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38results about How to "Guaranteed reception quality" patented technology

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Downlink transmission frequency division method for cooperating multipoint transmission system on the basis of service quality

InactiveCN102118759AGuaranteed reception qualityImprove reception performanceNetwork planningVIT signalsSubcarrier

The invention relates to a downlink transmission frequency division method for cooperating a multipoint transmission CoMP system on the basis of service quality, comprising the steps: a base station differentiates the type of ordered services so as to carry out frequency division according to test data from a user terminal, and also selects cell set participating in cooperative transmission according to the acquired information of the base station adjacent to the cell and according to the receiving power of detected signals; when subcarriers are distributed, the base station set time delay limit of signal transmission firstly, then the transmission time delay and the time delay limit of signals are compared, and real-time users and non-real-time users are differentiated; then the subcarriers are distributed according to the proportion fairness principle, and the feedback of the user terminal is received; firstly the user terminal for the real-time service acquires the substrates with good transmission quality according to the QoS priority order of the users; and then the remaining subcarriers are distributed to the user terminal for non-real-time service. In the downlink transmission frequency division method, not only are different requirements of users for bandwidth and time delay solved, the interference among the users of adjacent cells is also reduced, and the performance of edge-cell users is also improved.

Downlink transmission frequency division method for cooperating multipoint transmission system on the basis of service quality

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Owner:BEIJING UNIV OF POSTS & TELECOMM

Voice receiving quality detection method and apparatus, and terminal device

InactiveCN106453970AGuaranteed reception qualitySupervisory/monitoring/testing arrangementsSubstation equipmentTime segmentTerminal equipment

The invention discloses a voice receiving quality detection method and apparatus, and a terminal device. The method comprises the steps of detecting whether a difference value between voice signal intensity received by a first microphone hole and voice signal intensity received by a second microphone hole in the terminal device is greater than a preset threshold or not; if the difference value is greater than the preset threshold, detecting whether a time segment in which the difference value is greater than the preset threshold reaches a preset time threshold or not; and if the time segment reaches the preset time threshold, reminding a user to detect whether the microphone holes of the terminal device are shielded or not. According to the method, whether the microphone holes are shielded or not can be accurately detected; and when the microphone holes are shielded, the user is reminded, so that the quality of receiving voice data through the microphone holes is ensured.

Voice receiving quality detection method and apparatus, and terminal device

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Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Wireless base station, mobile station, wireless communication system, and wireless communication method

InactiveCN101360081AGuaranteed reception qualityAvoid lossMulti-frequency code systemsOrthogonal multiplexDistribution controlCommunications system

The invention provides a wire base station, a mobile station, a wireless communication system and a wireless communication method. The wireless base station (10) includes a multiplexing unit (13) generating user data; a channel assignment control unit (14) for selecting subcarrier groups from a plurality of subcarriers on two carriers, forming two wireless frames including subchannels generated from the subcarrier groups, and for time-division multiplexing and setting the user data and control data to the two wireless frames; and a transmitting and receiving unit (16) transmitting a wireless signal including the wireless frames, wherein the channel assignment control unit (14) divides all of the subchannels in the two wireless frames into areas of destination sectors, stores the control data only in the corresponding area, and stores the user data in all of the areas in the two wireless frames.

Wireless base station, mobile station, wireless communication system, and wireless communication method

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Owner:NTT DOCOMO INC

Base station apparatus, communication terminal apparatus and communication method

InactiveCN1389039AGuaranteed reception qualityPower managementSpatial transmit diversityMultiplexerHigh velocity

A data selector unit (151) selects, based on a decision by a destination deciding unit (106), only the transmitted data of a corresponding communication terminal apparatus. An application modulator unit (153) modulates an output signal of the data selector unit (151) according to a modulation system specified by a modulation system deciding unit (152). A spreader unit (154) spreads and outputs an output signal of the application modulator unit (153) to a code multiplexer unit (158). An individual pilot signal generator unit (155) generates an individual pilot signal. A modulator unit (156) modulates the individual pilot signal. A spreader unit (157) spreads and outputs an outputs signal of the modulator unit (156) to the code multiplexer unit (158). The code multiplexer unit (158) code multiplexes and outputs the output signals of the application spreader unit (154) and spreader unit (157) to a time multiplexer unit (162). In this way, in a case of effecting a downstream high-speed packet transmission, the quality of receiving the data portion can be maintained at a predetermined level even when the phase varies abruptly.

