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公开(公告)号：US06442218B1
公开(公告)日：2002-08-27
申请号：US09377141
申请日：1999-08-19
申请人： Michiharu Nakamura , Yasuyuki Oishi , Kazuo Nagatani , Hajime Hamada , Yoshihiko Asano , Hiroyuki Seki , Yoshinori Tanaka
发明人： Michiharu Nakamura , Yasuyuki Oishi , Kazuo Nagatani , Hajime Hamada , Yoshihiko Asano , Hiroyuki Seki , Yoshinori Tanaka
IPC分类号： H03D100
CPC分类号： H04L25/062 , H04L25/03114
摘要： The present invention relates to a demodulator which receives a signal transmitted via phase modulation or multivalue QAM modulation, and decides transmitted data based on the received signal. The present invention enhances a transmission-line estimate by using tentatively decided data symbols as pilot symbols and in estimating a transmission line without a decrease in accuracy of transmission-line estimate even when an error rate of the tentatively decided data symbols is increased. The demodulator includes a pilot-based transmission-line estimation unit for estimating transmission-line characteristics by using pilot symbols. A tentative-data-decision unit for tentatively deciding data symbols based on the pilot-based transmission-line estimate. A data-based transmission-line estimation unit for estimating the transmission-line characteristics by using the tentatively decided data. Weight-coefficient-multiplication units for multiplying pilot-based and data-based transmission-line estimates by respective weights having a ratio therebetween varying in accordance with reliability of the tentatively ascertained data. A pilot&data-based transmission-line estimation unit for obtaining a transmission-line estimate by averaging weighted transmission-line estimates.
摘要翻译： 本发明涉及一种接收通过相位调制或多值QAM调制发送的信号的解调器，并且基于接收到的信号来确定发送的数据。 本发明通过使用暂时确定的数据符号作为导频符号，并且即使当临时确定的数据符号的错误率增加时，也不会降低传输线估计的精度，来增强传输线估计。 解调器包括基于导频的传输线估计单元，用于通过使用导频符号估计传输线特性。 一种暂定数据判定单元，用于基于基于导频的传输线估计暂时地确定数据符号。 一种基于数据的传输线估计单元，用于通过使用暂时确定的数据来估计传输线特性。 权重系数乘法单元，用于乘以基于导频和基于数据的传输线估计，其各自的权重之间的比率根据暂时确定的数据的可靠性而变化。 一种基于导频和数据的传输线估计单元，用于通过对加权的传输线估计进行平均来获得传输线估计。
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公开(公告)号：US20060038659A1
公开(公告)日：2006-02-23
申请号：US11130244
申请日：2005-05-17
申请人： Takeshi Takano , Tomohiko Taniguchi , Yasuyuki Oishi , Yoshinori Tanaka , Teruhisa Ninomiya , Nobuhisa Aoki , Yuichi Nakanishi
发明人： Takeshi Takano , Tomohiko Taniguchi , Yasuyuki Oishi , Yoshinori Tanaka , Teruhisa Ninomiya , Nobuhisa Aoki , Yuichi Nakanishi
IPC分类号： H04Q5/22
CPC分类号： G06K7/10356 , G06K7/0008
摘要： A system establishes synchronicity of transmission and receiving for each reader/writer of an RF tag independently without obtaining synchronization of the reader/writers by means of an unspecified number of control terminals is desired as a reader/writer system. A reader/writer comprises a transmitter operable to transmit an interrogation signal to an RF tag, and a receiver operable to receive a response signal from an RF tag, wherein the transmitter is operable to transmit an interrogation signal based on a synchronization signal received from another reader/writer.
摘要翻译： 作为读/写系统，系统需要独立地建立RF标签的每个读/写器的发送和接收的同步性，而无需通过未指定数量的控制终端获得读/写器的同步。 读写器包括可操作以将讯号信号发射到RF标签的发射器和可操作以从RF标签接收响应信号的接收器，其中发射器可操作以基于从另一个接收的同步信号发送询问信号 读者/作家
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3.发明授权Coherent detecting method using a pilot symbol and a tentatively determined data symbol, a mobile communication receiver and an interference removing apparatus using the coherent detecting method 失效使用导频符号和暂时确定的数据符号的相干检测方法，使用相干检测方法的移动通信接收机和干扰去除装置公开(公告)号：US06304624B1
公开(公告)日：2001-10-16
申请号：US09168119
申请日：1998-10-07
IPC分类号： H04L706
CPC分类号： H04L25/0236 , H04B1/71075 , H04B2201/70701 , H04L7/04 , H04L25/0214
摘要： A coherent detecting circuit accurately estimates a propagation characteristic of a propagation path without increasing the number of pilot symbols when a fading frequency is high so that an error rate of received data is decreased. At least one pilot symbol is received from a transmitter. The pilot symbol may be provided in a data frame of data symbols, or transmitted through a channel different from a channel of the data symbols. A first estimated value of the propagation characteristic of a propagation path is estimated by using the pilot symbol. The data symbols are tentatively determined based on an estimated value of the propagation path. A second estimated value of the propagation characteristic is estimated by using the pilot symbol and at lease one of the tentatively determined data symbols. The data symbols are finally determined based on the second estimated value of the propagation characteristic.
