodically poled materials and allow lower-cost architectures without additional focusing lenses, high power pump diodes, etc.
Owner:OOO SPECTRALUS
Ultra-high-frequency notch filter
InactiveUS20050059998A1Easy constructionMinimize parts countMultiple-port networksElectrotherapyCapacitanceEngineering
An ultra-high-frequency notch filter (100) comprises a capacitor (102) defining a conductive trace (106) on its body (103) and extending between its terminals (104). The trace has an inductance that forms a parallel LC circuit with the capacitance of the capacitor. When mounted on a printed circuit board (120) to connect two segments of a signal line (124), the notch filter and a ground plane (122) of the PCB form a virtual conductive loop having an inductance and a capacitance whose product is the center frequency of the notch of the notch filter. The center ferquency is tuned by varying the width of the trace.
Owner:AVAYA INC
Antenna and methods of use for an implantable nerve stimulator
ActiveUS20160199658A1Efficient communicationSolve insufficient bandwidthLoop antennas with ferromagnetic coreElectrotherapyTransceiverFirst pathway
A pulse generator that includes a communications module is disclosed herein. The communication module includes a transceiver and an antenna circuit. The antenna circuit includes a first pathway having a capacitor and a second, parallel pathway including a capacitor, and a resistor, and a radiating element arranged in series. The antenna circuit is tuned to have a resonant frequency corresponding to a desired transmission frequency and a bandwidth corresponding to shifts in the resonant frequency arising from the implantation of the antenna circuit in a patient's body.
Owner:AXONICS
Channel allocation method and apparatus for wireless communication networks
InactiveUS20100091731A1Frequency efficiencyEffective distributionNetwork topologiesWireless commuication servicesTelecommunicationsWireless communication systems
A channel allocation method for use in a wireless communication environment, where Wireless Local Area Networks (WLANs) and Wireless Personal Area Networks (WPANs) coexist, includes collecting, at an access point, information on channels used by the WLANs and WPANs, determining available WLAN channels and available WPAN channels based on the channel information, allocating one of the available WLAN channels and one of the available WPAN channels to the access point, and informing the WLANs and WPANs of the allocated WLAN and WPAN channels.
Owner:SAMSUNG ELECTRONICS CO LTD
Archery bow accessories
B / D archery bow accessories which have an elastomeric vibration dampening component mounted on an elongated, rigid support. The elastomeric component has a set of integral vibration dampening elements such as ribs. The vibration dampening elements have irregular profile configurations which make these elements capable of dampening with high efficiency the sets of vibrational frequencies generated: (a) when an arrow is shot, and (b) during and after the ensuing lock-up. Vibration dampening efficiency may be promoted by making the elastomeric component from a material of the most optimal hardness that is practical and by employing end pieces at opposite ends of the elastomeric component.
Owner:SIMS STEVEN C +1
Regional Clock Gating and Dithering
ActiveUS20130191677A1Effective frequency of clock signalSave powerEnergy efficient ICTPower reduction by control/clock signalIdle timeClock tree
A system and method for dithering a clock signal during idle times is disclosed. An integrated circuit (IC) includes a number of functional units and a clock tree. The clock tree includes a root level clock-gating circuit, a number of regional clock-gating circuits, and a number of leaf level clock-gating circuits. The root level clock-gating circuit is coupled to distribute an operating clock signal to the regional clock-gating circuits, while the regional clock-gating circuits are each configured to distribute the operating clock signal to correspondingly coupled ones of the leaf level clock-gating circuits. The IC may further include a control unit configured to monitor activity levels and indications from each of the functional units. The control unit may cause the root clock-gating circuit to dither the clock signal if the IC is idle, wherein dithering includes reducing the duty cycle and the effective frequency of the operating clock signal.
