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公开(公告)号：US12057979B2
公开(公告)日：2024-08-06
申请号：US17597662
申请日：2019-07-18
Applicant: NTT DOCOMO, INC.
Inventor： Hiroki Harada , Satoshi Nagata , Wenjia Liu , Xiaolin Hou , Juan Liu
CPC classification number: H04L27/26025 , H04L1/0002 , H04L1/0014 , H04L27/2614
Abstract: A terminal determines a target code rate by using a reference code rate, which is based on a modulation scheme and a modulation order, and an adjustment coefficient α that lowers the reference code rate. The terminal transmits/receives a signal encoded based on the target code rate.
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公开(公告)号：US20240243960A1
公开(公告)日：2024-07-18
申请号：US18579750
申请日：2021-08-10
Applicant: NTT DOCOMO, INC.
Inventor： Juan Liu , Wenjia Liu , Xiaolin Hou , Anxin Li , Lan Chen , Yoshihisa Kishiyama , Takahiro Asai
CPC classification number: H04L27/2672 , H03M7/70 , H04L27/265
Abstract: The present disclosure provides an electronic device, including: an input unit configured to obtain a sequence to be compressed, wherein the sequence to be compressed has Q time-domain symbol elements, and Q is an integer greater than zero; a processing unit configured to perform a zero-padding operation on the sequence to be compressed according to at least a part of a compression factor to determine a zero-embedded sequence, perform a discrete Fourier transform spreading operation according to the zero-embedded sequence to determine a spread sequence, and perform at least one of a data deletion operation and a data superimposition operation based on the spread sequence to determine a compressed sequence, wherein the compressed sequence has M frequency-domain symbols, M is an integer greater than zero, and M is less than or equal to Q.
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公开(公告)号：US11552762B2
公开(公告)日：2023-01-10
申请号：US17257181
申请日：2018-08-10
Applicant: NTT DOCOMO, INC.
Inventor： Juan Liu , Wenjia Liu , Runxin Wang , Xin Wang , Xiaolin Hou
Abstract: Disclosed are a resource allocation method for demodulation reference signals and a base station. The resource allocation method for demodulation reference signals executed by the base station includes: determining an allocation method for a resource required for transmitting a plurality of demodulation reference signals and a parameter for generating the plurality of demodulation reference signals, the plurality of demodulation reference signals respectively corresponding to a plurality of user equipments, the allocation method being capable of supporting transmission of the plurality of demodulation reference signals on the same time domain resource, and the parameter being capable of making the demodulation reference signals sent with the same time frequency resource distinguished from each other; and transmitting information indicating the allocation method and information indicating the parameter to the plurality of user equipments.
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公开(公告)号：US20240340214A1
公开(公告)日：2024-10-10
申请号：US18568166
申请日：2021-07-15
Applicant: NTT DOCOMO, INC.
Inventor： Xiaojuan Wang , Jianxiong Pan , Neng Ye , Xiangming Li , Wenjia Liu , Juan Liu , Xiaolin Hou , Lan Chen , Yoshihisa Kishiyama
IPC: H04L27/38
CPC classification number: H04L27/38
Abstract: The present disclosure provides an electronic device and a modulation method. The electronic device includes: a receiving unit, which is configured to obtain a first input bit sequence; and a control unit, which is configured to perform pseudo N-order first type modulation on the first input bit sequence, wherein N first symbols that may be obtained by means of the pseudo N-order first type modulation are a portion of second symbols that may be obtained by means of M-order second type modulation, M and N are positive integers, and M is greater than N.
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公开(公告)号：US20230336394A1
公开(公告)日：2023-10-19
申请号：US18245786
申请日：2020-10-14
Applicant: NTT DOCOMO, INC.