摘要翻译： 当衰落频率高时，相干检测电路能够精确地估计传播路径的传播特性而不增加导频符号数，从而降低接收数据的错误率。 从发射机接收至少一个导频符号。 导频符号可以被提供在数据符号的数据帧中，或者通过与数据符号的信道不同的信道发送。 通过使用导频符号来估计传播路径的传播特性的第一估计值。 基于传播路径的估计值暂时确定数据符号。 通过使用导频符号和暂时确定的数据符号中的至少一个来估计传播特性的第二估计值。 最终基于传播特性的第二估计值来确定数据符号。
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公开(公告)号：US08542575B2
公开(公告)日：2013-09-24
申请号：US12368553
申请日：2009-02-10
CPC分类号： H04B7/0691 , H04B7/02 , H04B7/061 , H04L1/0003 , H04L1/0009 , H04L1/06 , H04L1/0618 , H04L1/08 , H04L1/1607 , H04L1/18 , H04L1/1835 , H04L1/1874 , H04L1/1893
摘要： In a multiple-input multiple-output transmission system (MIMO system), a receive station detects whether or not there is an error in each data stream, estimates the state of the propagation path of each transmit antenna and reports, to the transmitting side, re-transmission necessary/unnecessary information, for every data stream, created based upon whether or not there is an error, and the state of the propagation path of each transmit antenna. A transmit station decides a transmit antenna that transmits a data stream requiring re-transmission, based upon the reported state of the propagation path of each transmit antenna, and re-transmits the data stream requiring re-transmission from the transmit antenna decided.
摘要翻译： 在多输入多输出传输系统（MIMO系统）中，接收站检测每个数据流中是否存在错误，估计每个发射天线的传播路径的状态并向发射侧报告， 对于根据是否存在错误而创建的每个数据流，重新发送必要/不必要的信息，以及每个发射天线的传播路径的状态。 发送站基于所报告的每个发送天线的传播路径的状态来决定发送需要再发送的数据流的发送天线，并从所决定的发送天线重新发送需要再发送的数据流。
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5.发明授权公开(公告)号：US07924784B2
公开(公告)日：2011-04-12
申请号：US10872314
申请日：2004-06-17
CPC分类号： H04B7/0634 , H04B7/022
摘要： Disclosed is a feedback control method in closed-loop transmit diversity in which feedback information representing amounts of amplitude and phase control is transmitted from a mobile station to a radio base station. The mobile station receives downlink pilot signals, which are transmitted by a handover-destination base station, during handover control, calculates feedback information, which represents amounts of amplitude and phase and phase control transmitted to the handover-destination base station, beforehand based upon the pilot signals received, and transmits the feedback information to the handover-destination base station before completion of base-station changeover by handover.
摘要翻译： 公开了一种闭环发送分集中的反馈控制方法，其中表示幅度和相位控制量的反馈信息从移动台发送到无线基站。 在切换控制期间，移动站接收由切换目的地基站发送的下行链路导频信号，预先基于发送到切换目的地基站的幅度和相位和相位控制的量，反馈信息 接收的导频信号，并且在通过切换完成基站切换之前将反馈信息发送到切换目的地基站。
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6.发明申请公开(公告)号：US20110058592A1
公开(公告)日：2011-03-10
申请号：US12104888
申请日：2008-04-17
IPC分类号： H04B1/707
CPC分类号： H04B7/0669 , H04L5/026
摘要： In multicarrier transmission for multiplying transmit data individually by each code constituting orthogonal codes and transmitting each result of multiplication by a prescribed subcarrier, a plurality of different subcarriers are assigned exclusively to each user and each user performs multicarrier transmission of the transmit data by the subcarriers assigned. Further, a base station assigns a plurality of different subcarriers to each user exclusively, applies beam-forming processing on a per-user basis and performs multicarrier transmission of transmit data to each user by the subcarriers assigned.
摘要翻译： 在多载波传输中，通过构成正交码的每个码分别发送数据，并将每个乘法结果发送给规定的副载波，多个不同的副载波被分配给每个用户，每个用户通过分配的子载波进行发射数据的多载波传输 。 此外，基站分配多个不同的子载波给每个用户，对每个用户进行波束形成处理，并通过分配的子载波对每个用户执行发送数据的多载波传输。
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公开(公告)号：US07826346B2
公开(公告)日：2010-11-02
申请号：US11233189
申请日：2005-09-22
CPC分类号： H04B7/0691 , H04B7/02 , H04B7/061 , H04L1/0003 , H04L1/0009 , H04L1/06 , H04L1/0618 , H04L1/08 , H04L1/1607 , H04L1/18 , H04L1/1835 , H04L1/1874 , H04L1/1893
摘要： In a multiple-input multiple-output transmission system (MIMO system), a receive station detects whether or not there is an error in each data stream, estimates the state of the propagation path of each transmit antenna and reports, to the transmitting side, re-transmission necessary/unnecessary information, for every data stream, created based upon whether or not there is an error, and the state of the propagation path of each transmit antenna. A transmit station decides a transmit antenna that transmits a data stream requiring re-transmission, based upon the reported state of the propagation path of each transmit antenna, and re-transmits the data stream requiring re-transmission from the transmit antenna decided.