Owner:APPLE INC
Piezoelectric substrate for a saw device
ActiveUS20080169724A1High expansion coefficientReduce contractionImpedence networksPiezoelectric/electrostriction/magnetostriction machinesThermal coefficientNanotechnology
The present invention provides a composite structure having a supporting substrate between a piezoelectric substrate and a compensation layer. The materials used to form the piezoelectric substrate and the compensation layer in isolation, have higher thermal coefficients of expansion (TCE) relative to the TCE of the materials forming the supporting substrate. Once the composite structure is created, the piezoelectric substrate and compensation layer tend to expand and contract in a similar manner as temperature changes. The expansion and contraction forces applied to the supporting substrate by the piezoelectric substrate due to temperature changes are substantially countered by similar opposing forces applied by the compensation layer, resulting in the opposing forces substantially counteracting one another. Due to the counteraction, the composite structure resists bending or warping, reducing expansion and contraction and increasing stress of the piezoelectric substrate, and thus reducing the effective TCE and TCF of the piezoelectric substrate.
Owner:QORVO US INC
Piezoelectric substrate for a saw device
ActiveUS7408286B1High expansion coefficientReduce expansionPiezoelectric/electrostriction/magnetostriction machinesImpedence networksThermal coefficientNanotechnology
Owner:QORVO US INC
Wireless communication system, transmitter and receiver
InactiveUS20110116566A1Improve frequency selectivityError rate of signalModulated-carrier systemsDiversity/multi-antenna systemsTime domainCommunications system
According to the present invention, a transmitter includes: multiple antennas 15-1, 15-2; a DFT unit 04 configured to transform a time domain signal into a frequency domain signal; a cluster mapping unit 05 configured to divide the frequency domain signal into clusters and to assign the clusters to frequencies on the basis of cluster assignment information; an IDFT unit 06 configured to transform a mapped frequency domain signal into a time domain signal; and cyclic delay setting units 11-1, 11-2 configured to set, for the respective multiple antennas, a cyclic delay amount to the IDFT-transformed time domain signal.
Owner:SHARP KK
Femtocell channel assignment and power control for improved femtocell coverage and efficient cell search
ActiveUS8280387B2Increase efficiency and coverageEfficient managementPower managementNetwork topologiesFrequency spectrumCommunications system
A method and a communication system including femtocells within a macrocell efficiently manage interference between the different femtocells, and between each femtocell and a macrocell. An efficient frequency assignment scheme for the femtocells minimizes interference between a femtocell and a macrocell and among different femtocells using a spectrum-sensing technique carried out by the femtocells. The frequency assignment scheme selects a suitable channel from a set of candidate channels and ensures that the femtocell has an acceptable coverage area even when it is close to the macrocell base station (BS). The frequency assignment scheme favors a co-channel implementation to take advantage of the hand-off and cell search characteristics of the co-channel implementation. In one embodiment, a joint power control and frequency band assignment technique is used, which partitions the coverage area of the macrocell into an inner region, a power control region, and an outer region. Depending on a femtocell's location, it is assigned a certain power level and a frequency band. Power control may be used within the power-control region while, in the other regions, a fixed transmission power may be used.
Owner:NTT DOCOMO INC
High speed filter
ActiveUS7028070B2Frequency efficiencyReduce the burden onComputing operations for integral formationTransversal filtersBinary multiplierAnalog signal
An electronic filter operates as a correlator that provides a discrete approximation of an analog signal. The analog to digital conversion is integrated directly approximation calculation. An array of sample and hold circuits or single bit comparators provide outputs to a series of multipliers, the other input of which is a coefficient value of a Fourier series approximation of the desired frequency response. Each of the sample and hold circuits samples sequentially in time and holds its sample until the next cycle. Thus the sample point rotates in time through the array and each new sample is multiplied by a different coefficient. The output of the multipliers is summed for evaluation.