Base station apparatus, communication terminal apparatus and communication method

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Owner:PANASONIC CORP

Method and device in ue and base station usd for wireless communication

ActiveUS20190115996A1Guaranteed reception qualityReduce signaling overheadError prevention/detection by using return channelSpatial transmit diversityUser equipmentRadio signal

A method and a device in a User Equipment (UE) and a base station for wireless communication are disclosed. The UE transmits a first radio signal including M first-type radio signals transmitted by M antenna port groups and a second-type radio signal transmitted by a target antenna port group; the second-type radio signal carries uplink control information; and at least one of the following is used for determining the target antenna port group from the M antenna port groups: a first antenna port group, wherein a reception for a radio signal transmitted by the first antenna port group is used for generating the uplink control information; M time-frequency resources, wherein the M first-type radio signals are scheduled by M downlink signalings respectively, and the M downlink signalings are searched for in the M time-frequency resources respectively; and, first information, wherein the first information indicates explicitly the target antenna port group.

Method and device in ue and base station usd for wireless communication

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Owner:SHANGHAI LANGBO COMM TECH CO LTD

Method in UE supporting synchronization signals, method in base station supporting synchronization signals and devices

ActiveCN107959646AReduce overheadGuaranteed reception qualityRadio transmissionMulti-frequency code systemsTime durationBase station

The invention discloses a method in UE supporting synchronization signals, a method in a base station supporting the synchronization signals and devices. The UE receives a first wireless signal on a first time frequency resource and receives a second wireless signal on a second time frequency resource. The second time frequency resource is one in K candidate resources. A position of the second time frequency resource in the K candidate resources is used for determining at least one of {first time duration and R1 antenna ports}. The K is a positive integer greater than 1. The at least one of {length of CP corresponding to the first wireless signal, the length of the CP corresponding to the second wireless signal} is equal to the first time length. The R1 is the positive integer.

Method in UE supporting synchronization signals, method in base station supporting synchronization signals and devices

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Owner:SHANGHAI LANGBO COMM TECH CO LTD

Soil mass elastic wave velocity testing piezoelectric sensor for centrifugal model test

InactiveCN102645266AReduce the impactGuaranteed compression vibration effectVelocity propogationElectricityEngineering

The invention discloses a soil mass elastic wave velocity testing piezoelectric sensor for centrifugal model test. The sensor is formed by connecting two semi-cylindrical insulating bases into a cylindrical insulating base, wherein a circular ring stepped bore is arranged at the upper half of the insulating base, a cylindrical core seat which is radially provided with a rectangular groove is arranged in the center, a rectangular piezoelectric ceramic plate is embedded into the rectangular groove and extends out of the insulating base, a ring piezoelectric ceramic plate is sleeved outside the cylindrical core seat and is placed on the ledge of the circular ring stepped bore of the insulating base, glass cement is fully filled in the cavity of the insulating base, and the leads of both the rectangular piezoelectric ceramic plate and the ring piezoelectric ceramic plate are led out from the hole of the cylindrical surface of the insulating base. The soil mass elastic wave velocity testing piezoelectric sensor for centrifugal model test has smaller dimensions and less influences to a model soil mass during the centrifugal model test; the lower end of the rectangular piezoelectric ceramic plate is fixed by the cylindrical core seat to form a cantilever structure, the ring piezoelectric ceramic plate is fixed outside the cylindrical core seat, so the signal quality of shear and compressional waves is ensured; and the soil mass elastic wave velocity testing piezoelectric sensor for centrifugal model test has the function of simultaneously testing the shear and compressional waves.

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Owner:ZHEJIANG UNIV

Acquisition method and system for reference clock signal

InactiveCN102457956ALow priceExpandable installation distanceSynchronisation arrangementTime-division multiplexGeneral Packet Radio ServiceComputer science

The invention discloses an acquisition method and a system for a reference clock signal, wherein the method comprises the following steps of: receiving a GPRS (General Packet Radio Service) satellite signal by GPRS receiving equipment; generating a TOD signal and an IPPS signal, and converting the TOD signal and the IPPS signal with electrical signal forms into optical signal forms, and sending the TOD signal and the IPPS signal with optical signal forms to a reduction device through an optical fiber; receiving the TOD signal and the IPPS signal with optical signal forms by the reduction device, recovering the TOD signal and the IPPS signal with optical signal forms to be the TOD signal and the IPPS signal with electrical signal forms, and compensating the IPPS signal with an electrical signal form, and making the TOD signal with an electrical signal form and the compensated IPPS signal as the reference clock signal. Through the method and the system, an installation distance for a GPRS antenna can be enlarged, and quality for reception for the GPRS satellite signal can be guaranteed; moreover, cost for the optical fiber is cheap, and erection cost for the GPRS antenna can be favorably reduced.