摘要翻译： 在多输入多输出传输系统（MIMO系统）中，接收站检测每个数据流中是否存在错误，估计每个发射天线的传播路径的状态并向发射侧报告， 对于根据是否存在错误而创建的每个数据流，重新发送必要/不必要的信息，以及每个发射天线的传播路径的状态。 发送站基于所报告的每个发送天线的传播路径的状态来决定发送需要再发送的数据流的发送天线，并从所决定的发送天线重新发送需要再发送的数据流。
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公开(公告)号：US20090175374A1
公开(公告)日：2009-07-09
申请号：US12368553
申请日：2009-02-10
IPC分类号： H04K1/10
CPC分类号： H04B7/0691 , H04B7/02 , H04B7/061 , H04L1/0003 , H04L1/0009 , H04L1/06 , H04L1/0618 , H04L1/08 , H04L1/1607 , H04L1/18 , H04L1/1835 , H04L1/1874 , H04L1/1893
摘要： In a multiple-input multiple-output transmission system (MIMO system), a receive station detects whether or not there is an error in each data stream, estimates the state of the propagation path of each transmit antenna and reports, to the transmitting side, re-transmission necessary/unnecessary information, for every data stream, created based upon whether or not there is an error, and the state of the propagation path of each transmit antenna. A transmit station decides a transmit antenna that transmits a data stream requiring re-transmission, based upon the reported state of the propagation path of each transmit antenna, and re-transmits the data stream requiring re-transmission from the transmit antenna decided.
摘要翻译： 在多输入多输出传输系统（MIMO系统）中，接收站检测每个数据流中是否存在错误，估计每个发射天线的传播路径的状态并向发射侧报告， 对于根据是否存在错误而创建的每个数据流，重新发送必要/不必要的信息，以及每个发射天线的传播路径的状态。 发送站基于所报告的每个发送天线的传播路径的状态来决定发送需要再发送的数据流的发送天线，并从所决定的发送天线重新发送需要再发送的数据流。
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9.发明授权Mobile communication system and communication method for mobile communication system 失效移动通信系统及移动通信系统的通信方法公开(公告)号：US07366538B2
公开(公告)日：2008-04-29
申请号：US11509389
申请日：2006-08-24
申请人： Hiroyuki Seki , Yoshinori Tanaka
发明人： Hiroyuki Seki , Yoshinori Tanaka
IPC分类号： H04B7/00
摘要： A mobile communication system performing communication between a plurality of base stations and a mobile station is provided. A user data signal is transmitted with the transmission power controlled from one base station selected among the plurality of base stations. Control data signals are transmitted from the plurality of base stations to the mobile station, with the transmission power controlled in a similar way as the user data signal. The mobile station measures quality of the control data signals on a basis of each base station, and selects a base station based on the measured control data signal quality of each base station.
摘要翻译： 提供了在多个基站和移动站之间执行通信的移动通信系统。 以从多个基站中选择的一个基站控制的发送功率发送用户数据信号。 控制数据信号从多个基站发送到移动台，发射功率以与用户数据信号相似的方式进行控制。 移动站基于每个基站测量控制数据信号的质量，并且基于每个基站的测量的控制数据信号质量来选择基站。
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公开(公告)号：US07349483B2
公开(公告)日：2008-03-25
申请号：US10783791
申请日：2004-02-20
申请人： Hiroyuki Seki , Yoshinori Tanaka
发明人： Hiroyuki Seki , Yoshinori Tanaka
CPC分类号： H04B7/01
摘要： A communications device with the capability of accurately estimating Doppler frequency for improved wireless communication. At radio frame intervals, a complex time-domain response measurement unit obtains complex time-domain response signals representing the characteristics of propagation paths. A phase difference calculator then calculates absolute phase differences between a selected set of complex time-domain response signals, such as those having the largest magnitude in respective frames. In the case where such maximum signals change their time positions frequently, the time position of the maximum signal in a particular frame is selected, and the complex time-domain response signals extracted from that fixed position in consecutive frames are subjected to the phase difference calculation. The mean value of those absolute phase differences are calculated over a plurality of radio frames by an average operator. Finally, a Doppler frequency estimator estimates Doppler frequency by dividing the mean value by the time length of the radio frame.
摘要翻译： 具有准确估计多普勒频率以改善无线通信能力的通信设备。 在无线电帧间隔，复杂时域响应测量单元获得表示传播路径特性的复数时域响应信号。 相位差计算器然后计算所选择的复合时域响应信号集合之间的绝对相位差，例如在各个帧中具有最大幅度的信号。 在这种最大信号频繁地改变其时间位置的情况下，选择特定帧中的最大信号的时间位置，并且从连续帧中的该固定位置提取的复数时域响应信号经受相位差计算 。 这些绝对相位差的平均值由平均算子在多个无线电帧上计算。 最后，多普勒频率估计器通过将平均值除以无线电帧的时间长度来估计多普勒频率。
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