公开(公告)号：EP1717968A4

公开(公告)日：2015-06-17

申请号：EP05719071

申请日：2005-02-14

申请人： NEC CORP ,  FUJITSU LTD ,  NTT DOCOMO INC

发明人： ITO TAKUMI ,  YOSHIDA SHOUSEI ,  KAKURA YOSHIKAZU ,  SEKI HIROYUKI ,  KAWAI HIROYUKI ,  HIGUCHI KENICHI ,  SAWAHASHI MAMORU

IPC分类号： H04B7/08 ,  H04B7/04 ,  H04J99/00 ,  H04L1/06

CPC分类号： H04L1/06 ,  H04B7/0854

摘要： It is an object to provide a receiving apparatus which is capable of demodulating signals with a very simple arrangement. Receiving apparatus 1 has N reception antennas 11-1 - 11-N, and reception antennas 11-1 - 11-N receive signals. Channel coefficient estimator 12 estimates and outputs channel coefficients from the signals received by respective reception antennas 11-1 - 11-N. QR decomposer 13 is supplied with a channel matrix having the channel coefficients as its elements, performs QR decomposition on the channel matrix, and outputs a Q matrix and an R matrix. A Q H processor 14 is supplied with the Q matrix and the received signals, multiplies the received signals by a complex conjugate transposed matrix of the Q matrix, and outputs converted signal z. A transmitted sequence estimator 15 is supplied with converted signal z and the R matrix and estimates transmitted sequences.

公开(公告)号：EP1617583A4

公开(公告)日：2011-06-01

申请号：EP04729507

申请日：2004-04-26

申请人： NEC CORP ,  NTT DOCOMO INC

发明人： KAKURA YOSHIKAZU ,  YOSHIDA SHOUSEI ,  ATARASHI HIROYUKI ,  MAEDA NORIYUKI

IPC分类号： H04J11/00 ,  H04B1/692 ,  H04B1/707 ,  H04J13/00 ,  H04J13/18 ,  H04L5/02 ,  H04L27/26 ,  H04W76/02 ,  H04W88/02

CPC分类号： H04L5/026 ,  H04J11/0036 ,  H04J13/004 ,  H04L27/2613

摘要： A radio transmitter-receiver wherein a pilot symbol is used in the transmitter that has undergone M-chip spreading on the frequency axis and N-chip spreading on the time axis by a spreading code of M×N chip length (where M and N are any integers equal to or greater than 2), and in the receiver, a spreading code that is not used in spreading said pilot signal is used as a despreading code to despread a received signal and then estimate noise and interference power. The spreading code that is used to spread the pilot symbol and the despreading code that is used in despreading are assigned so as to be orthogonal even if only in N chips on the time axis.

公开(公告)号：EP1624603A4

公开(公告)日：2011-08-10

申请号：EP04729523

申请日：2004-04-26

申请人： NEC CORP ,  NTT DOCOMO INC

发明人： KAKURA YOSHIKAZU ,  ATARASHI HIROYUKI ,  MAEDA NORIYUKI

IPC分类号： H04W16/02 ,  H04B1/707 ,  H04B1/711 ,  H04L25/02 ,  H04W72/04 ,  H04W88/02 ,  H04W88/08

CPC分类号： H04L25/0224

公开(公告)号：EP2811777A4

公开(公告)日：2015-09-16

申请号：EP13743597

申请日：2013-01-24

申请人： NEC CORP

发明人： INOUE TAKAMICHI ,  HAMABE KOJIRO ,  KAKURA YOSHIKAZU ,  ISHII NAOTO ,  LIU LE

IPC分类号： H04B7/02 ,  H04B7/06 ,  H04L5/00 ,  H04W24/10 ,  H04W28/16

CPC分类号： H04W24/10 ,  H04B7/024 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0639 ,  H04L5/0035 ,  H04L5/0053 ,  H04L5/0057

公开(公告)号：EP1919227A4

公开(公告)日：2013-09-04

申请号：EP06782873

申请日：2006-08-22

申请人： NEC CORP

发明人： KOYANAGI KENJI ,  KAKURA YOSHIKAZU ,  LEE JINSOCK ,  KURODA NAHOKO

IPC分类号： H04W36/30 ,  H04W56/00

CPC分类号： H04W36/0005 ,  H04W36/30 ,  H04W56/001 ,  H04W56/0045

公开(公告)号：EP3349520A4

公开(公告)日：2018-07-18

申请号：EP09722187

申请日：2009-03-18

申请人： NEC CORP

发明人： INOUE TAKAMICHI ,  KOYANAGI KENJI ,  LIU LE ,  KAKURA YOSHIKAZU

IPC分类号： H04W72/04 ,  H04J1/00 ,  H04J11/00 ,  H04W72/08

CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0041 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0057 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0094 ,  H04L27/2614 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W88/02 ,  H04W88/08