Acquisition method and system for reference clock signal

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Owner:ZTE CORP

Method and device for processing received signals of wireless communication system terminals

ActiveCN101651513AGuaranteed reception qualityLittle degradation in signal-to-noise ratioEnergy efficient ICTError preventionSignal-to-noise ratio (imaging)Wireless communication systems

The invention discloses a method and a device for processing received signals of wireless communication system terminals, which ensures the HSDPA signal-receiving quality of the terminals. The invention adopts a technical scheme that the method comprises: acquiring a modulation mode of HS-PDSCH signals in advance by resolving HS-SCCH information; utilizing the time left by acquiring the modulationmode of the HS-PDSCH signals in advance to reset a receiving channel according to the modulation mode, control the ratio of quantization noise to noise power and reduce deterioration of the quantization noise to the demodulation of signal-to-noise ratio; and receiving HS-PDSCH information through the reset receiving channel. This invention is applied in the field of mobile communication.

Method and device for processing received signals of wireless communication system terminals

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Owner:LEADCORE TECH

Technique for delivering content to a user

InactiveUS20120072604A1Drop in qualityQuality improvementMultiple digital computer combinationsTransmissionContent deliveryWorld Wide Web

A technique is provided for delivering content to a user. The user sends at least one quality indicator to a first content-delivery device, referred to as a secondary device. The indicator relates to delivery of a portion of the content by a second content-delivery device, referred to as a primary device. When the secondary device detects an event that might affect the delivery of the content by the primary device to the user, on the basis at least of the quality indicators relating to at least a delivery of content by the primary device, it commands the user to transfer from the primary device to the secondary device in order to enable the secondary device to deliver portions of the content that have not been delivered by the primary device.

Technique for delivering content to a user

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Owner:FRANCE TELECOM SA

Virtual closed loop power control method used in uncontinuous transmission period

InactiveCN101399573AImplement power controlGuaranteed continuityTransmission control/equalisingHigh level techniquesComputer hardwareClosed loop

The invention discloses a virtual closed loop power control method used in a discontinuity transmission period. In receiving two gusty front and back interval periods of the same transmitting terminal, the method carries out a single operation as follows every a period of fixed time: Virtual signal to interference ratio is calculated; a corresponding TPC command word is set up according to the calculated virtual SIR; the TPC command word is transmitted to an emission end. Good power control effect can be obtained by using the method, thus guaranteeing the reception quality of the emission end and controlling disturbance on other users.

Virtual closed loop power control method used in uncontinuous transmission period

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Owner:TD TECH COMM TECH LTD

Multimedia broadcast multicast data sending/receiving method, apparatus and system

InactiveCN101425873AShorten receiving timeReduce receiving power consumptionSpecial service provision for substationReceiver specific arrangementsLow-density parity-check codeEnvironmental quality

The invention discloses a multimedia broadcast / multicast data transmitting / receiving method, a device and a system. The method comprises the following steps: the multimedia broadcast / multicast data are decoded by low-density parity check codes (LDPC); service data after being decoded can be divided into first information and second information, and then the first information and the second information are transmitted; a receiving terminal judges the environmental quality of a signal path where the receiving end is located; when the environmental quality of the signal path is good, only the first information can be received; while the environmental quality of the signal path is poor, both the first information and the second information can be received. According to different signal path environment where the receiving terminal is located, the receiving terminal can achieve the purpose by adopting the invention that the MBMS service data can be received with lower receiving power while ensuring the received service data quality.

Multimedia broadcast multicast data sending/receiving method, apparatus and system

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Owner:HUAWEI TECH CO LTD

Bidirectional satellite communication antenna

InactiveCN112186326AReceiving location is goodLifting operation saves time and effortAntenna supports/mountingsTelecommunicationsControl theory

The invention relates to the technical field of communication, and discloses a bidirectional satellite communication antenna and a using method thereof. The bidirectional satellite communication antenna comprises a movable fixing bottom plate, wherein a lifting adjusting device is arranged on the upper surface of the movable fixing bottom plate, a lifting supporting plate is fixedly connected to the upper surface of the lifting adjusting device, a circular rotating disc is arranged on the upper surface of the lifting supporting plate, a two-way swing device is arranged on the upper surface ofthe circular rotating disc, and supporting stabilizing devices are arranged on the front side and the rear side of the upper surface of the movable fixing bottom plate correspondingly. According to the bidirectional satellite communication antenna and the using method thereof, a first electric push rod drives a rotary pull rod and a first stable sliding frame to move outwards, the first stable sliding frame drives a linkage supporting rod and a lifting supporting plate to move upwards for height adjustment, lifting operation is more time-saving and labor-saving, and convenient adjustment can be conducted; therefore, the feed source can find a better receiving position, stable receiving of signals of the antenna is ensured, and the use convenience is further improved.

