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63results about How to "Improve reception accuracy" patented technology
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OFDM radio communications system, transmitter and receiver
InactiveUS20070223364A1Enhancing data reception accuracyImprove Channel Estimation AccuracyModulated-carrier systemsTransmission path divisionFrequency bandPilot signal
Each of a general chunk to which pilot signals are allocated at a general density, and a high-density chunk to which pilot signals are allocated at a higher density than the density of the general chunk, is transmitted in a frequency band common to OFDM transmitters. Each of the OFDM transmitters allocates the high-density chunk to any one of OFDM receivers, which notifies poor receiving quality.
Owner:FUJITSU TOSHIBA MOBILE COMM LTD
Amplitude change time activated phase locked controller in a selective call receiver
InactiveUS6456831B1Improve accuracyImprove reception accuracySynchronisation arrangementPulse automatic controlSelective callingRadio reception
A radio receiver with improved accuracy of phase-locked loop is disclosed. In addition to a detector for detecting a detected signal from a received radio signal, the receiver includes a monitor for monitoring an amplitude change of the detected signal to detect timing where the amplitude change occurs over a predetermined range. The phase-locked control of the timing clock signal with respect to the detected signal is performed only when the timing is detected by the monitor.
Owner:NEC CORP
Signal processing method and device
InactiveCN104853339ARandomize signal interferenceImprove anti-interference abilityError preventionConnection managementInterference resistanceResource utilization
A signal processing method and device. The method comprises: when there is data to be sent, determining, by a user equipment, a generation manner of a pseudo-random sequence according to a type of the data to be sent; when the data to be sent is device-to-device communication data, conducting, by the user equipment, assignment on an initial value of the generated pseudo-random sequence according to a pre-defined rule, and generating the pseudo-random sequence according to the initial value; generating one or more of a scrambling sequence, a cyclic shift sequence or a pilot sequence according to the pseudo-random sequence; and processing the data to be sent using one or more of the scrambling sequence, the cyclic shift sequence or the pilot sequence. The embodiments of the present invention enable a UE to generate a pseudo-random sequence by using a pre-defined initial value type as an initialization parameter, to conduct scrambling, cyclic shift, pilot insertion and other processing on a signal to be transmitted, thereby playing roles of randomizing signal interference, enhancing the anti-interference capability, and improving the signal receiving accuracy rate and the resource utilization rate.
Owner:ZTE CORP
MIMO OFDM timing synchronization device
InactiveCN104767706AReduce complexityReduce the difficulty of implementationBaseband system detailsMulti-frequency code systemsMoving averageSelf correlation
The invention discloses a timing synchronization hardware implementation method applicable to an OFDM system. An IEEE 802.11a / g / n protocol is compatible, cyclic shift of the IEEE 802.11n protocol is correspondingly processed, and synchronous data are more accurate. A robust frame detecting algorithm is designed, whether data come truly is judged by means of cluster peak detection and instantaneous peak detection, judgment accuracy is improved, two self-correlation modules and a moving average module are used for coarse frequency offset estimation and fine frequency offset estimation respectively, final frequency offset is obtained comprehensively according to the relation between coarse frequency offset estimation and fine frequency offset estimation, frequency offset estimation accuracy is improved, an improved CORDIC algorithm is adopted for frequency offset correction, and operating efficiency is improved.
Owner:INST OF DONGGUAN SUN YAT SEN UNIV +1
Antenna Diversity For Wireless Tracking System And Method
InactiveUS20110025464A1Improve reception accuracyIncrease signal strengthPosition fixationSubscribers indirect connectionEngineeringLength wave
The present invention provides a solution to determine a real-time location of an object in an indoor facility utilizing the spatial and angular antenna diversity on a sensor. Specifically, the spatial diversity is achieved by placing a second antenna a predetermined distance (which is greater than one-half of the wavelength) away from the first antenna. The angular diversity is obtained by placing the second antenna at ninety degrees (perpendicular) angle of the first antenna.
