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    RADIO APPARATUS, CHANNEL ESTIMATION METHOD, NON-TRANSITORY COMPUTER READABLE MEDIUM, AND RADIO COMMUNICATION SYSTEM
    3.
    发明申请
    RADIO APPARATUS, CHANNEL ESTIMATION METHOD, NON-TRANSITORY COMPUTER READABLE MEDIUM, AND RADIO COMMUNICATION SYSTEM 有权

    公开(公告)号：US20210021446A1

    公开(公告)日：2021-01-21

    申请号：US17043308

    申请日：2019-01-30

    Applicant: NEC CORPORATION

    Inventor： Jun SHIKIDA ,  Kazushi MURAOKA ,  Naoto ISHII

    IPC: H04L25/02 ,  H04L27/26

    Abstract: A radio apparatus (10) includes an estimation unit (2) configured to calculate an estimated value of a channel response for each of a plurality of antennas, a padding unit (3) configured to generate a first antenna-space channel vector having dimensions larger than the number of the antennas by combining the estimated value with a padding value, a spatial transformation unit (4) configured to calculate a first beam-space channel vector by spatial transforming the first antenna-space channel vector, a noise suppression unit (5) configured to generate a second beam-space channel vector by suppressing at least one element of the first beam-space channel vector, an inverse spatial transformation unit (6) configured to calculate a second antenna-space channel vector by inversely and spatial transforming the second beam-space channel vector, and an extraction unit (7) configured to determine an estimated value of each channel based on the second antenna-space channel vector.

    DISCOVERY PERIOD CONFIGURATION FOR SMALL CELL ON/OFF
    4.
    发明申请
    DISCOVERY PERIOD CONFIGURATION FOR SMALL CELL ON/OFF 审中-公开
    发现小电池开/关的周期配置

    公开(公告)号：US20160295500A1

    公开(公告)日：2016-10-06

    申请号：US15023275

    申请日：2013-09-25

    Applicant: NEC CORPORATION

    Inventor： Le LIU ,  Naoto ISHII ,  Hisashi FUTAKI ,  Jun SHIKIDA

    IPC: H04W48/16 ,  H04W28/02

    CPC classification number: H04W48/16 ,  H04W28/0289 ,  H04W84/045

    Abstract: In one embodiment, an apparatus, a system or a network (1) sets a discovery period for a node (2B). The discovery period is a time period in which the node (2B) sends a signal (e.g., PSS, SSS, and CRS) necessary for cell detection and radio measurement performed by a user equipment (3A) before a cell (20B), controlled by the node (2B), is to be turned on in order to send a signal (e.g., data signal) for either or both of user data reception and transmission. It is achieved, for example, that the user equipment (3A) is able to detect the signal (e.g., PSS, SSS, and CRS) for cell detection and radio measurement in the discovery period by using legacy behavior of radio measurement.

    Abstract translation: 在一个实施例中，设备，系统或网络（1）设置节点（2B）的发现周期。 发现周期是节点（2B）在小区（20B）之前发送由用户设备（3A）执行的小区检测和无线电测量所需的信号（例如，PSS，SSS和CRS）的时间段，被控制 为了发送用户数据接收和发送中的任一个或两者的信号（例如，数据信号），由节点（2B）导通。 例如，通过使用无线电测量的遗留行为，用户设备（3A）能够在发现时段中检测用于小区检测和无线电测量的信号（例如，PSS，SSS和CRS）。

    RADIO APPARATUS, SIGNAL DETECTION METHOD, NON-TRANSITORY COMPUTER READABLE MEDIUM, AND RADIO COMMUNICATION SYSTEM
    6.
    发明申请
    RADIO APPARATUS, SIGNAL DETECTION METHOD, NON-TRANSITORY COMPUTER READABLE MEDIUM, AND RADIO COMMUNICATION SYSTEM 有权

    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.

    WIRELESS APPARATUS AND CHANNEL PREDICTION METHOD
    7.
    发明申请
    WIRELESS APPARATUS AND CHANNEL PREDICTION METHOD 有权

    公开(公告)号：US20210344524A1

    公开(公告)日：2021-11-04

    申请号：US16975294

    申请日：2019-03-08

    Applicant: NEC CORPORATION

    Inventor： Jun SHIKIDA ,  Kazushi MURAOKA ,  Naota ISHII

    IPC: H04L25/02

    Abstract: A wireless apparatus includes a channel estimation part that acquires an estimated impulse response which is an estimate value of an impulse response of a channel between a wireless terminal and the wireless apparatus, a tap location error detection part that detects a tap location error between estimated impulse responses at different time points out of the estimated impulse responses, and a channel prediction part that calculates a predicted impulse response which is an impulse response of the channel at a future time point by using the estimated impulse responses and the tap location error.