Inventor： Juan Liu , Wenjia Liu , Xiaolin Hou
IPC: H04L27/26
CPC classification number: H04L27/2636 , H04L27/2614
Abstract: The present disclosure provides a spectrum shaping method for non-orthogonal waveforms and an electronic device. The electronic device includes: a processing unit configured to perform discrete Fourier transform spreading on data to be transmitted to obtain a spread signal, perform subcarrier mapping on the spread signal, perform spectrum shaping on subcarriers by using a spectrum shaping factor to obtain a shaped signal, and obtain a non-orthogonal Faster-Than-Nyquist signal according to the shaped signal; and a transmitting unit configured to transmit the non-orthogonal Faster-Than-Nyquist signal.
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Patent Agency Ranking
公开(公告)号：US20220173949A1
公开(公告)日：2022-06-02
申请号：US17602658
申请日：2019-05-10
Applicant: NTT DOCOMO, INC.
Inventor： Juan Liu , Wenjia Liu , Xin Wang , Xiaolin Hou , Anxin Li , Lan Chen
IPC: H04L27/26
Abstract: The present disclosure provides a terminal and a transmission method, the terminal including: a processing unit configured to perform Orthogonal Frequency Division Multiplexing (OFDM) processing on a first symbol sequence to obtain a second symbol sequence, and perform Faster than Nyquist (FTN) modulation on the second symbol sequence in time domain to obtain a third symbol sequence; and a transmitting unit configured to transmit the FTN-modulated third symbol sequence.
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公开(公告)号：US20230198820A1
公开(公告)日：2023-06-22
申请号：US17924892
申请日：2020-05-14
Applicant: NTT DOCOMO, INC.
Inventor： Naoya Shibaike , Hiroki Harada , Satoshi Nagata , Juan Liu , Wenjia Liu , Xiaolin Hou
IPC: H04L27/26
CPC classification number: H04L27/2607 , H04L27/2614
Abstract: A terminal transmits and receives a slot configured with a plurality of symbols. The terminal sets a length of a cyclic prefix added to each symbol based on a degree of compression of each symbol in time domain.
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公开(公告)号：US20220338231A1
公开(公告)日：2022-10-20
申请号：US17633042
申请日：2019-08-09
Applicant: NTT DOCOMO, INC.
Inventor： Hiroki Harada , Satoshi Nagata , Juan Liu , Wenjia Liu , Shaozhen Guo , Jing Wang , Xin Wang , Xiaolin Hou
Abstract: A terminal is disclosed including a receiving unit that receives a signal that is encoded by using transform precoding; and a controlling unit that assumes that size of transform precoding is determined based on a bandwidth of a downlink.
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公开(公告)号：US20210184808A1
公开(公告)日：2021-06-17
申请号：US17257181
申请日：2018-08-10
Applicant: NTT DOCOMO, INC.
Inventor： Juan Liu , Wenjia Liu , Runxin Wang , Xin Wang , Xiaolin Hou
Abstract: Disclosed are a resource allocation method for demodulation reference signals and a base station. The resource allocation method for demodulation reference signals executed by the base station includes: determining an allocation method for a resource required for transmitting a plurality of demodulation reference signals and a parameter for generating the plurality of demodulation reference signals, the plurality of demodulation reference signals respectively corresponding to a plurality of user equipments, the allocation method being capable of supporting transmission of the plurality of demodulation reference signals on the same time domain resource, and the parameter being capable of making the demodulation reference signals sent with the same time frequency resource distinguished from each other; and transmitting information indicating the allocation method and information indicating the parameter to the plurality of user equipments.
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公开(公告)号：US20250158868A1
公开(公告)日：2025-05-15
申请号：US18839369
申请日：2022-03-10
Applicant: NTT DOCOMO, INC.
Inventor： Juan Liu , Wenjia Lui , Xiaolin Hou , Lan Chen
IPC: H04L27/26
Abstract: The present disclosure provides an electronic device, including an input unit configured to obtain a first sequence including Q elements, the Q being an integer greater than 0; a control unit configured to perform a zero-padding operation and a discrete Fourier transformation spreading operation on the first sequence to determine an extension sequence, and perform a double-side data deletion operation based on the extension sequence to determine a second sequence, wherein the second sequence includes M elements, the M being an integer greater than 0.
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