Owner:AWAREPOINT CORPORATION
Wireless communication apparatus and phase-variation correction method
InactiveUS20060293087A1Improve reception accuracyUnnecessary additionSubstation equipmentRadio transmissionRadio receptionEngineering
Disclosed is a wireless communication apparatus having an array antenna constituted by a plurality of antennas, radio receiving circuits, which are provided for respective ones of the antennas, for amplifying respective ones of antenna receive signals and applying a frequency conversion to the baseband signals, and a demodulator for demodulating receive data from the baseband signals. A narrow-band-signal extracting unit extracts two narrow-band signals, which have the maximum frequency spacing between them, from the baseband signals of each of the antennas, an estimating unit estimates phase variation in each radio receiving circuit using the two narrow-band signals of each antenna, and a phase-variation correcting unit corrects for phase variation in each radio receiving circuit. The estimating unit estimates the direction of signal arrival using narrow-band signals of at least two antennas, a beam former applies receive beam-forming processing to each corrected signal based upon the direction of signal arrival, and a receive-signal processor demodulates receive data from the receive signal that has undergone beam-forming processing.
Owner:FUJITSU LTD
OFDM radio communications system
InactiveUS20070189149A1Small amount of calculationEasy to controlTransmission control/equlisationSpatial transmit diversityEngineeringRadio communications
A transmitter forms each subcarrier group of only frequency locations of subcarriers to which at least one pilot signal is allocated, and conducts transmission by allocating a macro-diversity signal into the subcarrier group and allocating a non-macro-diversity signal to other frequencies (outside the subcarrier group). As for the macro-diversity signal, a receiver conducts channel estimation on the basis of the pilot signal in the same subcarrier group as the macro-diversity signal. As for the non-macro-diversity signal outside the subcarrier group, the receiver conducts channel estimation on the basis of the pilot signal, and results of channel estimations of the macro-diversity signal and other non-macro-diversity signals.
Owner:FUJITSU TOSHIBA MOBILE COMM LTD
ofdm receiving synchronization device
InactiveCN102271110AReduce complexityIncrease power consumptionMulti-frequency code systemsLatency (engineering)Computer module
The embodiment of the present invention discloses an OFDM receiving synchronization device, including a frame synchronization module, a carrier frequency synchronization module, and a symbol synchronization module, and the frame synchronization module includes a first delay autocorrelation unit, a 64-point averaging unit, and a complex modulus unit And a frame detection unit; the frequency synchronization module includes a second delay autocorrelation unit, a 16-point averaging unit, a frequency offset estimation unit, and a frequency offset correction unit, and the symbol synchronization module includes a cross-correlation unit. By adopting the invention, while improving the receiving accuracy, the complexity of the algorithm and the difficulty of hardware realization are reduced, and the low power consumption and low delay of the OFDM receiving end are realized.
Owner:徐永键
Received signal strength measurement circuit, received signal strength detection circuit and wireless receiver
InactiveUS7415256B2Stably measure strengthImprove reception accuracyAmplifier modifications to reduce temperature/voltage variationAmplifier combinationsVoltage amplitudeCurrent voltage
The RSSI circuit of the present invention includes: an IF amplifier section, which includes multiple stages of serially connected differential amplifiers for amplifying, with use of a current source IA provided as a power source for amplification, an IF signal corresponding to a received signal; an RSSI amplifier section for converting into current a voltage amplitude of an absolute value signal outputted from the differential amplifiers of the IF amplifier section, using a current source IB provided as a power source for conversion, and adding and outputting the converted current; and a current voltage conversion circuit for converting into voltage the output current from the RSSI amplifier section, and outputting the converted voltage as a measurement voltage value. The RSSI amplifier section is set so that a current value of the RSSI amplifier section is inversely proportional to absolute temperature. With the configuration, it is possible to realize an RSSI circuit, a received signal strength detection circuit and a wireless receiver, which are able to stabilize a strength measurement of a received signal relative to a change in temperature and to increase communication characteristics.