摘要： The problem is that, in a mobile wireless system, when more than one frequency block composed of resource blocks that are consecutive on a frequency axis is assigned to one mobile station, the multi-diversity effect due to scheduling increases by the number of assigned frequency blocks being increased, but the overhead caused by the scheduling information increases. Accordingly, there is a tradeoff between the multi-diversity effect and the scheduling overhead. However, when the aforementioned tradeoff was considered with OFDM and SC-FDMA, the same fixed number of frequency blocks would have been used for all mobile stations. Accordingly, an optimization that takes into account the tradeoff between the multi-diversity effect and scheduling overhead has not been sufficiently achieved. In a wireless communication system, the maximum frequency block number, which is the maximum number of the aforementioned frequency blocks assigned to the same mobile station, is set based on system information, which is information pertaining to the base station installation environment and the mobile station or the mobile station's communication status, and the base station assigns no more resource blocks than the aforementioned maximum frequency block number.

公开(公告)号：EP2625883A4

公开(公告)日：2017-08-30

申请号：EP10858086

申请日：2010-10-07

申请人： NEC CORP

发明人： LIU LE ,  INOUE TAKAMICHI ,  KAKURA YOSHIKAZU

IPC分类号： H04W28/16 ,  H04W72/04 ,  H04W72/12 ,  H04W92/20

CPC分类号： H04W72/04 ,  H04W28/16 ,  H04W72/12 ,  H04W92/20

公开(公告)号：EP2418793A4

公开(公告)日：2017-03-29

申请号：EP10761580

申请日：2010-03-19

申请人： NEC CORP

发明人： INOUE TAKAMICHI ,  KOYANAGI KENJI ,  KAKURA YOSHIKAZU

IPC分类号： H04J11/00 ,  H04J13/00 ,  H04L27/26 ,  H04W72/04

CPC分类号： H04J13/0059 ,  H04J13/22 ,  H04L25/022 ,  H04L25/03159 ,  H04L27/261 ,  H04L27/2614 ,  H04L27/2636 ,  H04W72/00

摘要： Provided is a wireless communication technique capable of supporting communication using a single component carrier, and communication using a plurality of component carriers. The communication using the plurality of carriers is characterized by using a different signal sequence in each of the carriers, and using the signal sequences as reference signals.

公开(公告)号：EP2187667A4

公开(公告)日：2014-01-08

申请号：EP08792153

申请日：2008-08-04

申请人： NEC CORP

发明人： KAKURA YOSHIKAZU

IPC分类号： H04W72/04 ,  H04L1/18

CPC分类号： H04W72/042

摘要： A communication system comprises a base station and a mobile station. The base station has resource allocating means for associating basic resources which are M unit resources (M is two or more integer) of a first control channel through which first control information is transmitted with the resources of a second control channel through which second control information is transmitted, allocating at least a part of the basic resources to the first control information, and associating the first control information with the resources of the second control channel corresponding to one of the basic resources allocated to the first control information and first control information transmitting means for transmitting the allocated first control information to the mobile station. The mobile station has second control information transmitting means for receiving the first control information and transmitting second control information by using the resources of the second control channel associated with the first control information.

摘要翻译： 通信系统包括基站和移动台。 基站具有用于将作为第一控制信道的第一控制信道的M个单元资源（M为2个以上的整数）的基本资源与第2控制信道的资源相关联的资源分配单元， 将所述基本资源的至少一部分分配给所述第一控制信息，以及将所述第一控制信息与对应于分配给所述第一控制信息的基本资源之一的所述第二控制信道的资源和所述第一控制信息发送装置 用于将分配的第一控制信息发送到移动台。 移动站具有第二控制信息发送装置，用于通过使用与第一控制信息相关联的第二控制信道的资源来接收第一控制信息并发送第二控制信息。

公开(公告)号：EP2953282A4

公开(公告)日：2016-08-10

申请号：EP14746286

申请日：2014-01-27

申请人： NEC CORP

发明人： TAJIMA SHINICHI ,  ISHII NAOTO ,  KAKURA YOSHIKAZU

IPC分类号： H04B7/06 ,  H04B7/04

CPC分类号： H04B7/0456 ,  H04B7/0478 ,  H04B7/0617 ,  H04B7/0639 ,  H04B7/086 ,  H04W88/02 ,  H04W88/08

摘要： A communication system, a terminal apparatus, a base station apparatus, and a method for sharing a codebook are provided that make it possible to improve system capacity by using precoding according to a cell environment. In a communication system in which beam directivity control is performed by precoding using a codebook that is common between a base station (10) and a terminal (20), the base station (10) notifies the terminal (20) information for codebook determination k including cell (11)-specific information on the base station, and the base station (10) and the terminal (20) generate the common codebook based on the information for codebook determination.

摘要翻译： 提供一种通信系统，终端装置，基站装置以及用于共享码本的方法，能够通过使用根据小区环境的预编码来提高系统容量。 在通过使用基站（10）和终端（20）之间公共的码本进行预编码来进行波束方向性控制的通信系统中，基站（10）向终端（20）通知码本确定k 包括基站上的小区（11）特定信息，并且基站（10）和终端（20）基于用于码本确定的信息生成公共码本。