公开(公告)号：EP2541823A1

公开(公告)日：2013-01-02

申请号：EP11747460.1

申请日：2011-02-24

申请人： Nippon Telegraph And Telephone Corporation

发明人： ISHIHARA Koichi ,  TAKATORI Yasushi ,  ASAI Yusuke ,  KUDO Riichi ,  JIANG Wenjie ,  YAMADA Tomoyuki ,  MIZOGUCHI Masato

IPC分类号： H04J99/00 ,  H04B1/40 ,  H04B7/04 ,  H04B7/10 ,  H04J1/00

CPC分类号： H04B7/0691 ,  H04B7/0452 ,  H04B7/0834 ,  H04B7/0874 ,  H04B7/0877 ,  H04B7/10

摘要： A spatial multiplexing wireless transmission system is formed by a base station, and by a plurality of terminal stations that are provided with a plurality of antennas. The base station is provided with an information signal generating portion, a control signal generating portion, a transmission frame generating portion, a multiple beamforming portion, a transmission/reception switching portion, a reception signal processing portion, a propagation environment estimating portion, and an antenna information generating portion. At least one of the terminal stations is provided with a transmission/reception switching portion, a reception signal processing portion, a decoding portion, an antenna information extracting portion, an antenna information generating portion, an transmitting portion, a battery, a remaining battery detecting portion, a transmission request extracting portion, and a propagation environment estimating portion.

摘要翻译： 空间复用的无线传输系统由一个基站形成，并且通过终端台的多个并设置有天线的多元性。 基站被在信息信号生成部，控制信号生成部，发送帧生成部，多波束形成部，发送/接收切换部，接收信号处理部分，一个传播环境设置有估计部，并且在 天线信息生成部。 终端站中的至少一个设置有发送/接收切换部，接收信号处理部分，一个解码部分到天线信息提取部，到天线信息生成部，以部分发射，电池的剩余电池检测 在部分的发送请求中提取的部分，并且传播环境估计部。

公开(公告)号：EP2642781B1

公开(公告)日：2019-10-30

申请号：EP11842236.9

申请日：2011-11-15

申请人： Nippon Telegraph And Telephone Corporation

发明人： KUDO Riichi ,  MATSUI Munehiro ,  MURAKAMI Tomoki ,  ICHIKAWA Takeo ,  ASAI Yusuke ,  ISHIHARA Koichi ,  YAMADA Tomoyuki ,  MIZOGUCHI Masato

IPC分类号： H04B7/0452 ,  H04B7/06 ,  H04L5/00 ,  H04W16/28 ,  H04W24/10 ,  H04B17/318

公开(公告)号：EP2942917B1

公开(公告)日：2018-05-23

申请号：EP14752142.1

申请日：2014-02-13

申请人： Nippon Telegraph and Telephone Corporation

发明人： YOSHIDA Mitsuteru ,  YAMAZAKI Etsushi ,  OKAMOTO Seiji ,  UZAWA Hiroyuki ,  HORIKOSHI Kengo ,  ISHIHARA Koichi ,  KOBAYASHI Takayuki ,  KISAKA Yoshiaki ,  TOMIZAWA Masahito ,  FUJIWARA Naoki ,  KATAOKA Tomoyoshi ,  YONENAGA Kazushige

IPC分类号： H04L27/38 ,  H04B10/2507 ,  H04B10/61

CPC分类号： H04B10/6165 ,  H04B10/2507 ,  H04B10/516 ,  H04B10/61 ,  H04J14/06 ,  H04L27/38 ,  H04L2027/0067 ,  H04L2027/0095

摘要： An increase in circuit scale is suppressed and a phase variation caused in a transmission path or the like is compensated for. An optical transmission system includes: a pilot symbol detection unit which detects a plurality of pilot symbols intermittently inserted into a received complex electric field signal that is obtained through coherent detection for a received optical signal; an error signal computation unit which calculates a complex electric field error signal indicating a phase variation at each pilot symbol based on the pilot symbols detected by the pilot symbol detection unit and a predetermined reference symbol; a compensation electric field signal generation unit which estimates a phase variation between the pilot symbols in the received complex electric field signal using filter processing based on the complex electric field error signal calculated by the error signal computation unit; and a phase noise compensation unit which performs phase compensation for the received complex electric field signal based on the phase variation between the pilot symbols estimated by the compensation electric field signal generation unit.

