公开(公告)号：US07565172B2

公开(公告)日：2009-07-21

申请号：US10560967

申请日：2004-06-23

申请人： Shousei Yoshida

发明人： Shousei Yoshida

IPC分类号： H04M1/00

CPC分类号： H04B7/0854 ,  H01Q3/2605

摘要： An adaptive antenna receiver whose follow-up performance is improved with respect to the angle change of the arrival direction of a desired signal. An antenna weight adaptive update section (11-1) adaptively updates the antenna weight according to a signals received by each antenna element and an error signal obtained from a desired signal corrected based on transmission channel estimation. An antenna weight direction constraint section (12-1) performs the constraint process for the antenna weight obtained by the antenna weight adaptive update section (11-1) to maintain the beam gain constant in the arrival direction of the desired signal. A beamformer (2-1) receives the desired signal through an array antenna using the antenna weight which has undergone the constraint process performed by the antenna weight direction constraint section (12-1). A transmission channel estimation section (3-1) estimates the transmission channel of the desired signal received by the beamformer (2-1) to correct the desired signal based on the estimation result.

摘要翻译： 一种自适应天线接收机，其相对于期望信号的到达方向的角度变化而改进后续性能。 天线权重自适应更新部分（11-1）根据由每个天线元件接收的信号和从基于传输信道估计校正的期望信号获得的误差信号自适应地更新天线权重。 天线权重方向约束部分（12-1）对由天线权重自适应更新部分（11-1）获得的天线权重进行约束处理，以使波束增益在期望信号的到达方向上保持恒定。 波束形成器（2-1）使用经过天线权重方向约束部分（12-1）进行的约束处理的天线权重，通过阵列天线接收期望的信号。 发送信道估计部（3-1）基于估计结果来估计由波束形成器（2-1）接收到的期望信号的传输信道，以校正所希望的信号。

公开(公告)号：US20090168910A1

公开(公告)日：2009-07-02

申请号：US12343258

申请日：2008-12-23

申请人： YASUNORI FUTATSUGI ,  Shousei Yoshida

发明人： YASUNORI FUTATSUGI ,  Shousei Yoshida

IPC分类号： H04L27/28 ,  H04L25/03 ,  H04B1/10

CPC分类号： H04L5/0007 ,  H04L1/005 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0064 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0236 ,  H04L25/03159 ,  H04L25/03286 ,  H04L25/03292 ,  H04L25/03331 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/2604 ,  H04L27/3488 ,  H04L2025/03414 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03522 ,  H04L2025/03611

摘要： A transmitting device according to the present invention comprises: a coding unit which encodes a transmission information bit string to a code bit string; a low-order modulating unit which conducts low-order modulation on the code bit string outputted from the encoding unit; a first frequency domain converting unit which converts the low-order modulated signal outputted from the low-order modulating unit to a frequency domain signal; a partial spectrum selecting unit which selects a central 1/M portion (M is an integer greater than or equal to two) of a spectrum from the frequency spectrum outputted from the first frequency domain converting unit; and a first time domain converting unit which converts the spectrum selected signal outputted from the partial spectrum selecting unit to a time domain signal.

摘要翻译： 根据本发明的发送设备包括：编码单元，其将发送信息位串编码为码位串; 对从编码单元输出的码位串进行低阶调制的低阶调制单元; 第一频域转换单元，将从低阶调制单元输出的低阶调制信号转换为频域信号; 部分频谱选择单元，从从第一频域转换单元输出的频谱中选择频谱的中心1 / M部分（M是大于或等于2的整数）; 以及第一时域转换单元，其将从部分频谱选择单元输出的频谱选择信号转换为时域信号。

公开(公告)号：US07324470B2

公开(公告)日：2008-01-29

申请号：US09957871

申请日：2001-09-21

申请人： Shousei Yoshida ,  Akihisa Ushirokawa

发明人： Shousei Yoshida ,  Akihisa Ushirokawa

IPC分类号： H04B7/185 ,  H04B7/216 ,  H04B17/02

CPC分类号： H04W52/42 ,  H04B1/707 ,  H04B1/7097 ,  H04B7/061 ,  H04B7/0615 ,  H04B7/0634 ,  H04B7/0671 ,  H04B7/0689 ,  H04B7/2628

摘要： An FDD/CDMA transmission/reception system includes a CDMA transmitter and a CDMA receiver. The CDMA transmitter includes a plurality of transmission antennas, signal transmission units for transmitting transmission signals weighted by different values to the respective transmission antennas, and pilot signal transmission units for transmitting a plurality of different pilot signals to the respective transmission antennas. The CDMA receiver includes a reception unit for obtaining one received signal from the transmission signals from the plurality of transmission antennas of the CDMA transmitter in consideration of reception quality, and a unit for transmitting antenna control signals corresponding to reception power values of the received pilot signals to the CDMA transmitter.

