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公开(公告)号：US20190312697A1
公开(公告)日：2019-10-10
申请号：US16349014
申请日：2017-12-28
Inventor： Hui LI , Qiubin GAO , Rakesh TAMRAKAR , Xin SU , Runhua CHEN , Qiuping HUANG , Chuanjun LI , Mengjun WANG
IPC: H04L5/00 , H04B7/0456
Abstract: The present disclosure provides a reference signal transmission method, a transmitter and a receiver. The reference signal transmission method includes: precoding, by a transmitter, a data stream for user data through a second precoding matrix so as to acquire D virtual data streams; precoding, by the transmitter, the D virtual data streams through a first precoding matrix, and transmitting the D precoded virtual data streams to a receiver via T antenna groups, each antenna group including one or more antenna units or antenna ports having a same phase noise; transmitting, by the transmitter, D demodulation reference signals to the receiver; and transmitting, by the transmitter, M phase-tracking reference signals to the receiver, the M phase-tracking reference signals being adopted to track phase changes in the T antenna groups caused by one or more phase noise sources.
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公开(公告)号：US20190297560A1
公开(公告)日：2019-09-26
申请号：US16317829
申请日：2017-06-08
Inventor： Qiubin GAO , Runhua CHEN , Hui LI , Tamrakar RAKESH , Qiuping HUANG , Yu YANG , Yang SONG , Xin SU , Mengjun WANG , Chuanjun LI
Abstract: Disclosed are a method and apparatus for transmitting an initial access signal, thus solving the existing problem wherein transmitting and detecting of synchronization signals cannot be applied to large-scale network coverage of a future communication system. The method comprises: determining at least one to-be-transmitted identification information of a synchronization block, the synchronization block comprising at least two components for transmitting an initial access signal, and different components occupying different time-frequency resources of the synchronization block; determining an initial access signal transmitted by each component in the synchronization block according to the identification information; and determining a time-frequency resource occupied by each component in the synchronization block and transmitting the initial access signal of the component on the time-frequency resource occupied by each component.
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公开(公告)号：US20190229869A1
公开(公告)日：2019-07-25
申请号：US16337936
申请日：2017-09-27
Inventor： Hui LI , Runhua CHEN , Qiubin GAO , Tamrakar RAKESH , Qiuping HUANG
Abstract: Disclosed are a reference signal mapping method and device, used for realizing a CSI-RS mapping of 16 or more ports, so as to realize a CSI-RS transmission of 16 or more ports. The method comprises: according to an N port reference signal pattern, determining that a channel state information reference signal (CSI-RS) is mapped on a resource unit RE, N being an integer greater than 16, wherein, an RE position, having one N port CSI-RS of the N port reference signal pattern mapped thereto, is determined according to an RE position having a CSI-RS in a plurality of groups of 8 port reference signal patterns mapped thereto, each S port in the N port is multiplexed with S code words of 8 code words using an 8-bit orthogonal spreading code, and the 8 port reference signal pattern is an 8 port CSI-RS pattern defined by 3GPP Rel-13; and performing resource mapping on the CSI-RS according to the determined RE.
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公开(公告)号：US20180241449A1
公开(公告)日：2018-08-23
申请号：US15751460
申请日：2016-08-08
Inventor： Hui LI , Qiubin GAO , Runhua CHEN , Wenhong CHEN , Rakesh TAMRAKAR
CPC classification number: H04B7/0486 , H04B7/0473 , H04B7/0478 , H04B7/0617 , H04B7/0639
Abstract: A precoding matrix determination method and a precoding matrix determination device are provided. The precoding matrix determination method includes: dividing each of the groups of vertical-dimension beams into a plurality of subgroups of vertical-dimension beams, and dividing each of the groups of horizontal-dimension beams into a plurality of subgroups of horizontal-dimension beams; determining a first stage codebook in accordance with a Kronecker product of each subgroup of vertical-dimension beams acquired by dividing each of the groups of vertical-dimension beams and each subgroup of horizontal-dimension beams acquired by dividing each of the groups of horizontal-dimension beams; and selecting a plurality of columns of beams from the determined first stage codebook using a second stage codebook, and performing phase adjustment to determine a precoding matrix.
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35.发明申请公开(公告)号：US20180241445A1
公开(公告)日：2018-08-23
申请号：US15755090
申请日：2016-07-19
Inventor： Hui LI , Shanzhi CHEN , Qiubin GAO , Runhua CHEN , Wenhong CHEN , Tamrakar RAKESH
IPC: H04B7/0456 , H04B7/06
Abstract: Methods and apparatuses for transmitting coding indication information and determining a precoding matrix, for use in resolving the problem that the resolution of code words in a codebook generated by using a combination of a beam vector subgroup and column selection cannot be flexibly adjusted. The method comprises: determining first precoding indication information and second precoding indication information, the first precoding indication information corresponding to a first-stage precoding matrix, the second precoding indication information corresponding to a direction weighting vector and a phase adjustment factor, the direction weighting vector being used for performing interpolation processing on parts representing angles corresponding to beam vectors in the all beam vectors in each polarization direction in the first-stage precoding matrix, the phase adjusting factor being used for performing phase adjustment on different polarization directions of the first-stage precoding matrix, and the first-stage precoding matrix, the direction weighting vector, and the phase adjustment factor being used for generating a precoding matrix. The resolution of a precoding matrix is flexibly adjusted by using a direction weighting vector.