公开(公告)号：EP2930864B1

公开(公告)日：2017-08-16

申请号：EP14740258.0

申请日：2014-01-15

申请人： Nippon Telegraph and Telephone Corporation

发明人： ISHIHARA Koichi ,  MIZOGUCHI Masato ,  MURAKAMI Tomoki ,  KATAOKA Tomoyoshi ,  KISAKA Yoshiaki ,  NAKAGAWA Tadao ,  YAMAZAKI Etsushi ,  OKAMOTO Seiji ,  HORIKOSHI Kengo ,  TOMIZAWA Masahito ,  KUDO Riichi

IPC分类号： H04B10/61 ,  H04B10/2513 ,  H04J3/14 ,  H04B10/69

CPC分类号： H04J14/08 ,  H04B10/0775 ,  H04B10/2513 ,  H04B10/25133 ,  H04B10/516 ,  H04B10/61 ,  H04B10/6161 ,  H04B10/697 ,  H04B2210/072 ,  H04J3/14

公开(公告)号：EP2290837B1

公开(公告)日：2016-09-21

申请号：EP09766726.5

申请日：2009-06-19

申请人： Nippon Telegraph And Telephone Corporation

发明人： ISHIHARA Koichi ,  KOBAYASHI Takayuki ,  KUDO Riichi ,  TAKATORI Yasushi ,  MATSUI Munehiro ,  MIZOGUCHI Masato ,  SANO Akihide ,  YAMADA Eiichi ,  YAMAZAKI Etsushi ,  MIYAMOTO Yutaka ,  NOSAKA Hideyuki

IPC分类号： H04B7/08 ,  H04J11/00 ,  H04L27/00

CPC分类号： H04B7/084 ,  H04B7/0845 ,  H04L2027/0067

公开(公告)号：EP2930867A1

公开(公告)日：2015-10-14

申请号：EP14742856.9

申请日：2014-01-24

申请人： Nippon Telegraph and Telephone Corporation

发明人： HORIKOSHI Kengo ,  SHIBAHARA Kohki ,  YAMAZAKI Etsushi ,  YOSHIDA Mitsuteru ,  ISHIHARA Koichi ,  KOBAYASHI Takayuki ,  KISAKA Yoshiaki ,  OHARA Takuya ,  TOMIZAWA Masahito ,  KATAOKA Tomoyoshi

IPC分类号： H04B10/61

CPC分类号： H04B10/6165 ,  H04L7/0041 ,  H04L7/0075 ,  H04L27/066 ,  H04L27/389

摘要： An optical receiving device receives an optical signal that has been modulated by means of phase modulation or quadrature amplitude modulation, converts the received optical signal into an electrical signal using coherent detection, and performs phase compensation on the converted received signal, and includes: a carrier phase estimation unit that estimates carrier phase errors in a received symbol string obtained from the received signal; a gain adjustment unit that performs gain adjustment on symbols input into the carrier phase adjustment unit; a phase cycle slip reduction unit that, by performing statistical processing on an output from the carrier phase estimation unit, detects general noise that causes a phase cycle slip, and reduces the phase cycle slip; and a phase compensation circuit that compensates carrier phase errors contained in the received signal using an output from the carrier phase estimation unit.

公开(公告)号：EP2541823B1

公开(公告)日：2014-12-10

申请号：EP11747460.1

申请日：2011-02-24

申请人： Nippon Telegraph And Telephone Corporation

发明人： ISHIHARA Koichi ,  TAKATORI Yasushi ,  ASAI Yusuke ,  KUDO Riichi ,  JIANG Wenjie ,  YAMADA Tomoyuki ,  MIZOGUCHI Masato

IPC分类号： H04J99/00 ,  H04B1/40 ,  H04J1/00 ,  H04B7/08 ,  H04B7/06 ,  H04B7/04 ,  H04B7/10 ,  H04W52/02

CPC分类号： H04B7/0691 ,  H04B7/0452 ,  H04B7/0834 ,  H04B7/0874 ,  H04B7/0877 ,  H04B7/10

公开(公告)号：EP2725731A1

公开(公告)日：2014-04-30

申请号：EP12831376.4

申请日：2012-09-18

申请人： Nippon Telegraph And Telephone Corporation

发明人： KUDO Riichi ,  MURAKAMI Tomoki ,  ISHIHARA Koichi ,  ICHIKAWA Takeo ,  ASAI Yusuke ,  KUMAGAI Tomoaki ,  MIZOGUCHI Masato

IPC分类号： H04J99/00 ,  H04B7/04

CPC分类号： H04B7/0417 ,  H04B7/0452 ,  H04B7/0634 ,  H04L25/0204 ,  H04L25/0226

摘要： The number of training signals for channel estimation is reduced. A wireless communication method includes: a step of reading, by an access point apparatus, stored training weights for a station which performs channel estimation; a step of generating, by the access point apparatus, a weight training symbol by multiplying the training weights by a training symbol and transmitting the generated weight training symbol; a step of estimating, by a station apparatus, weight channel information from the received weight training symbol; a step of transmitting, by the station apparatus, the weight channel information to the access point apparatus; a step of calculating, by the access point apparatus, transmission weights using the received weight channel information and the stored training weights; a step of transmitting, by the access point apparatus, a data signal in accordance with the transmission weights; and a step of calculating and storing, by the access point apparatus, new training weights using the weight channel information and the stored training weights.