摘要翻译： FDD / CDMA发送/接收系统包括CDMA发射机和CDMA接收机。 CDMA发射机包括多个发射天线，用于将由不同值加权的传输信号发射到各个发射天线的信号传输单元，以及用于将多个不同导频信号发射到各个发射天线的导频信号传输单元。 考虑到接收质量，CDMA接收机包括用于从CDMA发射机的多个发送天线的发送信号中获得一个接收信号的接收单元，以及用于发送对应于接收到的导频信号的接收功率值的天线控制信号的单元 到CDMA发射机。

公开(公告)号：US20060245477A1

公开(公告)日：2006-11-02

申请号：US11410026

申请日：2006-04-25

申请人： Shousei Yoshida

发明人： Shousei Yoshida

IPC分类号： H04B1/707 ,  H04K1/10

CPC分类号： H04B1/7097

摘要： In an arrangement for receiving CDMA signals, insertion of guard intervals is rendered unnecessary and transmission efficiency loss is suppressed, along with greatly reducing the computational burden of weight calculations. Impulse responses of a transmission channel are obtained by time-domain signal processing, the impulse responses are Fourier transformed and converted into frequency domain signals, equalizing filter weights are calculated using the frequency domain impulse responses, the calculated frequency domain weights are converted to time domain weights using an inverse Fourier transform, the received signals are filtered using time-domain signal processing, and data signals are demodulated by despreading the equalized signals.

摘要翻译： 在接收CDMA信号的布置中，不需要插入保护间隔，并且抑制传输效率损失，同时大大减少了权重计算的计算负担。 通过时域信号处理获得传输信道的脉冲响应，将脉冲响应进行傅立叶变换并转换为频域信号，使用频域脉冲响应计算均衡滤波器权重，将计算的频域权重​​转换为时域 使用逆傅里叶变换的权重，使用时域信号处理对接收到的信号进行滤波，并且通过解扩均衡信号来解调数据信号。

公开(公告)号：US20050181832A1

公开(公告)日：2005-08-18

申请号：US10510453

申请日：2003-04-03

申请人： Naoto Ishii ,  Shousei Yoshida ,  Kojiro Hamabe

发明人： Naoto Ishii ,  Shousei Yoshida ,  Kojiro Hamabe

IPC分类号： H04L1/00 ,  H04L1/20 ,  H04W36/06 ,  H04W36/30 ,  H04Q7/20

CPC分类号： H04W36/06 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/20 ,  H04W36/30

摘要： A mobile communication system capable of improving the system throughput. A base station (1) divides one cell into three sectors. A common pilot channel is transmitted to a plurality of mobile stations in the sectors by beams (101-103) whose directivity is controlled by an adaptive antenna for each of the sectors. On the other hand, when a mobile station (2) communicates data with the base station (1), the base station transmits a data channel and an individual control channel to the mobile station (2) by using a beam (201) whose directivity is controlled individually. The mobile station (2) switches between the common pilot channel and the individual control channel from the base station (1) for estimating the communication path quality.

摘要翻译： 一种能够提高系统吞吐量的移动通信系统。 基站（1）将一个小区划分为三个扇区。 公共导频信道通过波束（101-103）向扇区中的多个移动台发送，其方向性由每个扇区的自适应天线控制。 另一方面，当移动站（2）与基站（1）通信数据时，基站通过使用其指向性的波束（201）向移动台（2）发送数据信道和单独的控制信道 被单独控制。 移动站（2）在公共导频信道和来自基站（1）的单独控制信道之间切换以估计通信路径质量。

公开(公告)号：US06714584B1

公开(公告)日：2004-03-30

申请号：US09286416

申请日：1999-04-06

申请人： Naoto Ishii ,  Shousei Yoshida ,  Akihisa Ushirokawa

发明人： Naoto Ishii ,  Shousei Yoshida ,  Akihisa Ushirokawa

IPC分类号： H04B1500

CPC分类号： H04B7/0897 ,  H04B7/0408 ,  H04B7/086

摘要： A CDMA adaptive antenna receiving apparatus is provided with plural receivers of which each is for receiving one or more of desired signal components incoming at the same time. Each of the plural receivers includes plural adaptive receiving units for updating sequentially a directivity in accordance with one desired signal component. The plural adaptive receiving units which are included in the same receiver employ a symbol decision error of the same receiver in common. Each receiver further includes a means for detecting the incoming directions of the plural desired signal components and a means for controlling directivities of the plural adaptive receiving units in accordance with the incoming directions of the plural desired signal components and directivities of the plural adaptive receiving units.

