公开(公告)号：US07684476B2

公开(公告)日：2010-03-23

申请号：US11128190

申请日：2005-05-13

申请人： Hiromasa Fujii ,  Jiyun Shen ,  Takahiro Asai ,  Hitoshi Yoshino

发明人： Hiromasa Fujii ,  Jiyun Shen ,  Takahiro Asai ,  Hitoshi Yoshino

IPC分类号： H04B1/38

CPC分类号： H04L1/0618 ,  H04B17/24 ,  H04L27/2602

摘要： A wireless communication system is disclosed that transmits a feedback signal containing a channel estimate value between a first wireless communication device and a second wireless communication device. The first wireless communication device that transmits the feedback signals includes: a channel estimation unit that receives signals containing pilot signals, and determines the channel estimate value of a wireless link; a multiplier that multiplies a pilot signal by the channel estimate value; and a multiplexer that multiplexes an output signal from the multiplier with another pilot signal, to generate the feedback signal. The second wireless communication device that receives the feedback signal includes: a separator that separates the signals that are multiplexed in the feedback signal; and channel estimation units that determine the channel estimate value of the wireless link, based on the separated signals.

摘要翻译： 公开了一种在第一无线通信设备和第二无线通信设备之间传送包含信道估计值的反馈信号的无线通信系统。 发送反馈信号的第一无线通信装置包括：信道估计单元，其接收包含导频信号的信号，并确定无线链路的信道估计值; 乘法器，用于将导频信号乘以信道估计值; 以及多路复用器，其将来自乘法器的输出信号与另一导频信号进行复用，以产生反馈信号。 接收反馈信号的第二无线通信装置包括：将反馈信号中多路复用的信号分离的分离器; 以及基于分离的信号来确定无线链路的信道估计值的信道估计单元。

公开(公告)号：US20090088083A1

公开(公告)日：2009-04-02

申请号：US12207618

申请日：2008-09-10

申请人： Hiromasa Fujii ,  Hitoshi Yoshino

发明人： Hiromasa Fujii ,  Hitoshi Yoshino

IPC分类号： H04B7/00

CPC分类号： H04W52/367 ,  H04W16/14 ,  H04W52/242 ,  H04W88/08

摘要： A disclosed base station is used in a first wireless communication system using a first frequency band that is the same as or adjacent to a second frequency band used by a second wireless communication system, and includes a propagation loss estimation unit configured to estimate propagation loss of a signal in the first frequency band when the signal arrives at a receiving device of the second wireless communication system; a frequency difference calculation unit configured to calculate a frequency difference between the first frequency band and the second frequency band; a maximum transmission power determining unit configured to determine maximum transmission power based on the estimated propagation loss and the calculated frequency difference; and a transmission control unit configured to transmit a signal with transmission power less than or equal to the maximum transmission power determined by the maximum transmission power determining unit.

摘要翻译： 所公开的基站在第一无线通信系统中使用，该第一无线通信系统使用与由第二无线通信系统使用的第二频带相同或相邻的第一频带，并且包括传播损耗估计单元，被配置为估计传播损耗的传播损耗 信号到达第二无线通信系统的接收装置时的第一频带中的信号; 频率差计算单元，被配置为计算第一频带和第二频带之间的频率差; 最大发送功率确定单元，被配置为基于所估计的传播损耗和所计算的频率差来确定最大发送功率; 以及发送控制单元，被配置为发送具有小于或等于由最大发送功率确定单元确定的最大发送功率的发送功率的信号。

公开(公告)号：US07499496B2

公开(公告)日：2009-03-03

申请号：US11136520

申请日：2005-05-25

申请人： Hiromasa Fujii ,  Jiyun Shen ,  Takahiro Asai ,  Hirohito Suda

发明人： Hiromasa Fujii ,  Jiyun Shen ,  Takahiro Asai ,  Hirohito Suda

IPC分类号： H04K1/10

CPC分类号： H04L27/2621

摘要： An OFDM transmitter (100) is disclosed. The OFDM transmitter comprises: a sorter (103-1) for sorting plural input complex signals and partitioning them into plural groups; plural IFFTs (103-2) for performing inverse Fourier transform on the input complex signals in groups; a peak reducer (103-4) for performing peak reduction, based on outputs from at least one of the IFFTs; and a multiple discrete signal generator (103-5) for generating a designated number of discrete signals from outputs of the peak reducer.

摘要翻译： 公开了一种OFDM发射机（100）。 所述OFDM发射机包括：分类器（103-1），用于对多个输入复合信号进行分类并将其分成多个组; 多个IFFT（103-2），用于对组中的输入复信号进行傅里叶逆变换; 基于来自所述IFFT中的至少一个的输出，执行峰值降低的峰值减速器（103-4）; 以及用于从所述峰值衰减器的输出产生指定数量的离散信号的多重离散信号发生器（103-5）。

公开(公告)号：US07480235B2

公开(公告)日：2009-01-20

申请号：US10984976

申请日：2004-11-10

申请人： Hiromasa Fujii ,  Hirohito Suda

发明人： Hiromasa Fujii ,  Hirohito Suda

IPC分类号： H04J11/00 ,  H04L1/00

CPC分类号： H04L27/2607 ,  H04L1/0007

摘要： An OFDM transmitter transmits an OFDM signal by a frame having a plurality of transmission symbol periods constituted of an effective symbol period for transmitting an information bit and a guard interval. The OFDM transmitter includes a guard interval length decider configured to decide a guard interval length in accordance with a feedback signal from an OFDM receiver; and a guard interval length changer configured to change a guard interval length in each transmission symbol period, in accordance with a decided guard interval length without changing a frame length.