摘要翻译： 用于信道估计的训练信号的数量减少。 无线通信方法包括：由接入点装置读取进行信道估计的站的存储训练权重的步骤; 由接入点设备通过将训练权重乘以训练符号并发送生成的权重训练符号来生成加权训练符号; 通过站装置估计来自所接收的权重训练符号的权重信道信息的步骤; 由所述站装置向所述接入点装置发送权重信道信息的步骤; 由接入点装置使用所接收的加权信道信息和存储的训练权重来计算发送权重的步骤; 由接入点装置根据发送权重发送数据信号的步骤; 以及由接入点装置使用权重信道信息和存储的训练权重来计算和存储新的训练权重的步骤。

公开(公告)号：EP2456107A1

公开(公告)日：2012-05-23

申请号：EP10799887.4

申请日：2010-07-15

申请人： Nippon Telegraph and Telephone Corporation

发明人： KUDO Riichi ,  KOBAYASHI Takayuki ,  ISHIHARA Koichi ,  TAKATORI Yasushi ,  NOSAKA Hideyuki ,  MATSUI Munehiro ,  MIZOGUCHI Masato ,  NAKAGAWA Tadao ,  YAMAZAKI Etsushi ,  SANO Akihide ,  MIYAMOTO Yutaka ,  YOSHIDA Eiji

IPC分类号： H04J11/00

CPC分类号： H04L27/2672 ,  H04L25/03159 ,  H04L27/2633 ,  H04L27/265 ,  H04L27/266 ,  H04L2025/03414

摘要： A frequency domain multiplexed signal receiving method which decodes received signals that are multiplexed in a frequency domain, includes: a digital signal acquisition step of acquiring digital signals from the received signals that are multiplexed in the frequency domain; an offset discrete Fourier transform step of applying an offset discrete Fourier transform to odd discrete point numbers based on the acquired digital signals; and a decode step of decoding frequency domain digital signals in the frequency domain obtained by the offset discrete Fourier transform, and that are the frequency domain digital signals of one or more frequency channels.

摘要翻译： 其解码所接收的信号并在频域复用的频域复用的信号接收方法，包括：从接收到的信号中获取数字信号的数字信号获取的步骤并在频域复用; 以抵消离散傅里叶变换施加于偏移离散傅立叶变换为离散基于所获取的数字信号奇点号码的步骤; 和解码的频域数字信号的在由偏移离散傅立叶获得的频域中的解码步骤变换，并做是一个或多个频率信道的频域数字信号。

公开(公告)号：EP2290837A1

公开(公告)日：2011-03-02

申请号：EP09766726.5

申请日：2009-06-19

申请人： Nippon Telegraph And Telephone Corporation

发明人： ISHIHARA Koichi ,  KOBAYASHI Takayuki ,  KUDO Riichi ,  TAKATORI Yasushi ,  MATSUI Munehiro ,  MIZOGUCHI Masato ,  SANO Akihide ,  YAMADA Eiichi ,  YAMAZAKI Etsushi ,  MIYAMOTO Yutaka ,  NOSAKA Hideyuki

IPC分类号： H04B7/08 ,  H04J11/00

CPC分类号： H04B7/084 ,  H04B7/0845 ,  H04L2027/0067

摘要： A receiver device receives a signal inputted to one or a plurality of ports as a plurality of received signals, and includes: a phase offset estimating unit that, on the basis of a unique word of each signal block contained in said received signal, estimates the phase offset, and a phase offset compensating unit that, on the basis of a phase offset estimated by said phase offset estimating unit, compensates the phase offset; the receiver device uses a known signal component (unique word) contained in a frequency-domain equalized signal to compensate the phase offset, whereby it compensates complex phase offset fluctuation, and estimates the phase offset of a signal obtained at each port.

摘要翻译： 接收机装置接收输入到一个或多个端口的信号作为多个接收信号，并且包括：相位偏移估计单元，其基于包含在所述接收信号中的每个信号块的唯一字，估计 以及相位偏移补偿单元，其基于由所述相位偏移估计单元估计的相位偏移补偿相位偏移; 接收机设备使用包含在频域均衡信号中的已知信号分量（唯一字）来补偿相位偏移，从而补偿复相位偏移波动，并且估计在每个端口处获得的信号的相位偏移。