摘要翻译： CDMA自适应天线接收装置设置有多个接收机，每个接收机各自用于接收一个或多个同时进入的所需信号分量。 多个接收机中的每一个包括用于根据一个期望的信号分量依次更新方向性的多个自适应接收单元。 包含在同一接收机中的多个自适应接收单元共同使用相同接收机的符号判定误差。 每个接收机还包括用于检测多个期望信号分量的输入方向的装置，以及用于根据多个所需信号分量的输入方向和多个自适应接收单元的方向性来控制多个自适应接收单元的方向性的装置。

公开(公告)号：US06492958B2

公开(公告)日：2002-12-10

申请号：US09935798

申请日：2001-08-24

申请人： Shousei Yoshida

发明人： Shousei Yoshida

IPC分类号： H01Q2300

CPC分类号： H01Q3/2605 ,  H04B7/086

摘要： An adaptive antenna reception apparatus includes a reference signal level determination section, reception level detection sections, and beam formers. The reference signal level determination section determines the level of a reference signal for generating an error signal used for antenna adaptive control on the basis of a reception level of each antenna before beam forming. The reception level detection sections calculate antenna weighting factors for the respective paths on the basis of the multiplex signals received through the respective antennas and the error signal output from the reference signal level determination section. The beam formers receive the received multiplex signals and form antenna directivity beams for the respective paths in accordance with the antenna weighting factors output from the reception level detection sections.

公开(公告)号：US06208683B1

公开(公告)日：2001-03-27

申请号：US09095102

申请日：1998-06-10

申请人： Hironori Mizuguchi ,  Shousei Yoshida ,  Akihisa Ushirokawa

发明人： Hironori Mizuguchi ,  Shousei Yoshida ,  Akihisa Ushirokawa

IPC分类号： H04L2730

CPC分类号： H04B1/7097

摘要： In a direct sequence/code division multiple access (DS/CDMA) type interference canceller receiving apparatus having a delaying unit for delaying a reception signal into zeroth through (N−1)-th delayed signals, zeroth through (N−1)-th path receivers for demodulating the zeroth thorough the (N−1)-th delayed signals into zeroth through (N−1)-th demodulated signals, and a combining unit for combining the zeroth through the (N−1)-th demodulated signals into a combined signal, an n-th path receivers includes an n-th follow-up path detection unit for detecting an n-th follow-up path for the n-th path receiver on the basis of a peculiar spread code in response to an n-th coefficient control signal. The n-th follow-up path detection unit produces n-th follow-up path information indicative of the n-th follow-up path. A follow-up path control unit controls path reception timings for the zeroth through the (N−1)-th path receivers on the basis of searched path information supplied from a multi-path searcher and zeroth through the (N−1)-th follow-up path information. The follow-up path control unit supplies the delaying unit with a path reception timing signal indicative of first through (N−1)-th delay amounts for first through (N−1)-th delay circuits in the delaying unit.

摘要翻译： 在具有用于将接收信号延迟到第（N-1）个延迟信号的延迟单元的直接序列/码分多址（DS / CDMA）型干扰消除器接收装置中，第零到第（N-1） 路径接收器，用于将第（N-1）个第（N-1）个延迟信号的第零完全解调为第（N-1）个解调信号，以及组合单元，用于将第（N-1）个解调信号 组合信号，第n路径接收机包括第n跟踪路径检测单元，用于响应于第n路径接收机的特殊扩展码，检测第n路径接收机的第n次跟踪路径 第n个系数控制信号。 第n次跟踪路径检测单元产生指示第n次跟随路径的第n个后续路径信息。 后续路径控制单元通过第（N-1）路径接收机根据从多路径搜索器提供的搜索到的路径信息和第（N-1）路径信息来控制第零级的路径接收定时 后续路径信息。 后续路径控制单元向延迟单元提供指示延迟单元中的第一到第（N-1）个延迟电路的第一到第（N-1）个延迟量的路径接收定时信号。

