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1. 发明授权

US06563859B1 Receiver and receiving method in multi-carrier spread-spectrum communications 失效
标题翻译：多载波扩频通信中的接收和接收方法
公开(公告)号：US06563859B1
公开(公告)日：2003-05-13
申请号：US09440341
申请日：1999-11-15
申请人： Yasuyuki Oishi , Michiharu Nakamura , Kazuo Nagatani , Hajime Hamada , Yoshihiko Asano
发明人： Yasuyuki Oishi , Michiharu Nakamura , Kazuo Nagatani , Hajime Hamada , Yoshihiko Asano
IPC分类号： H04B1707
CPC分类号： H04B1/7115 , H04B1/692 , H04L5/026 , H04L27/2647
摘要： A multi-carrier signal received by an antenna is converted into a signal of an IF band by an RX, and converted into an I signal and a Q signal by an quadrature detector. The I signal and the Q signal as multi-carrier signals are converted into digital signals by an A/D converter, and input to complex filters. The complex filters extract a complex signal having a specified carrier. Then, complex filters shift the center frequency of the extracted complex signal into 0 Hz. The obtained base band signal is input to a finger, and despread and demodulated. The despread and demodulated signal is RAKE synthesized by a synthesis unit, and transmitted to a signal discrimination unit.
摘要翻译：由天线接收的多载波信号通过RX被转换为IF频带的信号，并由正交检波器转换为I信号和Q信号。作为多载波信号的I信号和Q信号由A / D转换器转换成数字信号，并输入到复数滤波器。复数滤波器提取具有指定载波的复信号。然后，复数滤波器将提取的复信号的中心频率移动到0Hz。所获得的基带信号被输入到手指，并被解扩和解调。解扩信号由合成单元RAKE合成，发送到信号鉴别单元。

2. 发明授权

US06442218B1 Demodulator 失效
标题翻译：解调器
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。

3. 发明授权

US06487193B1 Path searched device and CDMA receiver with the same 失效
标题翻译：路径搜索设备和CDMA接收机相同
公开(公告)号：US06487193B1
公开(公告)日：2002-11-26
申请号：US09378265
申请日：1999-08-20
申请人： Hajime Hamada , Yasuyuki Oishi , Kazuo Nagatani , Michiharu Nakamura , Koji Matsuyama
发明人： Hajime Hamada , Yasuyuki Oishi , Kazuo Nagatani , Michiharu Nakamura , Koji Matsuyama
IPC分类号： H04B7216
CPC分类号： H04B7/18584
摘要： The present invention is directed to a path searching device and a CDMA receiver employing the same, having a reduced circuit scale and operating to carry out a smaller number of operations. For a direct spreading CDMA communication system, a CDMA receiver includes a reception demodulator including an antenna, a high-frequency amplifier a band-pass filter, demodulators, etc. The CDMA receiver also has despreading units, a determination unit, and a path search device. The path search device has a sampling unit for sampling an input signal by low-speed oversampling based on an integer multiple of a chip rate and by high-speed oversampling that is faster than the low-speed oversampling, a first circuit for finding a correlative value between a spreading code and a signal provided by the low-speed oversampling and finding timing corresponding to a maximum correlative value. A second circuit for finding despreading timing according to correlative values between a signal provided by the high-speed oversampling and a spreading code corresponding to the timing provided by the first circuit.
摘要翻译：本发明涉及一种路径搜索装置和采用该路径搜索装置的CDMA接收机，其具有减小的电路规模并且操作以执行较少数量的操作。对于直接扩频CDMA通信系统，CDMA接收机包括接收解调器，包括天线，高频放大器，带通滤波器，解调器等。CDMA接收机还具有解扩单元，确定单元和路径搜索设备。路径搜索装置具有采样单元，用于通过基于芯片速率的整数倍的低速过采样和通过比低速过采样快的高速过采样来对输入信号进行采样，用于找到相关的第一电路扩展码与由对应于最大相关值的低速过采样和寻找定时提供的信号之间的值。根据由高速过采样提供的信号与对应于由第一电路提供的定时的扩展码之间的相关值，找到解扩定时的第二电路。

