公开(公告)号：US5687162A

公开(公告)日：1997-11-11

申请号：US513428

申请日：1995-08-10

申请人： Shousei Yoshida ,  Akihisa Ushirokawa

发明人： Shousei Yoshida ,  Akihisa Ushirokawa

IPC分类号： H03H21/00 ,  H03H15/00 ,  H03H17/00 ,  H04B1/7103 ,  H04B3/04 ,  H04B7/08 ,  H04J13/00 ,  H04B7/216 ,  H04J13/02

CPC分类号： H04B1/7097 ,  H04B7/0845

摘要： In a DS/CDMA receiver, each of first and second receiving units (211 and 221) receives a DS/CDMA signal as a received signal. First and second adaptive interference cancellers (212+213, 222+223) are connected to the first and the second receiving units, respectively. Each of the adaptive interference cancellers cancels an interference on the received signal. Connected to the first and the second receiving units and to the first and the second adaptive interference cancellers, a single interference canceller control circuit (204) controls the first and the second adaptive interference cancellers in common. An all output combiner (201) combines all of output signals of the first and the second adaptive interference cancellers. Preferably, each of the adaptive interference cancellers has an adaptive filter (212 or 222) to cancel the interference with respect to all other stations by adaptively making its tap coefficients orthogonal to spreading codes of the all other stations. Each of the adaptive interference cancellers further has a differential detection circuit (213 or 223) to compensate for phase fluctuation of an output signal of the adaptive filter. The single interference canceller control circuit may control the adaptive interference cancellers in common on the basis of best quality control information relating to one of the received signals of the first and the second receiving units that has a best signal quality.

摘要翻译： 在DS / CDMA接收机中，第一和第二接收单元（211和221）中的每一个接收DS / CDMA信号作为接收信号。 第一和第二自适应干扰消除器（212 + 213,222 + 223）分别连接到第一和第二接收单元。 每个自适应干扰消除器消除对接收信号的干扰。 连接到第一和第二接收单元以及第一和第二自适应干扰消除器，单个干扰消除器控制电路（204）共同地控制第一和第二自适应干扰消除器。 全输出组合器（201）组合第一和第二自适应干扰消除器的所有输出信号。 优选地，每个自适应干扰消除器具有自适应滤波器（212或222），以通过自适应地使其抽头系数与所有其他站的扩展码正交来消除相对于所有其他站的干扰。 每个自适应干扰消除器还具有补偿自适应滤波器的输出信号的相位波动的差分检测电路（213或223）。 单个干扰消除器控制电路可以基于与具有最佳信号质量的第一和第二接收单元的接收信号之一相关的最佳质量控制信息来共同地控制自适应干扰消除器。

公开(公告)号：US5170415A

公开(公告)日：1992-12-08

申请号：US537354

申请日：1990-06-13

申请人： Shousei Yoshida ,  Hizuru Nawata

发明人： Shousei Yoshida ,  Hizuru Nawata

IPC分类号： H04L7/04 ,  H04L27/38

CPC分类号： H04L27/3872 ,  H04L7/046

摘要： In a burst demodulator, an APSK burst signal containing a preamble of alternating "1" and "-1" symbols, followed by a data field is received and quasi-coherently demodualted into a baseband complex signal, which is converted to digital form such that each symbol of the complex signal yields N digital samples, with N being selected such that at least one of the N digital samples is closest to a signal point of the burst signal. A clock recovery circuit is responsive to the arrival of the burst for estimating the symbol timing of the burst signal from digital samples of the preamble. A digital sample is extracted from every N samples of the preamble in response to the estimated symbol timing so that it is most likely to be closest to the signal point. A carrier recovery circuit responds to the estimated symbol timing by estimating the carrier frequency and phase of the burst signal from the extracted digital samples to produce a complex carrier signal, which is multiplied with the extracted digital samples to recover the original signal. Memories are preferably provided to store the received burst signal. By repeatedly reading the preamble from the memories, the same symbols of the preamble can be used for clock timing and carrier phase recovery operations.