摘要翻译： OFDM发射机通过具有由用于发送信息比特和保护间隔的有效符号周期构成的多个发送符号周期的帧发送OFDM信号。 所述OFDM发射机包括：保护间隔长度判定器，被配置为根据来自OFDM接收机的反馈信号来确定保护间隔长度; 以及保护间隔长度变更器，被配置为根据确定的保护间隔长度改变每个发送符号周期中的保护间隔长度，而不改变帧长度。

公开(公告)号：US07430397B2

公开(公告)日：2008-09-30

申请号：US10989249

申请日：2004-11-17

申请人： Hirohito Suda ,  Takahiro Asai ,  Hiromasa Fujii ,  Tetsu Tanaka

发明人： Hirohito Suda ,  Takahiro Asai ,  Hiromasa Fujii ,  Tetsu Tanaka

IPC分类号： H04B3/36 ,  H04B7/14

CPC分类号： H04B7/15564

摘要： A radio repeater including at least first and second relay systems, each including a reception antenna configured to receive a radio signal, a loop interference suppressor, connected to the reception antenna, configured to suppress a loop interference signal in the received radio signal from said reception antenna, an amplifier configured to amplify the loop interference-suppressed radio signal from the loop interference suppressors, and a transmission antenna having a polarization characteristic, which is orthogonal to a polarization characteristic of said reception antenna, configured to transmit the output of said amplifier.

摘要翻译： 一种无线电中继器，包括至少第一和第二中继系统，每个中继系统包括被配置为接收无线电信号的接收天线，连接到接收天线的环路干扰抑制器，被配置为抑制所接收的来自所述接收的无线电信号中的环路干扰信号 天线，被配置为放大来自环路干扰抑制器的环路干扰抑制无线电信号的放大器，以及具有与所述接收天线的极化特性正交的极化特性的发送天线，被配置为发送所述放大器的输出。

公开(公告)号：US20080207239A1

公开(公告)日：2008-08-28

申请号：US12038456

申请日：2008-02-27

申请人： Hiromasa FUJII ,  Junichiro Hagiwara ,  Hitoshi Yoshino

发明人： Hiromasa FUJII ,  Junichiro Hagiwara ,  Hitoshi Yoshino

IPC分类号： H04B7/00

CPC分类号： H04W16/14 ,  H04W4/02 ,  H04W48/16

摘要： The present invention has an object of providing a transmitter apparatus, a mobile communication system, a base station and a communication enable signal transmitter unit, which can prioritize communications of a mobile station in a priority communication system over communications of a mobile station in a non-priority communication system, in a network where the priority communication system and the non-priority communication system coexist in the same communication area.The non-priority communication transmitter apparatuses 10B and 30B comprise signal transmitter units 16 and 17 configured to be enabled to transmit, to the non-priority communication receiver apparatuses 10B and 30B, a signal by using a frequency channel of a second frequency band, when the non-priority communication transmitter apparatuses 10B and 30B receive a communication enable signal from a priority communication system or when the non-priority communication transmitter apparatuses 10B and 30B detect that the non-priority communication transmitter apparatuses 10B and 30B has received the communication enable signal.

摘要翻译： 本发明的目的是提供一种发送装置，移动通信系统，基站和通信使能信号发送单元，其能够优先考虑优先通信系统中的移动台在非移动台的通信中的通信， 优先级通信系统，在优先通信系统和非优先级通信系统共存于同一通信区域的网络中。 非优先级通信发送装置10B和30B包括信号发送单元16和17，该信号发送单元16和17被配置为能够通过使用第二个频率信道向非优先级通信接收机设备10B和30B发送信号 频段，当非优先通信发送装置10B，30B从优先通信系统接收通信使能信号时，或非优先通信发送装置10B，30B检测出非优先通信发送装置10 B和30B已经接收到通信使能信号。

公开(公告)号：US20070047811A1

公开(公告)日：2007-03-01

申请号：US11514099

申请日：2006-09-01

申请人： Masaya Itoh ,  Hiromasa Fujii

发明人： Masaya Itoh ,  Hiromasa Fujii

IPC分类号： G06K9/34

CPC分类号： G06K9/00785 ,  G06T7/254 ,  G08B13/19602

摘要： A background generating method of low process cost for use in detecting a moving object based on subtraction process performed between an input image and a base image, and an apparatus with the function of detecting a moving object using its background. The apparatus consists of a feature vector extractor for calculating feature vectors from the input image and an average processor capable of obtaining an average from the calculated feature vectors, diminishing noise occurring for a short time and the influence by the moving object, and forming images that follows the illumination change due to changes in the imaging environment. The images generated by the average processor are accumulated for a predetermined number of frames and the accumulated images are statistically processed by a statistical processor.