Owner:SHARP KK
Receiver
InactiveUS6968169B2Enhancing received signal path detection accuracyImprove detection accuracySpatial transmit diversityAntenna arraysEngineeringElectrical and Electronics engineering
A receiver that uses multiple antennas to receive signals arriving over multiple paths and is configured for enhanced received signal path detection accuracy and improved reception quality includes a receive weight generating circuit that generates receive weights for every antenna based on signals received from the antennas, a summing circuit that calculates sums of results obtained by multiplying the signals from the antennas and the receive weights of the individual antennas generated by the receive weight generating circuit and path detection circuit that detects the paths of the received signals based on the sums calculated by the summing circuit.
Owner:KOKUSA ELECTRIC CO LTD
Method, apparatus and system for data transmission
InactiveCN106559184ASolve the problem that it cannot be received correctly by UEImprove reception accuracyError prevention/detection by using return channelRe sequencingComputer hardware
The invention provides a method, apparatus and system for data transmission. The method comprises: receiving the re-sequencing self-ignoring function responding message reported from UE; according to the re-sequencing self-ignoring function responding message, determining whether the UE has the re-sequencing self-ignoring function or not; if the determining result is yes and if it is required to abort the re-sequencing self-ignoring function, then configuring the abortion instruction for the re-sequencing self-ignoring function of the UE; and transmitting the abortion instruction for the re-sequencing self-ignoring function to the UE. The method solves the problem that re-transmission data cannot be correctly received by the UE, therefore, increasing the accuracy to receive re-transmission data and preventing the PDCP data from being wasted in re-transmission.
Owner:ZTE CORP
Electronic apparatus and timepiece
ActiveCN101154765AImprove reception accuracyLoop antennas with ferromagnetic coreAntenna supports/mountingsMagnetic tension forceElectromotive force
In an antenna device of a wristwatch, a pair of external magnetic members each attached to a respective one of both ends of a magnetic core effectively collects the magnetic flux of a standard time and frequency signal. The collected magnetic flux passes through the core around which a coil is wound, thereby inducing an electromotive force and hence improving the reception accuracy of the signal. The pair of external magnetic members screens out undesirable external magnetism which would otherwise influence motors that drive a hand shaft and hands, thereby achieving accurate hand driving and improving the high watch accuracy.
Owner:CASIO COMPUTER CO LTD
Data transmission method based on window mechanism action
ActiveCN1815942AImprove sending efficiencyImprove reception accuracyError prevention/detection by using return channelTime delaysData transmission
The method includes (1) setting up threshold value of engaged sending window, and monitoring size of the sending window and data to be sent in real time; (2) determining whether size of the sending window is less than threshold value of engaged sending window; if no, selecting unconfirmed data from size of the sending window to send, ending; if yes, then executing step (3); (3) determining whether size of the sending window is smaller than size of data to be sent; if no, selecting unconfirmed data from data to be sent to carrying out sending; if, yes, returning back to (1). The invention solves waste of bandwidth under operation of window mechanism. When data is full in the sending window or data are less, the method carries out sending selectively forwardly in order to raise sending efficiency at sending end in data transmission procedure. Moreover, using retransmission increases correction rate of reception at receiving end so as to lower time delay from end to end effectively.
Owner:HUAWEI TECH CO LTD
Method and apparatus for transferring signal data
ActiveUS20090177295A1Improve reception accuracyIncrease capacityDC motor speed/torque controlPosition fixationContinuous signalData transmission
The invention relates to a method and device for transferring signal data from a sender to one or more receivers. The invention includes receiving a quantity as a function of time, arranging the quantity into a first polynomial to obtain values for polynomial coefficients of a first continuous signal, and transferring the values of the polynomial coefficients of the first continuous signal via a first data transfer link to one or more receivers.