摘要翻译： 在脉冲串解调器中，接收包含交替的“1”和“-1”符号的前导码的APSK突发信号，随后是数据字段，并被准相干解调成基带复合信号，其被转换成数字形式，使得 复信号的每个符号产生N个数字样本，其中N被选择为使得N个数字样本中的至少一个最接近于突发信号的信号点。 时钟恢复电路响应于用于从前同步码的数字样本估计突发信号的符号定时的脉冲串的到达。 响应于估计的符号定时，从前导码的每个N个样本中提取数字样本，使得其最可能最接近信号点。 载波恢复电路通过从提取的数字样本估计突发信号的载波频率和相位来产生复载波信号来响应估计的符号定时，该复载波信号与所提取的数字样本相乘以恢复原始信号。 优选地提供存储器以存储所接收的突发信号。 通过从存储器重复读取前同步码，可以将前置码的相同符号用于时钟定时和载波相位恢复操作。

公开(公告)号：US4835790A

公开(公告)日：1989-05-30

申请号：US210657

申请日：1988-06-23

申请人： Shousei Yoshida ,  Susumu Otani ,  Toshiya Todoroki

发明人： Shousei Yoshida ,  Susumu Otani ,  Toshiya Todoroki

IPC分类号： G01R29/26 ,  H04B17/00 ,  H04L27/00 ,  H04L27/227

CPC分类号： H04L27/2273 ,  G01R29/26 ,  H04B17/20 ,  H04L2027/0016 ,  H04L2027/0067 ,  H04L2027/0075

摘要： A carrier-to-noise detector comprises an A/D converter (1) which samples an output of the demodulator of a digital transmission system at a symbol clock rate and converting it to a digital signal having positive and negative values. An absolute value converting circuit (2) converts the output of A/D converter into an absolute value which is averaged by a first averaging circuit (3) over a period sufficient to suppress short term variations and then squared by a first squaring circuit (4) to give an output representing the carrier component. The output of A/D converter is, on the other hand, squared by a second squaring circuit (5) and averaged by a second averaging circuit (6) to suppress short term variations to give an output representing a total of the carrier and noise components. The carrier component in the output of the second averaging circuit 6 is subtracted by a subtractor (7). A ratio between the outputs of the first squaring circuit (4) and subtracting circuit (7) is derived by a divider (8) as a representation of a carrier-to-noise ratio.

摘要翻译： 载波噪声检测器包括A / D转换器（1），其以符号时钟速率对数字传输系统的解调器的输出进行采样，并将其转换为具有正值和负值的数字信号。 绝对值转换电路（2）将A / D转换器的输出转换为绝对值，该绝对值由第一平均电路（3）在足以抑制短期变化的时间内平均，然后由第一平方电路（4 ）来给出表示载波分量的输出。 另一方面，A / D转换器的输出由第二平方电路（5）平方并由第二平均电路（6）平均，以抑制短期变化，从而给出表示载波和噪声的总和的输出 组件。 第二平均电路6的输出中的载波分量由减法器（7）减去。 第一平方电路（4）和减法电路（7）的输出之间的比值由分频器（8）导出为载波噪声比的表示。

公开(公告)号：US08265675B2

公开(公告)日：2012-09-11

申请号：US12098917

申请日：2008-04-07

申请人： Mariko Matsumoto ,  Shousei Yoshida

发明人： Mariko Matsumoto ,  Shousei Yoshida

IPC分类号： H04B7/00

CPC分类号： H04B7/0413 ,  H04W36/18 ,  H04W36/30

摘要： A MIMO wireless communication system capable of relaxing a reduction in a transmission rate on a cell end far from a base station and ensuring a high transmission rate for a mobile station, irrespectively of a distance from the base station is provided.In a state 1, the mobile station 21 checks a propagation line quality and instructs only the first base station 11 to transmit data to the mobile station 21. In a state 2, the mobile station 21 issues a request to divide the data to the first base station 11 and the second base station 12 and to transmit the divided data to the mobile station 21, and holds MIMO communication with the two base stations.In a state 3, the mobile station 21 requests only the second base station 12 to transmit the data and communicates with the second base station 12.

