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公开(公告)号：US20240276494A1
公开(公告)日：2024-08-15
申请号：US18643388
申请日：2024-04-23
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 , H04W72/12 , H04W72/23 , 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.
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公开(公告)号：US20170078074A1
公开(公告)日：2017-03-16
申请号：US15363529
申请日：2016-11-29
Applicant: NEC Corporation
Inventor： Le LIU , Takamichi INOUE , Naoto ISHII , Yoshikazu KAKURA
CPC classification number: H04L5/0057 , H04B7/024 , H04B17/24 , H04B17/309 , H04B17/345 , H04L5/0035 , H04L5/0048 , H04W24/08 , H04W72/042 , H04W72/082
Abstract: A radio communication system includes a network and a user terminal, wherein the network includes a plurality of radio stations and a controller which controls the plurality of radio stations, wherein at least two of the plurality of radio stations communicate with the user terminal, wherein the controller notifies the user terminal of information about resource for interference measurement, wherein the user terminal calculates and reports channel quality information based on the information.
Abstract translation: 无线通信系统包括网络和用户终端，其中所述网络包括多个无线电站和控制所述多个无线电台的控制器，其中所述多个无线电站中的至少两个与所述用户终端通信，其中， 控制器向用户终端通知有关干扰测量用资源的信息，其中，用户终端基于该信息计算并报告信道质量信息。
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3.发明公开公开(公告)号：US20240235692A1
公开(公告)日：2024-07-11
申请号：US18563461
申请日：2021-05-28
Applicant: NEC Corporation
IPC: H04B10/61
CPC classification number: H04B10/61
Abstract: A training apparatus (2000) acquire a first transmission symbol sequence and a second transmission symbol sequence. The first transmission symbol sequence is input to an optical transmission unit (112), and converted into an optical transmission signal. The second transmission symbol sequence is acquired by demodulating the optical transmission signal. The training apparatus (2000) executes a training of a set of a generator (200) and a discriminator (300) using a training dataset (10) that is generated based on the first and second transmission symbol sequence. The generator (200) is trained so as to generate a data that is determined as being the ground truth data by the discriminator (300). The discriminator (300) is trained so as to distinguish the ground truth data and the data generated by the generator (200). The training apparatus (2000) outputs parameter information (20) that includes trainable parameters of the generator (200).
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公开(公告)号：US20210320750A1
公开(公告)日：2021-10-14
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.
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公开(公告)号：US20180324004A1
公开(公告)日：2018-11-08
申请号：US15771544
申请日：2016-10-28
Applicant: NEC Corporation
Inventor： Jun SHIKIDA , Naoto ISHII
CPC classification number: H04L25/0224 , H04B7/0452 , H04J11/00 , H04J11/0023 , H04L1/0003 , H04W16/28 , H04W72/10 , H04W72/12 , H04W88/08
Abstract: A radio apparatus is provided with: a channel estimation part that estimates a channel response between a radio terminal and the radio apparatus; a channel information generation part that generates channel information from the estimated channel response; and a transmission part that transmits the generated channel information to a control apparatus.
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Patent Agency Ranking
公开(公告)号：US20170163457A1
公开(公告)日：2017-06-08
申请号：US15321624
申请日：2015-02-24
Applicant: NEC Corporation
Inventor： Yasunori FUTATSUGI , Naoto ISHII
CPC classification number: H04L27/2607 , H04B1/16 , H04L5/0007 , H04L25/0307 , H04L27/2665 , H04L27/2666
Abstract: The object of the present invention is to reduce the number of complex multiplications in an ICI reduction processing and to reduce the influence of characteristic degradation due to a quantization bit limitation of a digital signal processing. A receiver includes an extended CP addition unit (102) that receives radio signals through a plurality of paths and compensates for a symbol lost within a Fourier transform window to received signals received through the plurality of paths; and FFTs (104-1 and 104-2) each of which performs, in a range of the Fourier transform window, Fourier transform on the received signal with a lost symbol added.
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7.发明申请公开(公告)号：US20240397351A1
公开(公告)日：2024-11-28
申请号：US18665819
申请日：2024-05-16
Applicant: NEC Corporation
Inventor： Naoto ISHII , Toshiki TAKEUCHI , Daisaku OGASAHARA
IPC: H04W24/06 , H04B10/073 , H04Q11/00 , H04W88/08
Abstract: A wireless control unit transmits to a plurality of analog sections a control signal for performing control so as to cause the plurality of analog sections to transition to a loopback mode, transmits to the plurality of analog sections an observation signal for observing delay times, calculates, for each of the plurality of analog sections, a path delay based on the number of clocks generated from when the observation signal is transmitted to when the observation signal is received, and transmits to the plurality of analog sections a control signal for canceling the loopback mode of the plurality of analog sections. In addition, the wireless control unit transmits a downlink signal at a timing calculated for each of the plurality of analog sections according to the path delay.
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公开(公告)号：US20230054311A1
公开(公告)日：2023-02-23
申请号：US17881152
申请日：2022-08-04
Applicant: NEC Corporation
Inventor： Masaaki TANIO , Naoto ISHII , Kazushi MURAOKA
IPC: H03M3/00
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.
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公开(公告)号：US20220345163A1
公开(公告)日：2022-10-27
申请号：US17641187
申请日：2020-09-02
Applicant: NEC Corporation
Inventor： Masaaki TANIO , Norifumi KAMIYA , Naoto ISHII
Abstract: A parameter determination apparatus (2) includes: a first learning device (2111) learning a weight between a [j−1]-th layer (j is an integer that satisfies a condition that “2≤j≤the number of the layer”) and a [j]-th layer to which an output of the [j−1]-th layer is inputted among a plurality of layers of a neural network; a selecting device (2112) selecting at least one valid path for each node included in the [j]-th layer from a plurality of connection paths that connect nodes in the [j−1]-th layer and nodes in the [j]-th layer, respectively, on the basis of the weight learned by the first learning device; and a second learning device (2113) learning at least one of the weight and a bias as the parameters relating to a network structure between the [j−1]-th layer and the [j]-th layer on the basis of the sample signal, the label signal and the valid path.
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公开(公告)号：US20210384930A1
公开(公告)日：2021-12-09
申请号：US17282469
申请日：2019-08-27
Applicant: NEC Corporation
Inventor： Jun SHIKIDA , Naoto ISHII
IPC: H04B1/10 , H04B7/0456 , H04B7/06 , H04B7/10 , H04L25/02
Abstract: A radio apparatus capable of reducing the amount of calculation required to suppress an interference signal is provided. A radio apparatus (1) includes a spatial transformation unit (2) configured to perform a spatial transformation on a received signal including a desired signal and an interference signal received by a plurality of antennas, and thereby calculate a first beam-space received signal vector, a beam selecting unit (3) configured to select at least two elements from the first beam-space received signal vector and generate a second beam-space received signal vector, and an interference suppression synthesis unit (4) configured to estimate a covariance matrix of an interference noise signal including a noise signal and the interference signal included in the second beam-space received signal vector, generate a reception weight by using this covariance matrix, and detect the desired signal based on the reception weight and the second beam-space received signal vector.
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