Patents by Inventor Ruiqi Zhang
Ruiqi Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20190036581Abstract: A channel state information sending method, a channel state information receiving method, and a device are disclosed, to reduce resource overheads required when a terminal device feeds back CSI to a network device in a scenario of a high precision codebook-based precoding matrix. The method includes: determining, by a terminal device, a precoding matrix W; sending, by the terminal device, a signal including CSI to a network device; obtaining, by the network device, an RI and indication information based on the signal including the CSI; obtaining, by the network device, a PMI2 based on the RI and the indication information; and determining, by the network device, the precoding matrix W based on the rank indicator RI and the second precoding matrix indicator PMI2.Type: ApplicationFiled: September 28, 2018Publication date: January 31, 2019Applicant: HUAWEI TECHNOLOGIES CO.,LTD.Inventors: Ruiqi Zhang, Xueru Li, Di Zhang
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Publication number: 20190007108Abstract: Embodiments of the present invention disclose a channel quality index measurement method and apparatus. The method includes: determining, by a base station, a target CSI-RS on each of time-frequency resources corresponding to resource numbers of a terminal, where the target CSI-RS is a precoded CSI-RS, and the time-frequency resource is a resource element used to transmit the CSI-RS or the target CSI-RS; sending, by the base station, the target CSI-RS on each of the time-frequency resources corresponding to the resource numbers to the terminal on the time-frequency resource; sending, by the base station to the terminal, indication information used to indicate the resource numbers of the terminal; and receiving, by the base station, a CQI that is sent by the terminal and that is used to indicate channel quality.Type: ApplicationFiled: September 10, 2018Publication date: January 3, 2019Inventors: Ruiqi Zhang, Bingyu Qu
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Publication number: 20180309486Abstract: A precoding matrix determining method and apparatus are provided. A terminal determines a precoding matrix, where the precoding matrix includes at least two column vector sets, a column vector associated with any column vector set of the at least two column vector sets exists in the at least two column vector sets, and both the any column vector set and the associated column vector are applied on different polarization antennas; the terminal determines a first precoding matrix indicator (PMI) and a second PMI based on the precoding matrix; and the terminal sends the first PMI and the second PMI to a base station. In this solution, different column vectors are applied to different polarization antennas. Therefore, a prior-art defect of unbalanced beam coverage performance is overcome.Type: ApplicationFiled: June 28, 2018Publication date: October 25, 2018Inventors: Ruiqi ZHANG, Qiang WU
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Publication number: 20180227093Abstract: A method for transmitting data includes grouping resource elements (REs) of orthogonal frequency division multiplexed (OFDM) symbols of a physical resource block (PRB) into at least one paired RE and at least one orphan RE, transmitting the at least one paired RE in accordance with space frequency block coding (SFBC), and transmitting the at least one orphan RE in accordance with a precoder.Type: ApplicationFiled: September 15, 2017Publication date: August 9, 2018Inventors: Bin Liu, Ruiqi Zhang
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Publication number: 20180212661Abstract: A method and an apparatus for reporting channel state information and an electronic device. The method includes: obtaining to-be-reported channel state information CSI, where the channel state information includes a first part and a second part, the first part includes indication information used for beam selection, and the second part includes information other than the indication information used for beam selection; and reporting the channel state information to a first device in a preset reporting manner including a first and a second manner. The first manner includes: transmitting the first part on a first channel, and transmitting the second part on a second channel. The second manner includes: transmitting both the first part and the second part on the first channel. In the present disclosure, reporting of a beam selection indication can be implemented, while a new format for a PUCCH or a PUSCH is not needed.Type: ApplicationFiled: March 23, 2018Publication date: July 26, 2018Inventors: Jianqin LIU, Ruiqi ZHANG, Kunpeng LIU
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Publication number: 20180213527Abstract: Embodiments of the present invention disclose a resource selection method and apparatus. The method includes: configuring a CSI process for a second device, where the CSI process is corresponding to configuration information of K reference signal resources or configuration information of K reference signal antenna port groups; and sending a reference signal to the second device according to the configuration information corresponding to the CSI process, so that the second device obtains a corresponding channel quality measurement result by measuring the reference signal, where the channel quality measurement result includes a precoding matrix indicator (PMI), the PMI is used to indicate a serial number of a precoding matrix selected by the second device, the selected precoding matrix is a matrix in a preset precoding matrix set, and the preset precoding matrix set is determined according to K and a quantity T of beams that need to be selected.Type: ApplicationFiled: March 23, 2018Publication date: July 26, 2018Inventors: Jianqin LIU, Ruiqi ZHANG, Kunpeng LIU
