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    Apparatus and method for fading frequency estimation
    2.
    发明授权
    Apparatus and method for fading frequency estimation 有权
    用于衰落频率估计的装置和方法

    公开(公告)号：US07548595B2

    公开(公告)日：2009-06-16

    申请号：US10988411

    申请日：2004-11-12

    申请人： Tsuyoshi Shimomura ,  Dai Kimura ,  Tetsuhiro Futami ,  Morihiko Minowa

    发明人： Tsuyoshi Shimomura ,  Dai Kimura ,  Tetsuhiro Futami ,  Morihiko Minowa

    IPC分类号： H03K9/00

    CPC分类号： H04L25/0202 ,  H04B2201/70701 ,  H04L25/0222

    摘要： The invention relates to an apparatus and a method for estimating a fading frequency of incoming received waves in a receiving station of a radio communication system or radio transmission system. An object of the invention is to estimate a fading frequency efficiently and accurately without substantially complexing the configuration of the system. To this end, the invention provides an apparatus for estimating a fading frequency from a pilot signal in a reception signal, which includes a calculation unit for calculating a magnitude of a complex product of two symbols that are received at different instants, and an estimation unit for estimating a fading frequency according to the calculated magnitude of the complex product.

    摘要翻译： 本发明涉及一种用于估计无线电通信系统或无线电传输系统的接收站中的输入接收波的衰落频率的装置和方法。 本发明的目的是有效且准确地估计衰落频率，而不会使系统的配置基本上复杂化。 为此，本发明提供了一种用于从接收信号中的导频信号估计衰落频率的装置，其包括：用于计算在不同时刻接收的两个符号的复乘的幅度的计算单元和估计单元 用于根据所计算的复数乘积的大小来估计衰落频率。

    Synchronization detecting apparatus
    3.
    发明授权
    Synchronization detecting apparatus 有权
    同步检测装置

    公开(公告)号：US07366228B2

    公开(公告)日：2008-04-29

    申请号：US09918964

    申请日：2001-07-31

    申请人： Morihiko Minowa ,  Dai Kimura ,  Noriyuki Kawaguchi

    发明人： Morihiko Minowa ,  Dai Kimura ,  Noriyuki Kawaguchi

    IPC分类号： H04B1/00

    CPC分类号： H04B1/7075 ,  H04B2201/70701 ,  H04L25/0232

    摘要： In a channel estimating circuit, a Sync Word is demodulated by using a channel estimation value not with a symbol or a slot including the Sync Word to be demodulated, but with its preceding and succeeding symbols or slots. Furthermore, in a channel estimation process, if a Synch Word to be demodulated is included in any of groups into which a plurality of symbols are divided, the Sync Word is demodulated by using a channel estimation value obtained with the channel estimation process using not this group but another group.

    摘要翻译： 在信道估计电路中，通过使用不具有符号的信道估计值或包括要解调的同步字，但具有其前和后符号或时隙的信道估计值来解调同步字。 此外，在信道估计处理中，如果要解调的同步字被包括在划分多个符号的组中的任一组中，则使用不是使用信道估计处理获得的信道估计值来解调同步字 小组，但另一组。

    CDMA receiver
    4.
    发明授权
    CDMA receiver 有权
    CDMA接收机

    公开(公告)号：US07170925B2

    公开(公告)日：2007-01-30

    申请号：US10074939

    申请日：2002-02-13

    申请人： Noriyuki Kawaguchi ,  Satoshi Nakamura ,  Kensuke Sawada ,  Dai Kimura ,  Tokuro Kubo ,  Morihiko Minowa

    发明人： Noriyuki Kawaguchi ,  Satoshi Nakamura ,  Kensuke Sawada ,  Dai Kimura ,  Tokuro Kubo ,  Morihiko Minowa

    IPC分类号： H04B1/707

    CPC分类号： H04B1/712 ,  H04B1/7115 ,  H04B2201/7071

    摘要： In a CDMA receiver for applying despread processing to direct wave or delayed waves that arrive via each path of multiple paths, applying synchronous detection processing to the despread signals obtained, combining the detection signals of respective paths and discriminating the received data on the basis of the combined signal, (1) a weighting unit provided for every path measures power of delayed received waves that arrive via its own path and, if the reception power is less than a set level (breakpoint level), subjects an output signal to weighting conforming to the reception power; (2) a RAKE combiner combines signals output from the weighting units of the respective paths; and (3) a data discrimination unit discriminates receive data based upon the output signal of the combiner.

    摘要翻译： 在用于对通过多个路径的每条路径到达的直达波或延迟波的解扩处理的CDMA接收机中，对获得的去扩展信号应用同步检测处理，组合各个路径的检测信号，并基于 组合信号，（1）为每个路径提供的加权单元测量通过其自身路径到达的延迟接收波的功率，并且如果接收功率小于设定电平（断点电平），则对输出信号进行加权以符合 接待能力; （2）RAKE组合器组合从相应路径的加权单元输出的信号; 和（3）数据鉴别单元基于组合器的输出信号来鉴别接收数据。

    Radio receiver
    5.
    发明授权
    Radio receiver 失效

    公开(公告)号：US07133475B2

    公开(公告)日：2006-11-07

    申请号：US10113736

    申请日：2002-04-01

    申请人： Noriyuki Kawaguchi ,  Morihiko Minowa ,  Dai Kimura

    发明人： Noriyuki Kawaguchi ,  Morihiko Minowa ,  Dai Kimura

    IPC分类号： H03K9/00 ,  H04B1/707

    CPC分类号： H04L7/042

    摘要： The invention relates to a radio receiver which receives reception waves modulated with a frame being a sequence of slots and reproduces transmission information that is distributed to the slots. An object of the invention is to increase the reliability of channel inference and improve the transmission quality without substantially altering a basic configuration. A radio receiver of the invention performs quasi-synchronous detection on reception waves modulated with a frame; determines an error in a sequence of first vectors and a sequence of second vectors as an average of deviations of particular symbol positions to be indicated by the sequence of first vectors indicating a sequence of words included in each slot in a signal space, and the sequence of second vectors indicating known information included in the slots; and compensates for the error in the signal space.