4. 发明授权

US06853631B1 Code-division multiplex communication transmitting apparatus and receiving apparatus and method thereof 失效
标题翻译：码分复用通信发送装置及其接收装置及方法
公开(公告)号：US06853631B1
公开(公告)日：2005-02-08
申请号：US09415997
申请日：1999-10-12
申请人： Michiharu Nakamura , Hajime Hamada , Yasuyuki Oishi , Kazuo Nagatani
发明人： Michiharu Nakamura , Hajime Hamada , Yasuyuki Oishi , Kazuo Nagatani
IPC分类号： H04L27/18 , H04B1/707 , H04J13/00 , H04L27/34 , H04B7/216
CPC分类号： H04J13/0003 , H04B1/707 , H04B2201/70701 , H04L27/34
摘要： A phase θI1, . . . , θQ1, . . . uniquely determined for each channel is assigned to a carrier for each channel used when data I1 . . . , Q1, . . . , to be distributed among different channels are modulated. By appropriately modifying the phase of a carrier for each channel, signal points can be located in a narrower region than in a conventional region, and thereby the difference in amplitude between a signal point with a minimum amplitude and a signal point with a maximum amplitude can be reduced. Thus, the amplitude range of a signal to be covered by an amplifier for transmitting a transmission signal is reduced, and thereby an amplifier with a linearity that is not high can be used for the amplifier. Accordingly, even if the number of signal points increase, there is no need to use a large high-power amplifier, and thereby the small power and small size of the apparatus can be realized.
摘要翻译： A相位θ1，。。，thetaQ1，。。。对于每个信道唯一确定的每个信道被分配给用于数据I1时使用的每个信道的载波。。。，Q1。。。，被分配在不同的信道之间进行调制。通过适当地修改每个通道的载波相位，信号点可以位于比常规区域更窄的区域中，从而具有最小振幅的信号点与具有最大振幅的信号点之间的幅度差可以减少因此，用于传输发送信号的放大器要覆盖的信号的振幅范围被减小，因此放大器可以使用线性度不高的放大器。因此，即使信号点的数量增加，也不需要使用大的大功率放大器，从而能够实现装置的小功率和小型化。

5. 发明授权

US06864839B2 Radio transceiver and method of controlling direction of radio-wave emission 有权
标题翻译：无线电收发机和无线电波发射方向的控制方法
公开(公告)号：US06864839B2
公开(公告)日：2005-03-08
申请号：US10413421
申请日：2003-04-14
申请人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
发明人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
IPC分类号： G01S19/25 , G01S1/38 , G01S3/14 , G01S3/46 , G01S5/02 , H01Q3/26 , H04B7/06 , H04B7/08 , H04B7/10 , H04W16/28 , H04W64/00 , H04W88/02 , H04W88/08 , H04W92/10 , G01S5/04
CPC分类号： H04B7/0617 , G01S1/38 , G01S3/14 , G01S3/46 , G01S5/0226 , H04B7/0626
摘要： Disclosed is a method of controlling direction of radio-wave emission of a base-station transmitter which emits radio waves upon providing the radio waves with directivity in the direction of a receiver. Two antennas of a base station that are disposed at different positions transmit first and second signals that have been spread by mutually orthogonal spreading codes. A mobile station has a phase detector for receiving the first and second signals transmitted from respective ones of the antennas and obtaining a phase difference between these signals, and a direction estimator for calculating the direction of the mobile station, as seen from the base station, based upon the phase difference and for feeding back a signal representing the calculated direction from the mobile station to the base station. The transmitter of the base station transmits data toward the receiver in the calculated direction using a directional antenna.
摘要翻译：公开了一种在向接收机的方向提供无线电波的基站发射机的无线电波发射的方向上发射无线电波的方法。设置在不同位置的基站的两个天线发送已经通过相互正交的扩展码扩展的第一和第二信号。移动站具有相位检测器，用于接收从相应天线发送的第一和第二信号，并获得这些信号之间的相位差，以及用于计算移动站的方向的方向估计器，从基站看，基于相位差，并将表示所计算的方向的信号从移动台反馈到基站。基站的发射机使用定向天线在计算出的方向上向接收机发送数据。