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Publication number: 20170288307Abstract: The invention discloses a beamforming method for polarized antenna array consisting of a plurality of antenna elements, applied to single layer beamforming or dual layer beamforming, which includes the steps: determining (201) first beamforming weights for phase compensation among the antenna elements within each polarization direction; determining (202) second beamforming weights for phase compensation between equivalent channels of two polarization directions; and calculating (203) hybrid beamforming weights as product of the first beamforming weights and the second beamforming weights. A beamforming apparatus for polarized antenna array is also provided in the invention as well as a radio communication device and a system thereof With the invention, the single-layer and dual-layer beamforming weights are determined for the cross-polarized antenna array without requiring full channel knowledge or the aid of PMI. Computation complexity is lowered and full power amplifier utilization can be achieved.Type: ApplicationFiled: June 19, 2017Publication date: October 5, 2017Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Yang HU, David ASTELY, Zhiheng GUO, Muhammad lmadur RAHMAN, Hai WANG, Ruiqi ZHANG
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Publication number: 20170175502Abstract: A submersible reciprocating oil well pump unit, including: a control cabinet, a rotary type submersible motor, a borehole torque reversing device, a borehole reciprocating pump, a submersible cable, a first joint, a second joint, and an oil pipe. The control cabinet is disposed at wellhead and connected to the rotary type submersible motor submerged in a downhole sleeve via the submersible cable. The motor shaft is connected to one end of the screw rod of the screw pair of the borehole torque reversing device via the first joint. One end of the driving rod is connected to a push-pull rod of the borehole reciprocating pump via the second joint. The oil outlet is connected to the oil pipe. The borehole torque reversing device is adapted to drive the control cabinet to commutate automatically according to set loading values.Type: ApplicationFiled: March 9, 2017Publication date: June 22, 2017Inventors: Xihuan ZHAO, Ruiqi ZHANG
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Patent number: 9685702Abstract: The invention discloses a beamforming method for polarized antenna array consisting of a plurality of antenna elements, applied to single layer beamforming or dual layer beamforming, which includes the steps: determining (201) first beamforming weights for phase compensation among the antenna elements within each polarization direction; determining (202) second beamforming weights for phase compensation between equivalent channels of two polarization directions; and calculating (203) hybrid beamforming weights as product of the first beamforming weights and the second beamforming weights. A beamforming apparatus for polarized antenna array is also provided in the invention as well as a radio communication device and a system thereof. With the invention, the single-layer and dual-layer beamforming weights are determined for the cross-polarized antenna array without requiring full channel knowledge or the aid of PMI. Computation complexity is lowered and full power amplifier utilization can be achieved.Type: GrantFiled: December 17, 2010Date of Patent: June 20, 2017Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Yang Hu, David Astely, Zhiheng Guo, Muhammad Imadur Rahman, Hai Wang, Ruiqi Zhang
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Patent number: 9319185Abstract: Wireless communications may benefit from a method, an arrangement, and a detector for detecting HARQ-ACK information. According to embodiments of the present invention, the method comprises extracting a HARQ-ACK symbol sequence in data transmitted from a user equipment. The method also comprises generating a plurality of candidate HARQ-ACK symbol sequences. The method further comprises calculating a degree of similarity between each of the plurality of candidate HARQ-ACK symbol sequences and the extracted HARQ-ACK symbol sequence to obtain a plurality of degrees of similarity. The method additionally comprises comparing an extremum of the plurality of degrees of similarity with a predetermined threshold. Furthermore, the method comprises determining, based upon the comparing, whether the HARQ-ACK information has been transmitted from the user equipment.Type: GrantFiled: May 28, 2012Date of Patent: April 19, 2016Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Hai Wang, Peng Li, Shaowei Yu, Ruiqi Zhang