Owner:ABB (SCHWEIZ) AG
Method for receiving optical orthogonal frequency-division multiplexing signal and receiver thereof
ActiveUS8107817B2Improve bandwidth usageTiming offset and the chromatic dispersion constant can be effectively estimatedElectric signal transmission systemsWavelength-division multiplex systemsElectricityFourier transform on finite groups
Owner:IND TECH RES INST
Receiver IQ imbalance compensation method and device
ActiveCN112994712AAccepts little impact on performanceNo increase in consumptionTransmissionTerminal equipmentControl theory
The invention belongs to the field of terminal equipment, and provides a receiver IQ imbalance compensation method and device. The method comprises the steps: calculating a pre-calibration parameter and carrying out the pre-calibration when a receiver is subjected to factory calibration, so as to compensate the initial IQ imbalance; and when the receiver is in a use state, performing fine calibration based on the pre-calibration parameter and the fine calibration parameter to compensate the current IQ imbalance. The IQ imbalance compensation of the receiver is carried out in a mode of combining pre-calibration compensation and fine calibration compensation, the accuracy of compensation is ensured under the condition that the receiving precision is improved, and resources are saved at the same time.
Owner:上海擎昆信息科技有限公司
Infrared remote control signal receiving method, receiving system, receiving equipment and storage medium
ActiveCN111402570AGuaranteed smooth receptionNot affected by decoding progressNon-electrical signal transmission systemsPulse durationPulse number
The embodiment of the application provides an infrared remote control signal receiving method, an infrared remote control signal receiving system, infrared remote control signal receiving equipment and a storage medium. The method comprises the steps: receiving an infrared pulse through a first thread, and sequentially storing the pulse duration data of the infrared pulse into a first data sequence; acquiring one-bit pulse duration data stored in the first data sequence through a second thread; judging whether the time interval between the pulse duration data and the previous pulse duration data is overtime or not; if not, storing the pulse duration data in a second data sequence, and performing infrared remote control decoding on the pulse duration data stored in the second data sequence;and if the second data sequence is overtime, emptying the second data sequence, and continuing to acquire next pulse duration data stored in the first data sequence. According to the embodiment of the application, when the infrared remote control signal is received, the loss of new pulse data due to untimely receiving caused by overlong decoding processing time can be prevented, and the accuracyof receiving and decoding the infrared remote control signal is improved.
Owner:GUANGZHOU CHUANGZHI TECH CO LTD
Road side unit and free flow electronic charging system
ActiveCN102903155AImprove reception accuracyGuaranteed signal diversityTicket-issuing apparatusCarrier signalEngineering
The invention discloses a road side unit and a free flow electronic charging system. The road side unit is provided with at least two receivers, and carriers of the at least two receivers in multiple receivers are different. The free flow electronic charging system also comprises a multi-lane system controller and single-lane controllers which are distributed on different lanes besides the road side units, wherein multiple road side units are distributed on different lanes, the road side unit of each lane is respectively connected with the single-lane controller of the lane, and each single-lane controller is connected with the multi-lane system controller. By utilizing the road side unit and the free flow electronic charging system which are disclosed by the invention, the receiving effect of the free flow electronic charging system can be improved, a communication switching problem when a vehicle changes the lane can be effectively solved, and the normal operation of communication service can be guaranteed.
Owner:SHENZHEN GENVICT TECH
Radio base station
ActiveUS7986620B2Improve reception accuracyImprove transmission efficiencyError prevention/detection by using return channelSynchronisation arrangementData transmissionRadio Base Station
Owner:FUJITSU LTD
CATV trunk amplifier, upward signal amplifier, and bi-directional CATV system
InactiveUS7093276B2Improve reception accuracyReduce noiseTelevision system detailsPower distribution line transmissionAudio power amplifierTerminal equipment
In a CATV trunk amplifier, a downward signal input to an input terminal from the center equipment side is input to a downward amplifying circuit via a first filter and a second filter. The amplified downward signal is output to the terminal device side via the second filter, the first filter, and an output terminal. An upward L signal is input from the terminal device side via the output terminal to an upward L amplifying circuit via the first filter and a third filter. The amplified upward L signal is output to the center equipment side via the third filter, the first filter, and the input terminal. An upward H signal is input to an upward H amplifying circuit via a fourth filter. The amplified upward H signal is output to the center equipment side via the fourth filter and the input terminal.