Owner:ESS TECHNOLOGY
System for remotely monitoring a premise
InactiveUS20060164234A1High implementation costEasy to installSubstation equipmentAlarmsTelecommunications linkVoice communication
A system and method for monitoring a premise in case of an emergency and enabling 2-way voice communications with an individual at every possible location within the monitored premises. The system utilizes a radio frequency 2-way wireless communication link from a centrally located Base Alarm Control Unit on the premise to plurality of Remote Alarm Control Units situated throughout the premise. Remote Alarm Control Units relay the information received from the wireless remote transmitters to the Base Alarm Control Unit thereby increasing the effective useful range of the wireless communication link. The same also establishes a 2-way voice connection between the Central Station operator and the individual who may be located at any possible location within the premise, thereby providing a much more effective handling of the emergency or alarm situation.
Owner:ACAR MUSTAFA
Rectifier circuit
InactiveUS20120112719A1High frequencyReduce componentsEfficient power electronics conversionDc-dc conversionElectricityPower flow
A rectifier circuit includes: a switching circuit having an input end, an output terminal and a control end, wherein the input end of the switching circuit receives an input voltage; a control circuit electrically connected to the control end of the switching circuit, wherein, when a load current is smaller than a reference current, the rectifier circuit is situated at a light-load state and the control circuit reduces a switching frequency of the switching circuit; and a filtering circuit which is electrically connected between the output end of the switching circuit and an output terminal of the rectifier circuit, and includes at least one inductive component of which a current is formed by superposition of the load current and a ripple current, wherein, when the load current is smaller than the reference current, an inductance of the inductive component increases with the decrease of the load current.
Owner:INVENTEC CORP
Frequency search method for a mobile station and a mobile station therewith
InactiveUS20020177441A1Efficient searchFrequency efficiencyEnergy efficient ICTPower managementTelecommunicationsMobile communication systems
A smaller number of frequencies are dynamically defined, from which a frequency to be used is first searched, failing which, all the frequencies available to a particular mobile communication system are searched, thereby frequency search is efficiently performed with a reduced power consumption.
Owner:GOOGLE LLC
Regional clock gating and dithering
ActiveUS8769332B2Save powerEffective frequency of clock signalEnergy efficient ICTPower reduction by control/clock signalClock treeEngineering
A system and method for dithering a clock signal during idle times is disclosed. An integrated circuit (IC) includes a number of functional units and a clock tree. The clock tree includes a root level clock-gating circuit, a number of regional clock-gating circuits, and a number of leaf level clock-gating circuits. The root level clock-gating circuit is coupled to distribute an operating clock signal to the regional clock-gating circuits, while the regional clock-gating circuits are each configured to distribute the operating clock signal to correspondingly coupled ones of the leaf level clock-gating circuits. The IC may further include a control unit configured to monitor activity levels and indications from each of the functional units. The control unit may cause the root clock-gating circuit to dither the clock signal if the IC is idle, wherein dithering includes reducing the duty cycle and the effective frequency of the operating clock signal.
Owner:APPLE INC
Archery bow accessories
B / D archery bow accessories which have an elastomeric vibration dampening component mounted on an elongated, rigid support. The elastomeric component has a set of integral vibration dampening elements such as ribs. The vibration dampening elements have irregular profile configurations which make these elements capable of dampening with high efficiency the sets of vibrational frequencies generated: (a) when an arrow is shot, and (b) during and after the ensuing lock-up. Vibration dampening efficiency may be promoted by making the elastomeric component from a material of the most optimal hardness that is practical and by employing end pieces at opposite ends of the elastomeric component.