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Patent number: 9160389Abstract: A hybrid combining method in a receiver is provided, and the method includes that wideband combining, e.g. using a maximum ratio combining (MRC) or an interference rejection combing (IRC) process, to combine signals distributed over a first plurality of subcarrier frequencies from antennas in the same polarization direction is performed, resulting in a combined signal for each polarization direction that is distributed over a smaller number of subcarrier frequencies, then a two-port narrowband IRC is done of these wideband combined signals for the two polarization directions, resulting in a diversity combined signal.Type: GrantFiled: October 19, 2011Date of Patent: October 13, 2015Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Zhiheng Guo, Hai Wang, Ruiqi Zhang
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Publication number: 20150229427Abstract: A method (10) of noise power estimation for PUCCH format 1/1a/1b in LTE system is provided which comprises: determining (11) at least one unused orthogonal cover code, OCC for data symbols and reference symbols in the PUCCH, and estimating (12) noise power by employing the at least one unused OCC, for Signal-Noise Ratio, SNR, calculation and Discontinuous Transmission, DTX, detection. Also, an apparatus of noise power estimation for PUCCH format 1/1a/1b in LTE system is provided. The performance of the noise estimation may be greatly improved, and thus enhancing PUCCH detection accuracy, especially in case of a large number of users in the network.Type: ApplicationFiled: September 20, 2012Publication date: August 13, 2015Inventors: Wei WANG, Ruiqi ZHANG
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Publication number: 20150172006Abstract: Wireless communications may benefit from a method, an arrangement, and a detector for detecting HARQ-ACK information. According to embodiments of the present invention, the method comprises extracting a HARQ-ACK symbol sequence in data transmitted from a user equipment. The method also comprises generating a plurality of candidate HARQ-ACK symbol sequences. The method further comprises calculating a degree of similarity between each of the plurality of candidate HARQ-ACK symbol sequences and the extracted HARQ-ACK symbol sequence to obtain a plurality of degrees of similarity. The method additionally comprises comparing an extremum of the plurality of degrees of similarity with a predetermined threshold. Furthermore, the method comprises determining, based upon the comparing, whether the HARQ-ACK information has been transmitted from the user equipment.Type: ApplicationFiled: May 28, 2012Publication date: June 18, 2015Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Hai Wang, Peng Li, Shaowei Yu, Ruiqi Zhang
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Patent number: 9001935Abstract: The present invention relates to a receiving node, and to a related method of adjusting a frequency domain channel estimate in a receiving node of a wireless communication system using Orthogonal Frequency Division Multiplexing. The method comprises estimating (210) a phase rotation of the frequency domain channel estimate, and compensating (220) for the estimated phase rotation in the frequency domain channel estimate. It also comprises transforming (230) the compensated frequency domain channel estimate into a time domain channel estimate, filtering (240) the time domain channel estimate to suppress noise, transforming (250) the filtered time domain channel estimate back into a noise suppressed frequency domain channel estimate, and adding (260) the estimated phase rotation in the noise suppressed frequency domain channel estimate to achieve an adjusted and improved frequency domain channel estimate.Type: GrantFiled: October 25, 2010Date of Patent: April 7, 2015Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Zhiheng Guo, Ruiqi Zhang, Hai Wang
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Patent number: 8848778Abstract: The present invention relates to a method for generating impairment covariances for equalization in a receiver of a wireless communication system, as well as an covariance estimator, a receiver and a wireless communication system associated therewith, where the receiver is equipped with multiple antennas, and an impairment covariance matrix is used to calculate equalization weighting vector for signals transmitted by a transmitter, the method comprising the steps of: calculating a raw impairment covariance estimate between a first antenna and a second antenna of the multiple antennas on each of subcarriers allocated to the transmitter in frequency domain, transforming the raw impairment covariance estimates into time domain, masking the transformed impairment covariance estimates by a triangle window with a width defined by a maximum delay spread, determining a threshold based on the transformed impairment covariance estimates for the subcarriers and thresholding the masked impairment covariance estimates witType: GrantFiled: December 8, 2010Date of Patent: September 30, 2014Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Zhiheng Guo, Hai Wang, Ruiqi Zhang