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Owner:广州郝舜科技有限公司

Method and device in wireless transmission

ActiveUS20190208527A1Maintain robustnessQuality assuranceSpatial transmit diversityError preventionWireless transmissionComputer science

The present disclosure provides a method and a device in wireless transmission. A User Equipment (UE) first receives a first signaling, and then receives a first radio signal, the first radio signal carrying a first bit block. The first signaling is used for determining a transmission format corresponding to the first radio signal. The transmission format corresponding to the first radio signal is one transmission format in a first format set, and the first format set comprises a first transmission format and a second transmission format. A radio signal corresponding to the first transmission format includes P radio sub-signal(s), each one of the P radio sub-signal(s) carries the first bit block, and the P radio sub-signal(s) is(are) transmitted by a same antenna port group.

Method and device in wireless transmission

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Owner:SHANGHAI LANGBO COMM TECH CO LTD

Stereo playing system for mobile TV

InactiveCN101052111APrevents reduction in receiver sensitivityGuaranteed reception qualityTelevision system detailsColor television detailsStereophonic soundMobile television

The invention comprises: a D class amplifier; and a resonant circuit between the output of the amplifier and a stereo speaker or a earphone, which is used for removing EMI interference; the self-resonance point of the resonant circuit is at 470 MHZ where the maximum interference is generated; by the resonant circuit, the falling of receiving sensitivity caused by D class amplifier can be avoided.

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Owner:ZTE CORP

Non-woven fabric melt-blowing forming method

ActiveCN111468488ACircumstances affecting normal workGuaranteed filtering effectGas treatmentDispersed particle filtrationAir pumpElectric machinery

The invention relates to a non-woven fabric melt-blowing forming method. A roller receiving device is adopted. The roller receiving device comprises a base plate, an installing frame, a receiving roller and a cleaning mechanism. The specific method for treating a melt-blowing non-woven fabric by adopting the roller receiving device comprises the steps of polymer feeding, melt extrusion, fiber forming, net forming and roller cleaning. The receiving roller comprises a rotating motor, a rotating cylinder, an inner cylinder, a rotating rod, a driving motor, an air pump and a filter module. The filter module comprises a rotating ring, a filter cloth, a driven gear ring and a driving gear ring. The cleaning mechanism comprises a lifting air cylinder, a lifting plate, a bearing plate, a cleaningbrush, a rotating motor, a rotating cam and a connecting sliding block. The air pump and the external environment are isolated through the filter module, the phenomenon that normal work of the air pump is affected due to the fact that external impurities enter a pipeline, and the pipeline is blocked can be effectively avoided, and the surface of the receiving roller can be cleaned through the cleaning mechanism so as to ensure the receiving quality.

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Owner:山东莱芬无纺布有限公司

Sector selection method in cell switch and base station controller

ActiveCN103229549AGuaranteed reception qualityIncrease profitWireless communicationResource utilizationRadio frequency

The embodiment of the invention provides a sector selection method in cell switch and a base station controller. The method includes: determining a first sector which is the sector in a service cell of a piece of user equipment and is also the sector the user equipment is currently in; determining adjacent sectors of the first sector and judging whether the adjacent sectors are the sectors of a target cell to which the user equipment is switched, and the target cell is the adjacent cell of the service cell; and activating the radio remote units (RRU) or radio frequency units (RFU) of at least one second sector according to the judging result so that the RRUs or RFUs of the at least one second sector send information to the user equipment and the at least one second sector is the sector of the target cell. Thus resource utilization rate is effectively improved and interferences from adjacent cells of the same frequency are reduced while receiving quality of the user equipment is ensured.