6. 发明授权

US07026991B2 Radio transceiver and method of controlling direction of radio-wave emission 失效
公开(公告)号：US07026991B2
公开(公告)日：2006-04-11
申请号：US10859775
申请日：2004-06-03
申请人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
发明人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
IPC分类号： G01S5/04
CPC分类号： H04B7/0617 , G01S1/38 , G01S3/14 , G01S3/46 , G01S5/0226 , H04B7/0626
摘要： Disclosed is a method of controlling direction of radio-wave emission of a base-station transmitter which emits radio waves upon providing the radio waves with directivity in the direction of a receiver. Two antennas of a base station that are disposed at different positions transmit first and second signals that have been spread by mutually orthogonal spreading codes. A mobile station has a phase detector for receiving the first and second signals transmitted from respective ones of the antennas and obtaining a phase difference between these signals, and a direction estimator for calculating the direction of the mobile station, as seen from the base station, based upon the phase difference and for feeding back a signal representing the calculated direction from the mobile station to the base station. The transmitter of the base station transmits data toward the receiver in the calculated direction using a directional antenna.

7. 发明授权

US07391371B2 Radio transceiver and method of controlling direction of radio-wave emission 有权
标题翻译：无线电收发机和无线电波发射方向的控制方法
公开(公告)号：US07391371B2
公开(公告)日：2008-06-24
申请号：US10827779
申请日：2004-04-20
申请人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
发明人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
IPC分类号： G01S5/04
CPC分类号： H04B7/0617 , G01S1/38 , G01S3/14 , G01S3/46 , G01S5/0226 , H04B7/0626
摘要： Disclosed is a method of controlling direction of radio-wave emission of a base-station transmitter which emits radio waves upon providing the radio waves with directivity in the direction of a receiver. Two antennas of a base station that are disposed at different positions transmit first and second signals that have been spread by mutually orthogonal spreading codes. A mobile station has a phase detector for receiving the first and second signals transmitted from respective ones of the antennas and obtaining a phase difference between these signals, and a direction estimator for calculating the direction of the mobile station, as seen from the base station, based upon the phase difference and for feeding back a signal representing the calculated direction from the mobile station to the base station. The transmitter of the base station transmits data toward the receiver in the calculated direction using a directional antenna.
摘要翻译：公开了一种在向接收机的方向提供无线电波的基站发射机的无线电波发射的方向上发射无线电波的方法。设置在不同位置的基站的两个天线发送已经通过相互正交的扩展码扩展的第一和第二信号。移动站具有相位检测器，用于接收从相应天线发送的第一和第二信号，并获得这些信号之间的相位差，以及用于计算移动站的方向的方向估计器，从基站看，基于相位差，并将表示计算出的方向的信号从移动台反馈到基站。基站的发射机使用定向天线在计算出的方向上向接收机发送数据。

8. 发明授权

US06577273B2 Radio transceiver and method of controlling direction of radio-wave emission 有权
标题翻译：无线电收发机和无线电波发射方向的控制方法
公开(公告)号：US06577273B2
公开(公告)日：2003-06-10
申请号：US09746439
申请日：2000-12-21
申请人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
发明人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
IPC分类号： G01S504
CPC分类号： H04B7/0617 , G01S1/38 , G01S3/14 , G01S3/46 , G01S5/0226 , H04B7/0626
摘要： Disclosed is a method of controlling direction of radio-wave emission of a base-station transmitter which emits radio waves upon providing the radio waves with directivity in the direction of a receiver. Two antennas of a base station that are disposed at different positions transmit first and second signals that have been spread by mutually orthogonal spreading codes. A mobile station has a phase detector for receiving the first and second signals transmitted from respective ones of the antennas and obtaining a phase difference between these signals, and a direction estimator for calculating the direction of the mobile station, as seen from the base station, based upon the phase difference and for feeding back a signal representing the calculated direction from the mobile station to the base station. The transmitter of the base station transmits data toward the receiver in the calculated direction using a directional antenna.
摘要翻译：公开了一种在向接收机的方向提供无线电波的基站发射机的无线电波发射的方向上发射无线电波的方法。设置在不同位置的基站的两个天线发送已经通过相互正交的扩展码扩展的第一和第二信号。移动站具有相位检测器，用于接收从相应天线发送的第一和第二信号，并获得这些信号之间的相位差，以及用于计算移动站的方向的方向估计器，从基站看，基于相位差，并将表示计算出的方向的信号从移动台反馈到基站。基站的发射机使用定向天线在计算出的方向上向接收机发送数据。