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Publication number: 20140242934Abstract: A hybrid combining method in a receiver is provided, and the method includes that wideband combining, e.g. using a maximum ratio combining (MRC) or an interference rejection combing (IRC) process, to combine signals distributed over a first plurality of subcarrier frequencies from antennas in the same polarization direction is performed, resulting in a combined signal for each polarization direction that is distributed over a smaller number of subcarrier frequencies, then a two-port narrowband IRC is done of these wideband combined signals for the two polarization directions, resulting in a diversity combined signal.Type: ApplicationFiled: October 19, 2011Publication date: August 28, 2014Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Zhiheng Guo, Hai Wang, Ruiqi Zhang
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Publication number: 20140211892Abstract: The present invention relates to a receiving node, and to a related method of adjusting a frequency domain channel estimate in a receiving node of a wireless communication system using Orthogonal Frequency Division Multiplexing. The method comprises estimating (210) a phase rotation of the frequency domain channel estimate, and compensating (220) for the estimated phase rotation in the frequency domain channel estimate. It also comprises transforming (230) the compensated frequency domain channel estimate into a time domain channel estimate, filtering (240) the time domain channel estimate to suppress noise, transforming (250) the filtered time domain channel estimate back into a noise suppressed frequency domain channel estimate, and adding (260) the estimated phase rotation in the noise suppressed frequency domain channel estimate to achieve an adjusted and improved frequency domain channel estimate.Type: ApplicationFiled: October 25, 2010Publication date: July 31, 2014Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Zhiheng Guo, Ruiqi Zhang, Hai Wang
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Publication number: 20130257655Abstract: The invention discloses a beamforming method for polarized antenna array consisting of a plurality of antenna elements, applied to single layer beamforming or dual layer beamforming, which includes the steps: determining (201) first beamforming weights for phase compensation among the antenna elements within each polarization direction; determining (202) second beamforming weights for phase compensation between equivalent channels of two polarization directions; and calculating (203) hybrid beamforming weights as product of the first beamforming weights and the second beamforming weights. A beamforming apparatus for polarized antenna array is also provided in the invention as well as a radio communication device and a system thereof. With the invention, the single-layer and dual-layer beamforming weights are determined for the cross-polarized antenna array without requiring full channel knowledge or the aid of PMI. Computation complexity is lowered and full power amplifier utilization can be achieved.Type: ApplicationFiled: December 17, 2010Publication date: October 3, 2013Applicant: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Yang Hu, David Astely, Zhiheng Guo, Muhammad Imadur Rahman, Hai Wang, Ruiqi Zhang
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Publication number: 20130243069Abstract: The present invention relates to a method for generating impairment covariances for equalization in a receiver of a wireless communication system, as well as an covariance estimator, a receiver and a wireless communication system associated therewith, where the receiver is equipped with multiple antennas, and an impairment covariance matrix is used to calculate equalization weighting vector for signals transmitted by a transmitter, the method comprising the steps of: calculating a raw impairment covariance estimate between a first antenna and a second antenna of the multiple antennas on each of subcarriers allocated to the transmitter in frequency domain, transforming the raw impairment covariance estimates into time domain, masking the transformed impairment covariance estimates by a triangle window with a width defined by a maximum delay spread, determining a threshold based on the transformed impairment covariance estimates for the subcarriers and thresholding the masked impairment covariance estimates witType: ApplicationFiled: December 8, 2010Publication date: September 19, 2013Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Zhiheng Guo, Hai Wang, Ruiqi Zhang
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Patent number: 8462904Abstract: A noisy frequency-domain channel estimate enhancer includes an over-sampler configured to transform the noisy frequency-domain channel estimate into a time-domain channel estimate that is virtually over-sampled by an integer factor m. The over-sampler is connected to a de-interleaver configured to divide the time-domain channel estimate into m de-interleaved sub-vectors. The de-interleaver is connected to a suppressor configured to suppress noisy taps from each de-interleaved sub-vectors to form m noise suppressed sub-vectors. The suppressor is connected to a selector configured to select a noise suppressed sub-vector associated with a highest signal-to-noise ratio. The selector is connected to a discrete Fourier transformer configured to transform the selected noise suppressed sub-vector into a noise suppressed preliminary frequency-domain channel estimate.Type: GrantFiled: February 22, 2011Date of Patent: June 11, 2013Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Zhiheng Guo, Hai Wang, Ruiqi Zhang