Owner:MASPRODENKOH KK
OFDM radio communications system
InactiveUS7636366B2Small amount of calculationLittle deteriorationTransmission control/equlisationSpatial transmit diversityEngineeringRadio communications
A transmitter forms each subcarrier group of only frequency locations of subcarriers to which at least one pilot signal is allocated, and conducts transmission by allocating a macro-diversity signal into the subcarrier group and allocating a non-macro-diversity signal to other frequencies (outside the subcarrier group). As for the macro-diversity signal, a receiver conducts channel estimation on the basis of the pilot signal in the same subcarrier group as the macro-diversity signal. As for the non-macro-diversity signal outside the subcarrier group, the receiver conducts channel estimation on the basis of the pilot signal, and results of channel estimations of the macro-diversity signal and other non-macro-diversity signals.
Owner:FUJITSU TOSHIBA MOBILE COMM LTD
Acoustic synchronization method in distributed underwater acoustic network passive positioning system
InactiveCN108923874AImprove reception accuracySynchronous real-time high precisionPosition fixationTime-division multiplexTime informationPropagation delay
The invention discloses a synchronization method among distributed network nodes in an acoustic communication mode and belongs to the field of underwater acoustic communication. According to the method, acoustic propagation delay among fixed nodes is obtained through utilization of an acoustic communication process among the fixed nodes of a network; a clock of a master node in the network is taken as reference; a synchronization signal of the master node is taken as an alignment signal; time difference information from current signal transmitting time to positioning signal transmitting time is carried in the synchronization signal; and after sub-nodes receive the synchronization signal, time information in the synchronization signal is demodulated, the propagation delay between the masternode and the sub-nodes is subtracted by the time, and the time of transmitting positioning signals by the sub-nodes can be obtained, so the purpose of synchronously transmitting the positioning signals in the whole network is achieved. The method is characterized by that real-time high-precision synchronization of the whole system is realized in a positioning process, power consumption is low, and cost is low.
Owner:HARBIN ENG UNIV
Method and device for improving data receiving correctness of serial port
InactiveCN105446925AReduce workloadReduce work overheadEnergy efficient computingElectric digital data processingData transmissionSerial port
The invention discloses a method and a device for improving the data receiving correctness of a serial port, and belongs to the field of data transmission. The method comprises the following steps: S101: entering a UART (Universal Asynchronous Receiver and Transmitter) interrupt processing function; S102: reading a UART cache, and saving received data in an internal memory; S103: clearing UART interruption marks; and S104, detecting UART interruption marks, and carrying out S102 when one or more UART interruption marks is / are detected. Compared with the prior art, the method has the advantages that the work load of a microcontroller is reduced; adverse impact on current operation of the microcontroller is avoided; software running speed and efficiency are improved; the correctness of received data is improved; and system power consumption is reduced.
Owner:BEIJING TECHSHINO TECH
Method and apparatus for transferring signal data
ActiveUS8253354B2Improve reception accuracyIncrease capacityDC motor speed/torque controlPosition fixationContinuous signalData transmission
Owner:ABB (SCHWEIZ) AG
Anti-interference infrared remote control signal receiving circuit
InactiveCN102005113AEasy to acceptEfficient removalNon-electrical signal transmission systemsSignal processing circuitsEngineering
The invention discloses an anti-interference infrared remote control signal receiving circuit, which consists of a remote control signal receiving circuit, a remote control signal anti-interference circuit and a remote control signal processing circuit mutually connected in turn. The infrared remote control receiving circuit receives and demodulates infrared remote control signals through remote control receiving heads; a plurality of the remote control receiving heads are distributed on different parts and in different directions; the remote control signal anti-interference circuit is used for detecting and removing interference noise in the signals and correcting the interfered signal waveform; and the remote control signal processing circuit is responsible for recognizing and processing remote control commands. The anti-interference infrared remote control signal receiving circuit with anti-interference function is designed as a single circuit, can process the infrared remote control signals transmitted by multi-path infrared remote control receiving heads, can effectively remove the interference noise in the infrared remote control signals, and improves the accuracy of a digital signal processor (DSP) for receiving the infrared remote control commands in the remote control signal processing circuit.