    METHOD AND DEVICE FOR ESTIMATING COMMUNICATION LOAD, RADIO STATION AND UPPER-LEVEL APPARATUS IN RADIO COMMUNICATION SYSTEM
    8.
    发明申请
    METHOD AND DEVICE FOR ESTIMATING COMMUNICATION LOAD, RADIO STATION AND UPPER-LEVEL APPARATUS IN RADIO COMMUNICATION SYSTEM 有权
    用于估计无线电通信系统中通信负载，无线电台和上位机的方法和装置

    公开(公告)号：US20160105815A1

    公开(公告)日：2016-04-14

    申请号：US14890981

    申请日：2014-05-12

    Applicant: NEC CORPORATION

    Inventor： Hiroto SUGAHARA ,  Jun SHIKIDA ,  Hiroaki AMINAKA ,  Toshifumi NAKAMURA

    IPC: H04W24/08 ,  H04L5/00 ,  H04L12/26

    CPC classification number: H04W24/08 ,  H04L5/006 ,  H04L43/0882 ,  H04W24/02

    Abstract: A method and a device for estimating a communication load, as well as a radio station and an upper-level apparatus in a radio communication system, are provided that can estimate a communication load in a target network with high accuracy by using received quality information. A communication load estimation function (1) for estimating a communication load in a network (NW) estimates the communication load in the network by using at least a first quality indicator (Q1), which is a quality measurement value including entire received power, and a second quality indicator (Q2), which is a quality measurement value including the signal-to-noise-and-interference ratio of a reference signal.

    Abstract translation: 提供了一种用于估计通信负载的方法和装置，以及无线电通信系统中的无线电台和上级装置，其可以通过使用接收的质量信息以高精度估计目标网络中的通信负载。 用于估计网络（NW）中的通信负载的通信负载估计功能（1）通过至少使用作为包括整个接收功率的质量测量值的第一质量指示符（Q1）来估计网络中的通信负载，以及 第二质量指示符（Q2），其是包括参考信号的信噪比干扰比的质量测量值。

    CONTROL APPARATUS, CONTROL METHOD, AND RECORDING MEDIUM
    9.
    发明公开
    CONTROL APPARATUS, CONTROL METHOD, AND RECORDING MEDIUM 审中-公开

    公开(公告)号：US20240348301A1

    公开(公告)日：2024-10-17

    申请号：US18631174

    申请日：2024-04-10

    Applicant: NEC Corporation

    Inventor： Jun SHIKIDA ,  Kazushi Muraoka

    IPC: H04B7/06 ,  H04W52/24

    CPC classification number: H04B7/0619 ,  H04W52/245

    Abstract: A control apparatus controls communication between a wireless terminal and a wireless apparatus. The control apparatus includes: a calculation unit that calculates a channel gain between the wireless terminal and the wireless apparatus when a beam is used, by using a reference signal transmitted by the wireless terminal using the beam; an estimation unit that estimates reception quality when the wireless terminal performs reception by using the beam, based on the channel gain and transmission power of the wireless apparatus; and an allocation unit that allocates at least one of a radio resource and a modulation and coding scheme to the wireless terminal, based on the reception quality.

    BASE STATION, METHOD FOR BASE STATION, AND COMPUTER READABLE MEDIUM
    10.
    发明公开
    BASE STATION, METHOD FOR BASE STATION, AND COMPUTER READABLE MEDIUM 审中-公开

    公开(公告)号：US20240106550A1

    公开(公告)日：2024-03-28

    申请号：US18222584

    申请日：2023-07-17

    Applicant: NEC Corporation

    Inventor： Takanobu DOI ,  Kazushi MURAOKA ,  Naoto ISHII ,  Jun SHIKIDA

    IPC: H04B17/21 ,  H04B17/336

    CPC classification number: H04B17/21 ,  H04B17/336

    Abstract: A base station, a method for a base station, and a program capable of appropriately selecting radio terminals for which spatial multiplexing is performed and an MCS, and thereby increasing throughput in multi-user MIMO are provided. A base station 11 according to the present disclosure includes: a correction parameter storage unit 1141 configured to store a plurality of correction parameters for each of a plurality of radio terminals 12, the plurality of correction parameters being provided for each of the radio terminals 12; a correction parameter selection unit 1131 configured to select a predetermined correction parameter from among the plurality of correction parameters based on a combination of radio terminals 12 that are spatially multiplexed in the same radio resource; a correction value calculation unit 1132 configured to calculate a correction value of the radio terminal 12 based on the predetermined correction parameter.

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