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Patent Agency Ranking
公开(公告)号：US20180167124A1
公开(公告)日：2018-06-14
申请号：US15579122
申请日：2016-05-23
Inventor： Runhua CHEN , Qiubin GAO , Tamrakar RAKESH
IPC: H04B7/06
CPC classification number: H04B7/0626 , H04B7/0632 , H04B7/0639 , H04W24/10 , H04W72/0413 , H04W88/02
Abstract: Disclosed are a channel state information feedback and a control method and device therefor, which are used for realizing large-scale CSI feedback under an antenna system, wherein a UE may only need to feedback some pieces of PMI information, so that the complexity of the UE feeding back CSI is reduced, and the flexibility for a network side to control the UE to feed back the CSI is better. The channel state information (CSI) feedback control method provided in the present application comprises: a base station determining that there is a need to control a user equipment (UE) to feed back CSI, the CSI at least comprising a first precoding matrix indicator (PMI) and a second PMI, the first PMI and the second PMI corresponding to the same precoding matrix; and the base station sending trigger signaling of CSI feedback to the UE, wherein indication information used for instructing whether the UE feeds back the first PMI and/or the second PMI is comprised.
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公开(公告)号：US20170373772A1
公开(公告)日：2017-12-28
申请号：US15539981
申请日：2015-12-09
Inventor： Qiubin GAO , Runhua CHEN , Wenhong CHEN , Hui LI , Rakesh TAMRAKAR
IPC: H04B17/318 , H04L25/02 , H04B7/0452
Abstract: The present disclosure provides a cell measurement method and a terminal. The cell measurement method includes steps of: measuring a pilot signal from a to-be-measured cell, so as to acquire an channel estimation of N pilot signal transmission ports of the to-be-measured cell, N≧1; determining an equivalent received power corresponding to each precoding matrix in accordance with each precoding matrix in a set of precoding matrices and the channel estimation of the N pilot signal transmission ports of the to-be-measured cell; and determining an equivalent received power of the to-be-measured cell in accordance with the equivalent received power corresponding to each precoding matrix.
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公开(公告)号：US20170244459A1
公开(公告)日：2017-08-24
申请号：US15521607
申请日：2015-09-21
Inventor： Runhua CHEN , Hui LI , Qiubin GAO
Abstract: A CSI feedback method, a CSI acquisition method, a CSI feedback device and a CSI acquisition device are provided, so as to reduce pilot resources configured for a UE and reduce the difficulty in processing CSI progresses at a UE side, thereby to facilitate the CSI feedback and acquisition and save resources. The CSI acquisition method includes steps of: determining beamforming array information in a first dimension; beamforming a pilot signal in a second dimension in accordance with the beamforming array information in the first dimension, and transmitting the beamformed pilot signal in the second dimension to a UE through a pilot resource in the second dimension; and receiving, from the UE, CSI in the second dimension obtained by measuring the pilot signal in the second dimension.
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公开(公告)号：US20210218456A1
公开(公告)日：2021-07-15
申请号：US16081878
申请日：2017-02-21
Inventor： Hui LI , Quibin GAO , Runhua CHEN , Wenhong CHEN , Rakesh TAMRAKAR
IPC: H04B7/06 , H04B7/0456
Abstract: A CSI feedback method and a CSI feedback device are provided. The CSI feedback method includes: determining a first precoding matrix in a set of first precoding matrices, and determining a first precoding matrix index value corresponding to the first precoding matrix; determining a second precoding matrix in a set of second precoding matrices, and determining a second precoding matrix index value corresponding to the second precoding matrix, the second precoding matrix including a beam selection section for selecting beams from the beam groups for each antenna group and a phase adjustment section for adjusting phases among the plurality of antenna groups; and feeding back the first precoding matrix index value and the second precoding matrix index value to an access device, so as to enable the access device to select corresponding precoding matrices from the set of first precoding matrices and the set of second precoding matrix in accordance with the first precoding matrix index value and the second precoding matrix index value, and implement calculation on the selected precoding matrices to obtain a precoding matrix for data transmission.
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40.发明申请公开(公告)号：US20210083724A1
公开(公告)日：2021-03-18
申请号：US16960876
申请日：2018-12-17
Inventor： Xin SU , Qiubin GAO , Tamraka Rakesh , Runhua CHEN
Abstract: The present application discloses an information indicating and determining method and apparatus, and a computer storage medium, being used for indicating QCL group information of a DMRS port, enabling a terminal to determine the QCL group information of the DMRS port. The embodiments of the present application provide an information indicating method, comprising: determining QCL group information of a demodulation reference signal DMRS port; and notifying a terminal of the QCL group information.
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