-
公开(公告)号：US11140702B2
公开(公告)日：2021-10-05
申请号：US16358288
申请日：2019-03-19
Applicant: NEC Corporation
Inventor： Le Liu , Yoshikazu Kakura , Naoto Ishii , Takamichi Inoue
Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.
-
公开(公告)号：US20170251490A1
公开(公告)日：2017-08-31
申请号：US15459410
申请日：2017-03-15
Applicant: NEC Corporation
Inventor： Le LIU , Yoshikazu Kakura , Naoto Ishii , Takamichi Inoue
CPC classification number: H04W72/1273 , H04B7/024 , H04J11/0053 , H04L5/0035 , H04L5/0053 , H04W48/12 , H04W72/1205 , H04W72/1289 , H04W84/042
Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.
-
公开(公告)号：US12126364B2
公开(公告)日：2024-10-22
申请号：US17881152
申请日：2022-08-04
Applicant: NEC Corporation
Inventor： Masaaki Tanio , Naoto Ishii , Kazushi Muraoka
CPC classification number: H03M3/344 , H04B1/0475 , H03M3/43 , H03M3/458
Abstract: A delta-sigma modulation apparatus performs delta-sigma modulation on a first signal as an input signal and outputs a second signal, outputs, using the second signal and a third signal generated through a transmission process of the second signal, a fourth signal that is an approximated value of a signal which is generated through at least part of the transmission process, and performs the delta-sigma modulation on the first signal using the fourth signal and outputs the second signal.
-
14.发明公开公开(公告)号：US20230171131A1
公开(公告)日：2023-06-01
申请号：US17988951
申请日：2022-11-17
Applicant: NEC Corporation
Inventor： Kiyohiko Takahashi , Toshiki Takeuchi , Naoto Ishii
CPC classification number: H04L25/03019 , H04L27/265
Abstract: A signal detection unit detects, from a baseband signal of a received radio wave, two types of fixed signal sections that have different communication information and are present in sufficiently shorter time than a time period in which influence of fading fluctuates, and designate the detected two types of fixed signal sections as an information-1 section and an information-2 section. An information-1 section signal processing unit clips the information-1 section from the baseband signal, and performs Fourier transform on the clipped information-1 section. An information-2 section signal processing unit clips the information-2 section from the baseband signal, and performs Fourier transform on the clipped information-2 section. A feature value computation unit computes a feature value, based on an output of the information-1 section signal processing unit and an output of the information-2 section signal processing unit.
-
公开(公告)号：US11627485B2
公开(公告)日：2023-04-11
申请号：US17230202
申请日：2021-04-14
Applicant: NEC CORPORATION , OSAKA UNIVERSITY , THE DOSHISHA
Inventor： Kazushi Muraoka , Naoto Ishii , Takumi Takahashi , Shinsuke Ibi
Abstract: A computer system includes at least one memory and at least one processor coupled to the at least one memory and configured to execute one or more sets of instructions. The one or more sets of instructions, when executed by the at least one processor, cause the computer system to provide virtualized radio access network functions including executing a BP algorithm and provide controller functions including adjusting the total number of iterations of the BP algorithm depending on available computing resources of the computer system.
-
Patent Agency Ranking
公开(公告)号：US11595153B2
公开(公告)日：2023-02-28
申请号：US17673093
申请日：2022-02-16
Applicant: NEC CORPORATION , OSAKA UNIVERSITY , THE DOSHISHA
Inventor： Kazushi Muraoka , Takanobu Doi , Naoto Ishii , Takumi Takahashi , Seiichi Sampei , Shinsuke Ibi
IPC: H04L1/00 , H04B7/0452
Abstract: A method implemented in a computer system includes training a network, which is obtained by unfolding an iterative algorithm for demodulation or demodulation and decoding, using a machine learning technique with a loss function that takes into account non-Gaussianity of a log-likelihood ratio (LLR) distribution calculated from an output of the network. The method further includes producing a first set of learned parameters of that iterative algorithm.
-
公开(公告)号：US20220337341A1
公开(公告)日：2022-10-20
申请号：US17673093
申请日：2022-02-16
Applicant: NEC CORPORATION , OSAKA UNIVERSITY , THE DOSHISHA
Inventor： Kazushi MURAOKA , Takanobu Doi , Naoto Ishii , Takumi Takahashi , Seiichi Sampei , Shinsuke Ibi
IPC: H04L1/00 , H04B7/0452
Abstract: A method implemented in a computer system includes training a network, which is obtained by unfolding an iterative algorithm for demodulation or demodulation and decoding, using a machine learning technique with a loss function that takes into account non-Gaussianity of a log-likelihood ratio (LLR) distribution calculated from an output of the network. The method further includes producing a first set of learned parameters of that iterative algorithm.
-
公开(公告)号：US11452173B2
公开(公告)日：2022-09-20
申请号：US16652731
申请日：2017-10-04
Applicant: NEC Corporation
Inventor： Dileep Kumar , Kazushi Muraoka , Naoto Ishii
Abstract: Provided a Remote Radio Head (RRH) with multiple antennas generating a plurality of analog beams in a wireless communication system serving at least one user terminal, including a metric calculator that calculates at least one metric representing a traffic demand as a function of spatial direction by using at least a signal of each Radio Frequency chain and a beam former that generates analog beams directed towards a spatial direction determined based on the calculated at least one metric.
-
公开(公告)号：US11309991B2
公开(公告)日：2022-04-19
申请号：US17230323
申请日：2021-04-14
Applicant: NEC CORPORATION , OSAKA UNIVERSITY , THE DOSHISHA
Inventor： Kazushi Muraoka , Naoto Ishii , Takumi Takahashi , Seiichi Sampei , Shinsuke Ibi
Abstract: A BP detector of a wireless receiver apparatus reads a first parameter set or a second parameter set. The first parameter set includes a plurality of scaling factors and a plurality of damping factors learned together using a deep learning technique. The second parameter set includes a plurality of scaling factors and a plurality of node selection factors learned together using a deep learning technique from a memory. The BP detector executes an iterative BP algorithm that uses the first parameter set or the second parameter set in order to perform multi-user detection.
-
公开(公告)号：US20210321284A1
公开(公告)日：2021-10-14
申请号：US17230202
申请日：2021-04-14
Applicant: NEC CORPORATION , OSAKA UNIVERSITY , THE DOSHISHA
Inventor： Kazushi Muraoka , Naoto Ishii , Takumi Takahashi , Shinsuke Ibi
Abstract: A computer system includes at least one memory and at least one processor coupled to the at least one memory and configured to execute one or more sets of instructions. The one or more sets of instructions, when executed by the at least one processor, cause the computer system to provide virtualized radio access network functions including executing a BP algorithm and provide controller functions including adjusting the total number of iterations of the BP algorithm depending on available computing resources of the computer system.
-
-
-
-
-
-
-
-
-
Search Results
33
records
(took 0.021 seconds)
