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22 条记录 (耗时 0.016 秒)

    Spread-spectrum signal receiver apparatus and interference cancellation apparatus
    1.
    发明授权
    Spread-spectrum signal receiver apparatus and interference cancellation apparatus 失效
    扩频信号接收装置和干扰消除装置

    公开(公告)号：US06920173B2

    公开(公告)日：2005-07-19

    申请号：US10033196

    申请日：2001-12-28

    申请人： Tadashi Nakamura ,  Tetsuhiro Futami

    发明人： Tadashi Nakamura ,  Tetsuhiro Futami

    IPC分类号： H04B1/707 ,  H04B1/10 ,  H04B1/7107 ,  H04J13/00 ,  H04K1/00 ,  H04B1/69 ,  H04B1/713

    CPC分类号： H04B1/71075

    摘要： In a spread-spectrum signal receiver apparatus for receiving a spread-spectrum signal and demodulating transmit data from the signal, a receiver receives a spread-spectrum signal that has been spread by a spreading code comprising a combination of a first code that varies depending upon spreading factor and a second code that differs for every user, an interference canceller produces a replica of an interference signal from the receive signal using a despreading code comprising a combination of the first code, which is regarded as a code decided based upon a minimum spreading factor, and the second code that differs for every user, and a receive modulator demodulates transmit data from a signal obtained by subtracting the replica from the receive signal.

    摘要翻译： 在扩展频谱信号接收装置中，接收扩频信号并解调来自信号的发射数据，接收机接收扩展码扩展的扩频信号，该扩频码包括根据第 扩展因子和对于每个用户不同的第二代码，干扰消除器使用解扩码产生来自接收信号的干扰信号的副本，解扩码包括第一代码的组合，第一代码被认为是基于最小扩展 因子和对于每个用户不同的第二代码，并且接收调制器从通过从接收信号中减去副本而获得的信号来解调发送数据。

    Apparatus and method for fading frequency estimation
    4.
    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。

    CARRIER SYNCHRONIZING CIRCUIT AND CARRIER SYNCHRONIZING METHOD
    5.
    发明申请
    CARRIER SYNCHRONIZING CIRCUIT AND CARRIER SYNCHRONIZING METHOD 有权
    载波同步电路和载波同步方法

    公开(公告)号：US20080260086A1

    公开(公告)日：2008-10-23

    申请号：US12104817

    申请日：2008-04-17

    申请人： Hideyuki MATSUMOTO ,  Tetsuhiro Futami ,  Koji Naniwada ,  Yuichi Hirayama

    发明人： Hideyuki MATSUMOTO ,  Tetsuhiro Futami ,  Koji Naniwada ,  Yuichi Hirayama

    IPC分类号： H04L7/00

    CPC分类号： H04L27/0014 ,  H04L2027/0034 ,  H04L2027/0053 ,  H04L2027/0065 ,  H04L2027/0073

    摘要： Disclosed herein is a carrier synchronizing circuit including at least frequency synchronizing means and phase synchronizing means. The phase synchronizing means includes residual frequency error detecting means for detecting a residual frequency error after a frequency synchronizing process by the frequency synchronizing means and supplying the residual frequency error to the frequency synchronizing means, and the frequency synchronizing means performs frequency pull-in for the residual frequency error supplied from the residual frequency error detecting means after first timing.

    摘要翻译： 这里公开了一种载波同步电路，至少包括频率同步装置和相位同步装置。 相位同步装置包括残余频率误差检测装置，用于检测由频率同步装置进行频率同步处理后的残余频率误差，并向频率同步装置提供残余频率误差，并且频率同步装置对 在第一定时之后从残余频率误差检测装置提供的残余频率误差。

    Demodulating apparatus and demodulating method
    7.
    发明授权
    Demodulating apparatus and demodulating method 有权
    解调装置和解调方法

    公开(公告)号：US08374290B2

    公开(公告)日：2013-02-12

    申请号：US12597503

    申请日：2008-04-25

    申请人： Tetsuhiro Futami ,  Yuichi Mizutani

    发明人： Tetsuhiro Futami ,  Yuichi Mizutani

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H04L25/03012 ,  H04L27/38 ,  H04L2025/03471

    摘要： This invention relates to a demodulating apparatus and a demodulating method for demodulating an input signal more quickly than before when the channels of the input signal are inverted.A correlator 152 calculates a correlation value indicative of the correlation between a known delayed detection sequence made of symbols of correct delayed detection values of a known sequence inserted in the input signal and a received delayed detection sequence obtained through delay detection of the input signal. If the imaginary part of the correlation value is less than zero, a channel control section 132 switches the channels of the input signal before feeding the signal to a frame synchronization circuit 122. This invention can be applied illustratively to a satellite broadcast receiving apparatus.

    摘要翻译： 本发明涉及一种解调装置和一种解调方法，用于当输入信号的信道反相时，比以前更快地解调输入信号。 相关器152计算指示由插入在输入信号中的已知序列的正确延迟检测值的符号构成的已知延迟检测序列与通过输入信号的延迟检测获得的接收延迟检测序列之间的相关性的相关值。 如果相关值的虚部小于零，则信道控制部分132在将信号馈送到帧同步电路122之前切换输入信号的信道。本发明可以示例性地应用于卫星广播接收装置。

    Radio communication apparatus and communication method
    8.
    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：US08265183B2

    公开(公告)日：2012-09-11

    申请号：US12606747

    申请日：2009-10-27

    申请人： Dai Kimura ,  Tetsuhiro Futami ,  Yoshihiro Kawasaki

    发明人： Dai Kimura ,  Tetsuhiro Futami ,  Yoshihiro Kawasaki

    IPC分类号： H04L27/28

    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 格式决定部基于各移动台的接收状态来决定各时隙的保护间隔长度不同的帧格式，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，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。

    Frame synchronization apparatus and its control method
    9.
    发明授权
    Frame synchronization apparatus and its control method 有权
    帧同步装置及其控制方法

    公开(公告)号：US08045668B2

    公开(公告)日：2011-10-25

    申请号：US12136821

    申请日：2008-06-11

    申请人： Tetsuhiro Futami

    发明人： Tetsuhiro Futami

    IPC分类号： H04L7/00

    CPC分类号： H04L7/042 ,  H04L27/227 ,  H04L2027/003 ,  H04L2027/0065 ,  H04L2027/0095

    摘要： A frame synchronization apparatus and method for controlling a frame synchronization process. The frame synchronization apparatus includes a correlation-value computation section; an IQ component select section; and a synchronization-signal outputting section. The correlation-value computation section computes a correlation value representing a correlation between a known delay wave detection series and a received delay wave detection series. The IQ component select selects a larger one of absolute values representing the amplitudes of I and Q. The synchronization-signal outputting section carries out a peak detection process to detect a peak in pieces of data arranged along a time axis to form a correlation-value series and output a frame synchronization signal for said input signal in accordance with a result of said peak detection process.

    摘要翻译： 一种用于控制帧同步过程的帧同步装置和方法。 帧同步装置包括相关值计算部分; IQ组件选择部分; 和同步信号输出部。 相关值计算部分计算表示已知延迟波检测系列和接收到的延迟波检测系列之间的相关性的相关值。 IQ分量选择选择表示I和Q的幅度的绝对值中较大的一个。同步信号输出部分执行峰值检测处理以检测沿时间轴排列的数据的峰值，以形成相关值 并根据所述峰值检测处理的结果输出所述输入信号的帧同步信号。

    Radio communication apparatus and communication method
    10.
    发明申请
    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：US20070274203A1

    公开(公告)日：2007-11-29

    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： H04J11/00

    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。