摘要翻译： 基于在输入图像和基本图像之间执行的减法处理来检测移动物体的低过程成本的背景生成方法，以及具有使用其背景检测移动物体的功能的装置。 该装置由用于计算来自输入图像的特征向量的特征向量提取器和能够从计算出的特征向量获得平均值，减少短时间内出现的噪声以及移动对象的影响的平均处理器，并且形成图像 遵循由于成像环境的变化引起的照明变化。 由平均处理器生成的图像被累积预定数量的帧，并且累积图像由统计处理器进行统计处理。

公开(公告)号：US07151808B2

公开(公告)日：2006-12-19

申请号：US10386571

申请日：2003-03-13

申请人： Hiromasa Fujii ,  Tetsushi Abe ,  Shigeru Tomisato ,  Hirohito Suda

发明人： Hiromasa Fujii ,  Tetsushi Abe ,  Shigeru Tomisato ,  Hirohito Suda

IPC分类号： H04L1/02 ,  H03D3/22

CPC分类号： H04B7/005 ,  H04L2025/03375

摘要： The accuracy of an equalization start timing, an equalization duration and a channel estimation is improved in an application including an increased number of users. An equalization start timing t0, an equalization duration te and channel H estimation are performed for each user signal, and using these, received signal replicas Re1 ro ReN for the respective users are generated. The replicas are subtracted from the received signal to provide an error signal, and Re1 to ReN are added to Es to provide an interference suppressed received signals for the users 1 to N. to, te, H and Re1 to ReN are generated from these to generate Es in a repeated fashion to improve the accuracy of t0, te and H.

摘要翻译： 在包括用户数量增加的应用中，改善了均衡开始定时，均衡持续时间和信道估计的精度。 对于每个用户信号执行均衡开始定时t 0，均衡持续时间t和信道H估计，并且使用这些，接收信号副本Re 1 N 生成各个用户。 从接收到的信号中减去副本以提供误差信号，并且向Es提供Re 1，以向用户1提供干扰抑制的接收信号， 从这些生成N到，te，H和Re 1到Re N以重复的方式产生Es以提高t 0，te和H的精度。

公开(公告)号：US20060198455A1

公开(公告)日：2006-09-07

申请号：US11365532

申请日：2006-03-02

申请人： Hiromasa Fujii ,  Hitoshi Yoshino ,  Takatoshi Sugiyama

发明人： Hiromasa Fujii ,  Hitoshi Yoshino ,  Takatoshi Sugiyama

IPC分类号： H04K1/10

CPC分类号： H04L1/0006 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0058 ,  H04W24/00 ,  H04W72/00 ,  H04W74/08

摘要： A transmitter comprises a frequency utilization status detector configured to detect the utilization status of an allocated frequency band based on a received signal, a symbol placement determination unit configured to determine placement of pilot symbols based on the detected status of frequency utilization, and a symbol placement unit configured to place the pilot symbols according to the determined symbol placement.

公开(公告)号：US20060031583A1

公开(公告)日：2006-02-09

申请号：US10535859

申请日：2003-11-20

申请人： Hiromasa Fujii ,  Shigeru Tomisato ,  Hirohito Suda ,  Tetsuhi Abe ,  Takefumi Yamada

发明人： Hiromasa Fujii ,  Shigeru Tomisato ,  Hirohito Suda ,  Tetsuhi Abe ,  Takefumi Yamada

IPC分类号： G06F15/16

CPC分类号： H04L27/2602 ,  H04B1/7103 ,  H04L27/2607 ,  H04L27/2608 ,  H04L27/261 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2656 ,  H04L27/2662 ,  H04L27/2688

摘要： An object of the present invention is to provide a communications system etc., which can reduce the influence of interference from other systems which results from a difference in symbol length, in an area where a plurality of systems using different transmission methods are mixed. The present invention relates to a communications system in which a plurality of systems share the same frequency bandwidth so as to transmit information symbols. One of the plurality of systems 1 includes an identifying unit 109 configured to identify the symbol length of an information symbol transmitted in a different system 2; and an adjusting unit 102, 107 configured to adjust the symbol length of an information symbol to be transmitted, in accordance with an identified symbol length.

摘要翻译： 本发明的目的是提供一种通信系统等，其可以在混合使用不同传输方式的多个系统的区域中减少由于符号长度不同而引起的其他系统的干扰的影响。 本发明涉及一种通信系统，其中多个系统共享相同的频率带宽以便发送信息符号。 多个系统1中的一个包括识别单元109，其被配置为识别在不同系统2中发送的信息符号的符号长度; 以及调整单元102,107，其被配置为根据所识别的符号长度来调整要发送的信息符号的符号长度。