9. 发明授权

US07787824B2 Receiver, transmission device and receiving method 有权
标题翻译：接收机，传输设备和接收方式
公开(公告)号：US07787824B2
公开(公告)日：2010-08-31
申请号：US11698050
申请日：2007-01-26
申请人： Wladimir Bocquet , Michiharu Nakamura
发明人： Wladimir Bocquet , Michiharu Nakamura
IPC分类号： H04B7/00 , H04K3/00
CPC分类号： H04B7/086 , H04B7/0413
摘要： An adaptive array antenna part receiving a plurality of transmitted signals in which sub-carrier signal components of predetermined values is suppressed before transmission in order to distinguish a plurality of transmission antenna, by means of the plurality of transmission antennas; a part calculating weight factors suppressing the sub-carrier signal components set in the predetermined values, among sub-carrier components included in a received signal; and a part applying the weight factors to the adaptive array antenna means and receiving the plurality of transmitted signals with distinguishing the same are provided.
摘要翻译：一种自适应阵列天线部分，其接收多个发射信号，其中在传输之前抑制了预定值的副载波信号分量，以便通过所述多个发射天线来区分多个发射天线; 在包括在接收信号中的子载波分量中，计算抑制在预定值中设置的副载波信号分量的权重因子的部分; 并且提供将权重因子应用于自适应阵列天线装置并且接收多个具有区别的发射信号的部分。

10. 发明申请

US20100142436A1 Communication Systems 审中-公开
标题翻译：通讯系统
公开(公告)号：US20100142436A1
公开(公告)日：2010-06-10
申请号：US12649096
申请日：2009-12-29
申请人： Michael John Beems Hart , Yuefeng Zhou , Dorin Viorel , Chenxi Zhu , Michiharu Nakamura , Masahiro Watanabe , Hiroshi Fujita , Makoto Yoshida
发明人： Michael John Beems Hart , Yuefeng Zhou , Dorin Viorel , Chenxi Zhu , Michiharu Nakamura , Masahiro Watanabe , Hiroshi Fujita , Makoto Yoshida
IPC分类号： H04B7/14
CPC分类号： H04W28/16 , H04B7/15507 , H04B7/2606 , H04L5/0007 , H04L5/0032 , H04L5/0048 , H04L25/0226 , H04L27/2655 , H04L27/2692 , H04W48/08 , H04W84/047
摘要： A transmission method for use in a multi-hop wireless communication system is provided. The system includes a source apparatus, a destination apparatus and one or more intermediate apparatuses. The system has access to at least one predetermined transmission introduction sequence and also has access to a time-frequency format for use in assigning available transmission frequency bandwidth during a discrete transmission interval, said format defining a plurality of transmission windows within such an interval. Each window occupies a different part of that interval and has a frequency bandwidth profile within said available transmission frequency bandwidth over its part of that interval. Each said window being assignable for such a transmission interval to at least one of said apparatuses for use in transmission. The method includes, when transmitting a message with a preamble in a particular transmission interval, transmitting the preamble in a first transmission window of that transmission interval. Furthermore, the method includes transmitting the transmission introduction sequence in a second transmission window of that transmission interval other than the first transmission window preferably as control information for use by at least one said intermediate apparatus or the destination apparatus.
摘要翻译：提供了一种用于多跳无线通信系统的传输方法。该系统包括源设备，目的地设备和一个或多个中间设备。该系统可以访问至少一个预定的传输介绍序列，并且还可以访问用于在离散传输间隔期间分配可用传输频率带宽的时间 - 频率格式，所述格式在这样的间隔内定义多个传输窗口。每个窗口占据该间隔的不同部分，并且在该间隔的部分内在所述可用传输频率带宽内具有频带配置。每个所述窗口可分配给用于传输的所述设备中的至少一个的这种传输间隔。该方法包括：在特定发送间隔中发送具有前导码的消息时，在该发送间隔的第一发送窗口中发送前导码。此外，该方法包括：在第一传输窗口之外的传输间隔的第二传输窗口中优选地传输传输介绍序列作为至少一个所述中间设备或目的设备使用的控制信息。

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