摘要翻译： 提供了一种MIMO无线通信系统，其能够在远离基站的小区端部放宽传输速率的降低，并且确保移动站的高传输速率，而与基站的距离无关。 在状态1中，移动台21检查传播线路质量，仅指示第一基站11向移动台21发送数据。在状态2中，移动台21发出将数据划分到第一 基站11和第二基站12，并将划分的数据发送到移动台21，并与两个基站保持MIMO通信。 在状态3中，移动台21仅请求第二基站12发送数据并与第二基站12进行通信。

公开(公告)号：US07961800B2

公开(公告)日：2011-06-14

申请号：US12066128

申请日：2006-06-30

申请人： Shousei Yoshida

发明人： Shousei Yoshida

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L1/0003 ,  H04L1/0026 ,  H04L27/2627

摘要： Adaptive modulation part (1) modulates a signal in a modulation scheme selected based on a modulation mode, switch (2) selects a radio scheme congenial to the modulation scheme in which the signal is modulated. When the selected radio scheme is single-carrier scheme, single-carrier generation part (3) generates a single-carrier signal. When the selected radio scheme is a multicarrier scheme, multicarrier generation part (4) generates a multicarrier signal, the generated single-carrier signal or multicarrier signal is converted into a carrier band signal by quadrature modulation part (5), and the converted signal is amplified by transmission amplifier (6).

摘要翻译： 自适应调制部分（1）调制基于调制模式选择的调制方案中的信号，开关（2）选择与其中调制信号的调制方案相适应的无线电方案。 当选择的无线电方案是单载波方案时，单载波生成部分（3）产生单载波信号。 当所选择的无线电方案是多载波方案时，多载波发生部分（4）产生多载波信号，所产生的单载波信号或多载波信号由正交调制部分（5）转换成载波信号，转换后的信号为 由发射放大器（6）放大。

公开(公告)号：US07773687B2

公开(公告)日：2010-08-10

申请号：US10588386

申请日：2005-02-02

申请人： Shousei Yoshida

发明人： Shousei Yoshida

IPC分类号： H04B15/00

CPC分类号： H04L1/0021 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0016 ,  H04L1/0026

摘要： A wireless apparatus 1 receives reception quality information, propagation environment information, and block error rate detection information from a wireless apparatus of the other end of communication together with a data signal, and the target error rate selecting unit 7 selects any one of a plurality of tables in which target block error rates of respective ones of a plurality of transmission modes are registered in accordance with propagation environment information. The threshold value control unit 8 controls the threshold value of the reception quality to select the transmission mode by the control amount on the basis of the target block error rate in accordance with error rate detection information. The transmission mode selecting unit 9 compares reception quality information with the threshold value, selects any one of the transmission modes, and makes the selected one into the transmission mode to the wireless apparatus of the other end of communication.

摘要翻译： 无线装置1从数据信号的另一端的无线装置接收接收质量信息，传播环境信息和块错误率检测信息，目标错误率选择部7选择多个 根据传播环境信息登记多个传输模式中的各个传输模式的目标块错误率的表。 阈值控制单元8根据错误率检测信息，根据目标块错误率，控制接收质量的阈值，以选择发送模式的控制量。 传输模式选择单元9将接收质量信息与阈值进行比较，选择传输模式中的任何一种，并将所选择的一个传送到传输模式，使其连接到另一端的无线设备。

公开(公告)号：US20090232194A1

公开(公告)日：2009-09-17

申请号：US12066128

申请日：2006-06-30

申请人： Shousei Yoshida

发明人： Shousei Yoshida

IPC分类号： H04L27/36 ,  H04B17/00

CPC分类号： H04L1/0003 ,  H04L1/0026 ,  H04L27/2627

摘要： Adaptive modulation part (1) modulates a signal in a modulation scheme selected based on a modulation mode, switch (2) selects a radio scheme congenial to the modulation scheme in which the signal is modulated. When the selected radio scheme is single-carrier scheme, single-carrier generation part (3) generates a single-carrier signal. When the selected radio scheme is a multicarrier scheme, multicarrier generation part (4) generates a multicarrier signal, the generated single-carrier signal or multicarrier signal is converted into a carrier band signal by quadrature modulation part (5), and the converted signal is amplified by transmission amplifier (6).