Owner:SIMS STEVEN C +1
Compact, Efficient and Robust Ultraviolet Solid-State Laser Sources Based on Nonlinear Frequency Conversion in Periodically Poled Materials
InactiveUS20090290605A1Low costHigh peak powerSemiconductor lasersOptical devices for laserNonlinear crystalsLight source
A compact and efficient ultraviolet laser source based on a optically-pumped solid-state or fiber laser that produces near-infrared output light suitable for nonlinear frequency conversion. The infrared laser output is frequency tripled or quadrupled to produce light in the ultraviolet wavelength range (200 nm to 400 nm). The novel technology is the use of highly efficient periodically poled nonlinear crystals, such as stoichiometric and MgO-doped lithium tantalate and lithium niobate. As opposed to conventional frequency-converted UV laser sources, which have high power consumption, high cost, and low efficiency, the laser sources of this invention utilize high efficiency nonlinear conversion provided by periodically poled materials and allow lower-cost architectures without additional focusing lenses, high power pump diodes, etc.
Owner:OOO SPECTRALUS
Spatial reuse in WLAN multi-ap network
ActiveUS20190288767A1Easy to useImprove throughputPower managementSite diversityRadio coverageTransmitted power
Systems and methods of WLAN communication including efficient spatial reuse mechanisms for relay transmissions between a repeater network and non-AP STAs in OFDMA. The non-AP STAs are grouped based on their connectivity with the individual repeaters and the radio coverage regions of the repeaters. Each group is either a non-overlapping group with the constituent non-AP STAs located in a non-overlapping coverage region of a particular repeater, or an overlapping group with the constituent non-AP STAs located in an overlapping coverage region of two or more repeaters. Based on the grouping, certain RUs (or subchannels) are reused for multiple groups without causing inter-group interference, thereby expanding the bandwidths used in the relay operations. RU allocation based on grouping can be used in combination with transmit power adjustment to achieve efficient spatial reuse in OFDMA.
Owner:MEDIATEK SINGAPORE PTE LTD SINGAPORE
Sending radio station, receiving radio station, radio communication system, and radio communication method
InactiveUS7457230B2Reduce capacityFrequency efficiencyTime-division multiplexFrequency-division multiplexCommunications systemCarrier signal
A method, device and system for arranging symbols to be sent in the frequency axis and for sending signals to a radio terminal inside an area using one or a plurality of carrier frequency bands, in a radio communication system with a hierarchical cell structure. The method includes detecting by a device at least one carrier frequency band signal pertaining to a transmission system other than that of its own station. A sending-symbol synchronization is detected based on at least one received signal upon detecting the carrier frequency band signal pertaining to the transmission system other than that of its own station. The signal is sent based on the derived symbol sending timing.
Owner:NTT DOCOMO INC
Carrier sensing method and RFID transceiver device using the same
InactiveUS20060229041A1Accurate carrier sensingFrequency efficiencyRadio transmissionSensing record carriersTransceiverSignal processing circuits
An RFID transceiver device is proposed capable of carrier sensing even when the difference with respect to the carrier frequency employed by the other system is close to “0”. The device includes a control and signal processing circuit; a local oscillation circuit that generates a local oscillation signal of frequency that is specified by said control and signal processing circuit; and a reception circuit that demodulates the reception signal using the local oscillation signal frequency that is output from said local oscillation circuit; wherein the control and signal processing circuit performs control so as to output, to the local oscillation circuit, a local oscillation signal of a reference frequency in the case of ordinary communication, and output, to the local oscillation circuit, a local oscillation signal shifted by a prescribed frequency with respect to said reference frequency in the case of carrier sensing, as a local oscillation signal for demodulating the reception signal in the reception circuit.
Owner:FUJITSU LTD
Dual-notch antenna and antenna array thereof
ActiveUS20190074599A1Improving Impedance MatchingAvoid signal reflectionAntenna adaptation in movable bodiesIndividually energised antenna arraysEngineeringAntenna array
A dual-notch antenna includes a radiation member and two microstrip lines. The radiation member is formed in a rectangular shape, with two first lateral sides disposed in opposite, and two second lateral sides disposed on two ends of the two first sides, respectively. The middle section of each first lateral side is concavely provided with a notch. Each notch has a feeding side and two cove sides, wherein the feeding side is disposed in parallel to the first lateral sides. The two cove sides are connected with two ends of the feeding side. Each microstrip line has one end thereof electrically connected with the feeding side of the corresponding notch, respectively.