Owner:广东欧加控股有限公司
Manchester code sampling processing method and module, and Manchester code decoder
InactiveCN108667757AImprove reception accuracyError preventionIndividual digits conversionValid ValueManchester code
Embodiments of the invention provide a Manchester code sampling processing method and module, and a Manchester code decoder which belong to the technical field of communication. The method includes the following steps: N time sampling is performed on a current half code element of a Manchester code at first clock frequency to obtain N sampling values of the current half code element, wherein the first clock frequency is N*2 times of transmission clock frequency of the Manchester code, N>1; and if more than half of the sampling values of the N sampling values are identical, it is determined that an effective value of the current half code element is the identical value. According to the method, multiple sampling processing is performed on the current half code element of the Manchester codeat the first clock frequency that is 2N times of the transmission clock frequency of the Manchester code to obtain the effective value with greater possibility of the current half code element, thereby effectively improving the reception correct rate of the Manchester code at a decoding terminal, and so, the decoding correct rate of the Manchester code at the decoding terminal is correspondinglyincreased.
Owner:AEROSPACE INFORMATION
Information determining method, signal receiving method and device
ActiveCN114189320AImprove reception accuracyModulated-carrier systemsTransmission path divisionTime domainTarget signal
Provided are an information determination method, a signal receiving method and apparatus, the method comprising: determining quasi co-located reference signal information of an aperiodic measurement reference signal resource according to first information, the first information comprising at least one of the following: a relationship between a first threshold and a time interval, whether an intersection is null, and whether the intersection is null; the time unit offset is a preset rule; the time interval is a time interval between the control information for scheduling the aperiodic measurement reference signal resource and the aperiodic measurement reference signal resource; the intersection is an intersection between a time domain symbol set where the aperiodic measurement reference signal resource is located and a time domain symbol set where the target channel or the target signal is located; the time unit offset is the time unit offset associated with a non-periodic measurement reference signal resource set where the non-periodic measurement reference signal resources are located.
Owner:ZTE CORP
MIPI signal receiving apparatus and method
ActiveUS20140211888A1Improve reception accuracySynchronisation error correctionStatic indicating devicesData streamByte
A signal receiving apparatus and method adapted for receiving a MIPI signal are disclosed. The signal receiving apparatus includes a signal receiver, a selector, a decoding apparatus and a byte boundary searcher. The signal receiver receives a clock signal, and obtains an input data stream according to the clock signal. The selector outputs the input data stream to a first or second output terminal according to a decoding error signal. The byte boundary searcher operates a boundary searching operation on the input data stream for generating a byte tuning information, wherein, the signal receiver adjusts the clock according to the byte tuning information for adjusting the input data stream.
Owner:NOVATEK MICROELECTRONICS CORP
Combiner, combiner and signal combiner system
ActiveCN105530039BImprove reception accuracyImprove stabilityRadio transmissionRadio-over-fibreComputer scienceDuplexer
Owner:CRSC COMM & INFORMATION
Anti-interference device for computer communication equipment
PendingCN111273744AReduce distractionsImprove anti-interferenceHardware monitoringInternal/peripheral component protectionCopper wireEngineering
The invention discloses an anti-interference device for computer communication equipment, and relates to the technical field of computer communication. The device comprises a box body, a signal processor and communication equipment, a box door is arranged at the front end of the box body; a handle is arranged at the right part of the box door; fixing pieces are arranged at the four corners of therear end of the box. An air inlet net is arranged on the upper portion of the left side wall of the box, an air outlet net is arranged on the lower portion of the right side wall of the box, a fan isarranged on the right portion of the lower side in the box, an antenna is arranged on the upper portion of the right side wall of the box, a first fixing frame is arranged on the upper portion in thebox, and a communication device is arranged at the upper end of the second fixing frame. According to the invention, the box body adopts a copper wire layer and iron wire layer anti-interference structure, and the positive and negative charge generator can form a shielding magnetic field, thereby facilitating the improvement of the anti-interference performance. Through the filtering of the filterand the further optimization of the signal processor, the signal receiving precision and the signal quality can be improved.
Owner:江西环境工程职业学院
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