    Frequency division communication system
    6.
    发明申请
    Frequency division communication system 审中-公开
    分频通信系统

    公开(公告)号：US20080304446A1

    公开(公告)日：2008-12-11

    申请号：US11826297

    申请日：2007-07-13

    申请人： Dai Kimura ,  Takashi Dateki ,  Toshiro Sawamoto ,  Morihiko Minowa

    发明人： Dai Kimura ,  Takashi Dateki ,  Toshiro Sawamoto ,  Morihiko Minowa

    IPC分类号： H04Q7/00

    CPC分类号： H04L5/0046 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/143

    摘要： An orthogonal frequency division communication system which enables flexible modification of the ratio of allocation between uplink and downlink transmissions, while maintaining advantages similar to those of TDD (Time Division Duplex) systems, has a base station and a plurality of mobile stations connected by uplinks and downlinks, and a plurality of mutually orthogonal frequencies are allocated, on the frequency axis and on the time axis, to the uplinks and downlinks and to the plurality of mobile stations.

    摘要翻译： 能够灵活地修改上行链路和下行链路传输之间的分配比例的正交频分通信系统，同时保持与TDD（时分双工）系统相似的优点，具有通过上行链路连接的基站和多个移动台， 下行链路和多个相互正交的频率在频率轴和时间轴上分配给上行链路和下行链路以及多个移动台。

    Transmission power control apparatus
    7.
    发明授权
    Transmission power control apparatus 失效

    公开(公告)号：US07062287B2

    公开(公告)日：2006-06-13

    申请号：US10072058

    申请日：2002-02-08

    申请人： Satoshi Nakamura ,  Morihiko Minowa ,  Noriyuki Kawaguchi ,  Kensuke Sawada ,  Tokuro Kubo ,  Dai Kimura

    发明人： Satoshi Nakamura ,  Morihiko Minowa ,  Noriyuki Kawaguchi ,  Kensuke Sawada ,  Tokuro Kubo ,  Dai Kimura

    IPC分类号： H04B7/00 ,  H04Q7/20

    CPC分类号： H04W52/12 ,  H04W52/20 ,  H04W52/24 ,  H04W52/283

    摘要： In a transmission power control apparatus for measuring SIR, which is a ratio of a receive signal to an interference signal, and controlling transmission power of a mobile station in such a manner that the measured SIR will agree with a target SIR, a fading detector detects the rate of change in fading, a correction unit corrects the target SIR based upon the rate of change in fading, and a transmission power control command creation unit creates a command for controlling transmission power of the mobile station in such a manner that the measured SIR will agree with the corrected target SIR, and transmits this command. Further, a searcher detects multipath and the levels of signals that arrive via respective ones of the paths, a level-difference calculation unit calculates level differences between the paths, a correction unit corrects the target SIR based upon the level differences between the paths, and a transmission power control command creation unit creates a command for controlling transmission power of the mobile station in such a manner that the measured SIR will agree with the corrected target SIR, and transmits this command.

    Radio communication apparatus and communication method
    9.
    发明授权
    Radio communication apparatus and communication method 有权
    无线电通信装置和通信方法

    公开(公告)号：US07609775B2

    公开(公告)日：2009-10-27

    申请号：US11808541

    申请日：2007-06-11

    申请人： Dai Kimura ,  Tetsuhiro Futami ,  Yoshihiro Kawasaki

    发明人： Dai Kimura ,  Tetsuhiro Futami ,  Yoshihiro Kawasaki

    IPC分类号： H04L27/28 ,  H04B1/69

    CPC分类号： H04L27/2647 ,  H04L27/2607

    摘要： In a radio communication apparatus for forming a frame with a plurality of slots, and inserting a guard interval into each slot along with data for a mobile station to perform communication, a receive state acquisition section acquires a receive state of each mobile station, a frame format decision section decides a frame format of which guard interval length is, different for each slot based on the receive state of each mobile station, a slot assignment section assigns each slot of the frame format to data for each mobile station, and a frame format reporting section reports the decided frame format to the mobile stations via a reporting channel. The mobile station identifies the GI length based on the reported frame format and the slot number, removes the guard interval, and performs processing.

    摘要翻译： 在用于形成具有多个时隙的帧的无线电通信装置中，并且与用于移动台进行通信的数据一起将保护间隔与每个时隙一起插入，接收状态获取部分获取每个移动台的接收状态，帧 格式决定部基于每个移动台的接收状态来决定保护间隔长度对于每个时隙不同的帧格式，时隙分配部将帧格式的每个时隙分配给每个移动台的数据，以及帧格式 报告部分通过报告信道将确定的帧格式报告给移动台。 移动台基于所报告的帧格式和时隙号识别GI长度，消除保护间隔，并执行处理。