Sector selection method in cell switch and base station controller

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Owner:HUAWEI TECH CO LTD

Real-time adaptive optical self-interference elimination system and method based on FPGA and STM32

ActiveCN112600587AAccurate execution basisFast Execution BasisTransmissionInterference (communication)Baseband

The invention provides a real-time adaptive optical self-interference elimination system and a real-time adaptive optical self-interference elimination method based on FPGA and STM32. The real-time adaptive optical self-interference elimination method comprises the following steps: a baseband real-time transceiving module completes real-time transmission of baseband OFDM signals; the up-down frequency conversion module completes conversion between the baseband of the signal and the working frequency band of the antenna to obtain a radio frequency signal of local communication information; a radio frequency signal of the local communication signal is copied into a reference signal, and is sent through a radio frequency antenna module; the radio frequency antenna module receives a radio frequency useful signal from another communication unit and a time-varying radio frequency self-interference signal of a transmitting antenna close to the receiving antenna; after the optical self-interference elimination module receives a useful signal and a self-interference signal, the amplitude and phase of a reference signal are adjusted through the self-adaptive control module, the reference signal and the self-interference signal are cancelled out through a balance photoelectric detector in the optical self-interference elimination module, and the useful signal after self-interference elimination is obtained; and the useful signal after elimination of the self-interference is converted to a baseband and then is sent to a receiving end.

Real-time adaptive optical self-interference elimination system and method based on FPGA and STM32

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Owner:SHANGHAI JIAO TONG UNIV

Wireless base station, mobile station, wireless communication system, and wireless communication method

InactiveCN101360081BGuaranteed reception qualityAvoid lossMulti-frequency code systemsOrthogonal multiplexDistribution controlCommunications system

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Owner:NTT DOCOMO INC

Low-profile double-frequency common-caliber monopole antenna based on cross-layer folding structure

ActiveCN113097704AReduce volumeReduce weightRadiating elements structural formsElongated active element feedDielectric substrateEngineering

The invention discloses a low-profile double-frequency common-caliber monopole antenna based on a cross-layer folding structure. The antenna comprises an upper-layer dielectric substrate, a lower-layer dielectric substrate and a feed probe. The upper-layer dielectric substrate is directly stacked above the lower-layer dielectric substrate; the upper dielectric substrate is provided with a first non-metallized via hole; the lower dielectric substrate is provided with a second non-metallized via hole; and the feed probe passes through the second non-metallized via hole and the first non-metallized via hole for direct feed. The invention has the beneficial effects that the thickness of the patch antenna is further reduced on the premise of ensuring that the two frequency bands have enough bandwidth, and the center frequencies of the two frequency bands can be independently adjusted, so the patch antenna is suitable for various application scenes.

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Owner:SOUTH CHINA UNIV OF TECH

Sector selection method and base station controller during cell handover

ActiveCN103229549BGuaranteed reception qualityIncrease profitWireless communicationResource utilizationRadio frequency

Embodiments of the present invention provide a method for sector selection during cell handover and a base station controller. The method includes: determining a first sector, which is a sector in a serving cell of a user equipment and is the The sector in which the user equipment is currently located; determine the adjacent sectors of the first sector, and determine whether the adjacent sectors are sectors in the target cell to which the user equipment is switched, and the target cell is the Neighboring cells of the serving cell; activate the radio frequency remote unit RRU or radio frequency unit RFU of at least one second sector according to the judgment result, so that the RRU or RFU of the at least one second sector sends information to the user equipment , the at least one second sector is a sector in the target cell. In this way, while ensuring the reception quality of the user equipment, resource utilization can be effectively improved and interference to adjacent cells on the same frequency can be reduced.

Sector selection method and base station controller during cell handover

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Owner:HUAWEI TECH CO LTD

Terminal switching method, base station and communication system

InactiveCN102422672BShort switching timeGuaranteed reception qualityError prevention/detection by using return channelNetwork traffic/resource managementCommunications systemBase station

A terminal switching method for switching terminals, in a communication system in which HARQ processing is performed, to which a base station grants a transmission permission, from a terminal A to a terminal B includes a step of notifying the terminal B of aborting of the transmission permission, a step of setting a time point at which an HARQ process whose state of the HARQ processing is a retransmission waiting state with the terminal A is performed as a virtual starting point, a step of setting a retransmission waiting window having a predetermined window length with the virtual starting point being regarded as its starting point, and a step of notifying the terminal B of the transmission permission when there is no HARQ process having the retransmission waiting state with the terminal A, wherein the virtual starting point setting and the window setting are repeated until there is no HARQ process having the retransmission waiting state with the terminal A.