Owner:CUBTEK INC
High speed filter
InactiveUS20060123075A1Frequency efficiencyReduce the burden onComputing operations for integral formationTransversal filtersBinary multiplierAnalog signal
An electronic filter operates as a correlator that provides a discrete approximation of an analog signal. The analog to digital conversion is integrated directly approximation calculation. An array of sample and hold circuits or single bit comparators provide outputs to a series of multipliers, the other input of which is a coefficient value of a Fourier series approximation of the desired frequency response. Each of the sample and hold circuits samples sequentially in time and holds its sample until the next cycle. Thus the sample point rotates in time through the array and each new sample is multiplied by a different coefficient. The output of the multipliers is summed for evaluation.
Owner:ESS TECHNOLOGY
Radio frequency doubler
ActiveUS7245164B2Efficient extractionEasy extractionModulation transference balanced arrangementsComputations using contact-making devicesDifferential signalingEngineering
When a signal of a double frequency is generated from the original signal, conventionally a 90-degree phase-shift circuit is necessary to suppress an output of a DC component and efficiently obtain a double wave. According to the present invention, an equal RF signal is inputted to input terminals and an output is matched with a frequency as high as that of the original frequency in a Gillbert cell double-balanced mixer, so that a doubled output is obtained with no DC offset. According to the circuit configuration of the present invention, it is possible to provide a circuit readily performing integration and to efficiently output only a double frequency merely by inputting a simple differential signal without the need for the original signal which has been phase controlled. Further, a DC short circuit in the resonance circuit makes it possible to eliminate a DC offset voltage in an output.
Owner:PANNOVA SEMIC
System for remotely monitoring a premise
InactiveUS7642909B2Frequency efficiencyExpand the effective rangeInterconnection arrangementsSubstation speech amplifiersTelecommunications linkVoice communication
A system and method for monitoring a premise in case of an emergency and enabling 2-way voice communications with an individual at every possible location within the monitored premises. The system utilizes a radio frequency 2-way wireless communication link from a centrally located Base Alarm Control Unit on the premise to plurality of Remote Alarm Control Units situated throughout the premise. Remote Alarm Control Units relay the information received from the wireless remote transmitters to the Base Alarm Control Unit thereby increasing the effective useful range of the wireless communication link. The same also establishes a 2-way voice connection between the Central Station operator and the individual who may be located at any possible location within the premise, thereby providing a much more effective handling of the emergency or alarm situation.
Owner:ACAR MUSTAFA
Pulsed uv-light source
ActiveUS20140091240A1Low costSimple and inexpensive frequency doubling set-upRadiation pyrometryExcitation process/apparatusOptical measurementsNonlinear crystals
The disclosure relates to a tunable optical light source spanning the UV-range and possible also the visible and near-IR wavelengths. The tunable optical light source includes an input light source, a focusing element, a non-linear crystal arranged to convert the frequency of at least part of the output spectrum of the super continuum source, and a holding unit for the non-linear crystal. The input light source is a super continuum light source with a spectral bandwidth of at least about 300 nm and the holding unit is adjustable for changing the frequency converted output wavelength of the non-linear crystal wfc such that the lowest obtainable output wavelength wUV of said tunable light source is ultraviolet. The disclosure further relates to an illumination source and an optical measurement system.
Owner:NKT PHOTONICS
Decimating down converter and related methods
A system of downconverting an intermediate frequency (IF) phase or frequency modulated signal to a digital baseband includes an N bit shift register circuit that receives a binary input as a 1-bit input sample data stream of an IF signal. A decimation circuit includes a memory and receives data from the N bit shift register circuit and stores N 1-bit binary samples as address bits and performs decimation, downconversion and filtering by accessing memory values at a predetermined rate.
Owner:HARRIS GLOBAL COMM INC
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