公开(公告)号：US5049830A

公开(公告)日：1991-09-17

申请号：US581892

申请日：1990-09-13

申请人： Shousei Yoshida

发明人： Shousei Yoshida

IPC分类号： H04L27/227

CPC分类号： H04L27/2276

摘要： A carrier recovery system combining a narrow band carrier phase estimator and a wide band carrier phase estimator, and a digital phase demodulator using this carrier recovery system. The narrow band carrier phase estimator extracts a carrier phase having a low pulse slip rate from received signal. This carrier phase, however, cannot track fast phase fluctuation due to fading. On the other hand, the wide band carrier phase estimator tracks fast phase fluctuation due to fading, and extracts a carrier phase from the received signal. From this carrier phase is subtracted the other carrier phase obtained by the narrow band carrier phase estimator, and the balance, after its fluctuating range is limited, is added to the carrier phase obtained by the narrow band carrier phase estimator, thereby making it possible to obtain a carrier phase which can track fast phase fluctuations due to fading without sacrificing the phase slip rate. By using the carrier phase obtained in this manner, there can be structured a digital phase demodulator suitable for mobile communication systems based on coherent detection. If carrier component is extracted by reversely modulating the received signal with reference signal obtained by subjecting to decision the signal demodulated by this digital phase demodulator, a carrier phase is recovered by filtering the extracted carrier component in a wide band, and the received signal is synchronously detected with this carrier phase, the error rate can be further reduced.

摘要翻译： 组合窄带载波相位估计器和宽带载波相位估计器的载波恢复系统，以及使用该载波恢复系统的数字相位解调器。 窄带载波相位估计器从接收信号中提取具有低脉冲滑移率的载波相位。 然而，该载波相位不能跟踪由于衰落引起的快速相位波动。 另一方面，宽带载波相位估计器跟踪由于衰落引起的快速相位波动，并从接收信号中提取载波相位。 从该载波相位减去由窄带载波相位估计器获得的另一个载波相位，并且在其波动范围受限之后的平衡被加到由窄带载波相位估计器获得的载波相位上，从而使得可以 获得可以跟踪由于衰落而导致的快速相位波动而不牺牲相位滑移率的载波相位。 通过使用以这种方式获得的载波相位，可以构造适合于基于相干检测的移动通信系统的数字相位解调器。 如果通过对通过对由该数字相位解调器解调的信号进行判定而获得的参考信号对接收信号进行反向调制来提取载波分量，则通过对宽带中提取的载波分量进行滤波来恢复载波相位，并且接收信号是同步的 利用该载波相检测，可以进一步降低误码率。

公开(公告)号：US20090323796A1

公开(公告)日：2009-12-31

申请号：US12457839

申请日：2009-06-23

申请人： Yasunori Futatsugi ,  Shousei Yoshida

发明人： Yasunori Futatsugi ,  Shousei Yoshida

IPC分类号： H04B15/00 ,  H04B1/10 ,  H04L27/01

CPC分类号： H04L25/03159 ,  H04L1/0054 ,  H04L25/0224 ,  H04L25/03171 ,  H04L25/03828 ,  H04L25/497

摘要： A radio communication device for receiving a single-carrier signal transmitted in a partial spectrum of Nyquist frequency band, includes: an interference eliminator for eliminating interference from a received signal by spectrum reproduction of non-transmitted spectra using a symbol replica, to output an interference eliminated signal, wherein the interference includes intersymbol interference which is caused by symbols which are more than a predetermined distance away from a decision symbol point; a symbol sequence estimator for estimating a transmission symbol sequence by separating nearby intersymbol interference within the predetermined distance of the decision symbol point based on the interference eliminated signal, to output a decision signal; and a replica generator for generating the symbol replica from decoding result of the decision signal, wherein the symbol replica is fed back to the frequency-domain interference eliminator.

摘要翻译： 一种用于接收在奈奎斯特频带的部分频谱中发射的单载波信号的无线电通信装置，包括：干扰消除器，用于通过使用符号副本的非发射频谱的频谱再现来消除来自接收信号的干扰，以输出干扰 消除信号，其中所述干扰包括由距离判定符号点大于预定距离的符号引起的符号间干扰; 符号序列估计器，用于基于所述干扰消除信号，在所述判定符号点的预定距离内分离附近的符号间干扰来估计发送符号序列，以输出判定信号; 以及副本生成器，用于从判定信号的解码结果生成符号副本，其中符号副本被反馈到频域干扰消除器。