Terminal switching method, base station and communication system

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Owner:MITSUBISHI ELECTRIC CORP +1

Method and device in UE supporting synchronization signal and base station

ActiveCN107959646BReduce overheadGuaranteed reception qualityRadio transmissionMulti-frequency code systemsElectrical and Electronics engineeringReal-time computing

The invention discloses a method and a device in a UE and a base station supporting synchronization signals. The UE first receives the first wireless signal on the first time-frequency resource, and then receives the second wireless signal on the second time-frequency resource. Wherein, the second time-frequency resource is one of K candidate resources, and the position of the second time-frequency resource in the K candidate resources is used to determine {the first time length, R1 antenna ports} at least one of the . The K is a positive integer greater than 1. At least one of {the length of the CP corresponding to the first wireless signal, the length of the CP corresponding to the second wireless signal} is equal to the first time length. The R1 is a positive integer.

Method and device in UE supporting synchronization signal and base station

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Owner:SHANGHAI LANGBO COMM TECH CO LTD

Wireless base station, mobile station, radio communication system, and radio communication method

InactiveCN101282188BImprove throughputAvoid missingTransmission path divisionFrequency-division multiplexCommunications systemCarrier signal

The object of the present invention is to achieve reduction of interference between cells and improvement of maximum throughput so as to improve spectrum efficiency. A wireless base station (10) which transmits a radio signal between itself and a plurality of mobile stations (20) by means of OFDMA includes: a multiplexing part (13) for generating user data; a channel assignment control part (14) for selecting a plurality sets of sub-carriers among a plurality of sub-carriers so as to constitute a radio frame containing sub-channels assigned to each of the plurality sets of sub-carriers and for setting in the radio frame the user data and control data by means of orthogonal frequency division multiplexing; and a transmission part (16) for transmitting a radio signal containing the radio frame; where, the channel assignment control part (14) is constituted so that the radio frame is divided into 2 zones for the control and user data and all the sub-channels in the zone for control data are divided into groups for each of sectors; the control data is allocated on the corresponding divided groups; and the user data is allocated on all the sub-channels in the zone for user data.

Wireless base station, mobile station, radio communication system, and radio communication method

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Owner:NTT DOCOMO INC

Movable installation device and installation method of microseismic sensor

ActiveCN112068192BImprove sealingAvoid problems with poor grout qualitySeismic signal receiversSeismic signal processingEngineeringSlurry

The invention discloses a movable installation device and installation method of a microseismic sensor, wherein the device includes a grouting installation assembly and a grouting assembly, the grouting installation assembly includes an exhaust pipe, a grouting pipe and several wave guide rods, and the grouting assembly The assembly includes the part of the plug near the bottom of the hole, the part of the plug near the orifice and the compression nut; both parts of the plug are cylindrical structures with one end open, and the bottom is equipped with an exhaust pipe through hole, injection The through hole of the slurry pipe and the through hole of the probe; the overall structure of the probe obtained by connecting several probes end to end in turn, together with the exhaust pipe and the grouting pipe, all pass through the corresponding through holes on the grouting component, and the top guide The part of the wave rod protruding out of the plug near the hole is connected with the compression nut, and the compression nut is pushed by the external force to embed the part of the plug near the hole into the inner surface of the plug near the bottom of the hole, so that the plug is close to the bottom of the hole. The bottom part of the hole expands radially; in addition, the overall structure of the probe protrudes from the top of the compression nut and is fixedly connected with the microseismic sensor. The invention can ensure the sealing quality and achieve the purpose of no slurry leakage.

Movable installation device and installation method of microseismic sensor

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Owner:CENT SOUTH UNIV

Beamforming Method for Pilot Contamination Suppression in Massive MIMO Systems

InactiveCN104320170BReduce distractionsGuaranteed reception qualitySpatial transmit diversityChannel estimationEngineeringData transmission

The invention discloses a pilot pollution abatement beam forming method for a large-scale MIMO system. The pilot pollution abatement beam forming method for the large-scale MIMO system comprises the following steps that (1) it is supposed that the MIMO system comprises L cells, each cell is provided with one base station with M antennas, and all the base stations of the MIMO system are divided into N groups; (2) the optimal beam forming vector of the kth user in the ith cell is obtained according to generalized Rayleigh entropy, the optimal beam forming vector of each user in each group is obtained, and then data transmission is carried out in the MIMO system according to the optimal beam forming vector of each user in each group. According to the pilot pollution abatement beam forming method for the large-scale MIMO system, the channel estimation precision and the spectrum efficiency performance of a multi-cell large-scale MIMO system can be improved, and the expense of the system is low.