摘要翻译： 自适应调制部分（1）调制基于调制模式选择的调制方案中的信号，开关（2）选择与其中调制信号的调制方案相适应的无线电方案。 当选择的无线电方案是单载波方案时，单载波生成部分（3）产生单载波信号。 当所选择的无线电方案是多载波方案时，多载波发生部分（4）产生多载波信号，所产生的单载波信号或多载波信号由正交调制部分（5）转换成载波信号，转换后的信号为 由发射放大器（6）放大。

公开(公告)号：US07565114B2

公开(公告)日：2009-07-21

申请号：US10564552

申请日：2004-07-16

申请人： Takumi Ito ,  Shousei Yoshida

发明人： Takumi Ito ,  Shousei Yoshida

IPC分类号： H04B1/00 ,  H04B7/00

CPC分类号： H04B7/0619 ,  H04L1/0001

摘要： An SINR estimating unit of a receiver apparatus measures first and second demodulated signals to calculate SINR (ratio of signal power to sum of interference power and noise power) for each signal sequence. A transmission parameter deciding unit decides, based on the SINR, a transmission parameter used by a transmitter apparatus for controlling the transmission for each signal sequence, and then feeds the decided transmission parameter back to the transmitter apparatus. First and second mapping units of the transmitter apparatus controls, based on the transmission parameters as fed back, the modulation level for each signal sequence.

摘要翻译： 接收机装置的SINR估计单元测量第一和第二解调信号，以计算每个信号序列的SINR（信号功率与干扰功率与噪声功率之和的比值）。 传输参数决定单元基于SINR确定由发送装置使用的用于控制每个信号序列的发送的发送参数，然后将所确定的发送参数反馈给发送装置。 发射机装置的第一和第二映射单元基于反馈的传输参数来控制每个信号序列的调制级别。

公开(公告)号：US07363057B2

公开(公告)日：2008-04-22

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： H04M1/00 ,  H04B1/38 ,  H04B15/00 ,  H04B17/00 ,  H04H1/00

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，当移动台（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：US07203178B2

公开(公告)日：2007-04-10

申请号：US10162194

申请日：2002-06-05

申请人： Naoto Ishii ,  Shousei Yoshida

发明人： Naoto Ishii ,  Shousei Yoshida

IPC分类号： H04B3/23 ,  H04B7/216

CPC分类号： H04B7/0897 ,  H04B1/71075

摘要： A multiuser interference elimination apparatus in which, even in the second and other subsequent stages, adaptive updating of antenna weights can be performed and antenna weights can be generated with accuracy by using interference-canceled received signals. A multiplier performs gain correction by multiplying a symbol replica transmitted from the preceding stage by a coefficient [1−(1−α)m−1], and an antenna signal regeneration section converts the gain-corrected symbol replica into antenna signals. Adders add the antenna signals converted by the antenna signal regeneration section to outputs from despread devices and output the addition results to an antenna weight adaptive updating section. The antenna weight adaptive updating section performs adaptive updating of antenna weights by using the addition results.

摘要翻译： 一种多用户干扰消除装置，其中即使在第二和其它后续阶段中，可以执行天线权重的自适应更新，并且可以通过使用干扰消除的接收信号来精确地生成天线权重。 乘法器通过将从前一级发送的符号复制品乘以系数[1-（1-α） m-1]来执行增益校正，并且天线信号再生部分将经增益校正的符号 复制到天线信号。 加法器将由天线信号再生部分转换的天线信号添加到解扩设备的输出，并将加法结果输出到天线权重自适应更新部分。 天线权重自适应更新部分通过使用相加结果来执行天线权重的自适应更新。