专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07386057B2 Iterative soft interference cancellation and filtering for spectrally efficient high-speed transmission in MIMO systems 有权
标题翻译：迭代软干扰消除和滤波用于MIMO系统中的频谱高效率高速传输
公开(公告)号：US07386057B2
公开(公告)日：2008-06-10
申请号：US10371667
申请日：2003-02-20
申请人： Takumi Ito , Xiaodong Wang
发明人： Takumi Ito , Xiaodong Wang
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04L1/005 , H04L1/0066
摘要： Canceling interference in a multi-input multi-output (MIMO) system is accomplished with a plurality of interference cancellers. Each interference canceller outputs an interference-cancelled received version of its corresponding transmitted signal. An estimate of the transmitted signals from all transmitting antennae is used in each interference canceller. Each estimate is multiplied by a channel coefficient matrix, which can be derived from the communication of known pilot symbols, and the resulting products of each estimate and the channel coefficient matrix are subtracted from the received signals, resulting in a corresponding difference. Each corresponding difference may be multiplied by a filter weight vector. The received signal is decoded based upon the resulting products If a predetermined interrupt criteria is not met, then the decoded signal is used in the preparation of the estimate for a subsequent interference cancellation iteration. The method can be iteratively performed until the predetermined interrupt criteria is met.
摘要翻译：在多输入多输出（MIMO）系统中取消干扰是用多个干扰消除器实现的。每个干扰消除器输出其对应的发送信号的干扰消除接收版本。在每个干扰消除器中使用来自所有发射天线的传输信号的估计。每个估计乘以可以从已知导频符号的通信导出的信道系数矩阵，并且从接收到的信号中减去每个估计和信道系数矩阵的结果乘积，从而产生相应的差异。每个相应的差值可以乘以滤波器权重向量。接收到的信号根据所得到的乘积进行解码。如果不满足预定的中断标准，则在编制用于随后的干扰消除迭代的估计中使用解码信号。可以迭代地执行该方法，直到满足预定的中断标准。

2. 发明授权

US07936838B2 Wireless communication system, receiving apparatus, modulating method for use therein, and program therefor 有权
标题翻译：无线通信系统，接收装置，其中使用的调制方法及其程序
公开(公告)号：US07936838B2
公开(公告)日：2011-05-03
申请号：US10589460
申请日：2005-02-14
申请人： Takumi Ito , Shousei Yoshida , Yoshikazu Kakura , Hiroyuki Seki , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
发明人： Takumi Ito , Shousei Yoshida , Yoshikazu Kakura , Hiroyuki Seki , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
IPC分类号： H04B7/02
CPC分类号： H04L1/06 , H04B7/0854
摘要： It is an object to provide a receiving apparatus which is capable of demodulating signals with a very simple arrangement. Receiving apparatus 1 has N reception antennas 11-1-11-N, and reception antennas 11-1-11-N receive signals. Channel coefficient estimator 12 estimates and outputs channel coefficients from the signals received by respective reception antennas 11-1-11-N. QR decomposer 13 is supplied with a channel matrix having the channel coefficients as its elements, performs QR decomposition on the channel matrix, and outputs a Q matrix and an R matrix. A QH processor 14 is supplied with the Q matrix and the received signals, multiplies the received signals by a complex conjugate transposed matrix of the Q matrix, and outputs converted signal z. A transmitted sequence estimator 15 is supplied with converted signal z and the R matrix and estimates transmitted sequences.
摘要翻译：本发明的目的是提供一种能够以非常简单的布置解调信号的接收装置。接收装置1具有N个接收天线11-1-11-N，接收天线11-1-11-N接收信号。信道系数估计器12从由各个接收天线11-1-11-N接收的信号估计和输出信道系数。 QR分解器13被提供有以通道系数作为其元件的通道矩阵，在通道矩阵上执行QR分解，并且输出Q矩阵和R矩阵。 Q Q处理器14被提供有Q矩阵和接收的信号，将接收的信号乘以Q矩阵的复共轭转置矩阵，并输出转换的信号z。向发送序列估计器15提供转换的信号z和R矩阵并估计发送的序列。

3. 发明授权

US07822132B2 OFDM communication system 有权
标题翻译： OFDM通信系统
公开(公告)号：US07822132B2
公开(公告)日：2010-10-26
申请号：US11718510
申请日：2005-10-31
申请人： Hisashi Futaki , Yoshikazu Kakura , Shousei Yoshida , Takumi Ito
发明人： Hisashi Futaki , Yoshikazu Kakura , Shousei Yoshida , Takumi Ito
IPC分类号： H04K1/10
CPC分类号： H04L5/0094 , H04L5/0007 , H04L5/0046
摘要： N sub-carriers are grouped in units of predetermined quantities in order beginning with the one exhibiting the highest communication channel quality to generate an optimal group pattern on the reception side. Then, communication channel information is calculated for each of sub-carrier groups in the optimal group pattern or a quasi-optimal group pattern which is assumed to be closest to the optimal group pattern among a plurality of previously set group pattern candidates. Communication channel information is designated as modified communication channel information. Grouping information indicative of the optimal group pattern or quasi-optimal group pattern is combined with modified communication channel information to generate feedback information. On the transmission side, sub-carriers are grouped based on reproduced feedback information reproduced from the feedback information.
摘要翻译： N个子载波以预定量的单位被分组，从具有最高通信信道质量的一个开始，以在接收侧生成最佳组模式。然后，针对多个先前设定的组模式候选中的最佳组模式中的每一个子载波组或被假设为最接近最佳组模式的准最优组模式计算通信信道信息。通信信道信息被指定为修改的通信信道信息。将表示最佳组模式或准最佳组模式的分组信息与修改的通信信道信息组合以产生反馈信息。在发送侧，基于从反馈信息再现的再现的反馈信息对子载波进行分组。

4. 发明授权

US07685501B2 Wireless communication system, receiving apparatus with a plurality of antennas, demodulating method for such wireless communication system, receiving apparatus, and program for such demodulating method 有权
标题翻译：无线通信系统，具有多个天线的接收装置，用于这种无线通信系统的解调方法，接收装置和用于这种解调方法的程序
公开(公告)号：US07685501B2
公开(公告)日：2010-03-23
申请号：US11476146
申请日：2006-06-28
申请人： Takumi Ito
发明人： Takumi Ito
IPC分类号： H03M13/00
CPC分类号： H04L1/0052 , H04B7/0848 , H04L25/03318
摘要： A receiving apparatus has two or more reception antennas, a data reproducer, and a likelihood information generator. The receiving apparatus operates selectively in a first reception mode and a second reception mode depending on the features of signals sent from a transmitting apparatus. In the first reception mode, the receiving apparatus reproduces data and generates likelihood information. In the second reception mode, the receiving apparatus reproduces data using the likelihood information generated in the first reception mode.
摘要翻译：接收装置具有两个以上的接收天线，数据再现器和似然信息发生器。接收装置根据从发送装置发送的信号的特征，以第一接收模式和第二接收模式选择性地进行操作。在第一接收模式中，接收装置再现数据并产生似然信息。在第二接收模式中，接收装置使用在第一接收模式中生成的似然信息再现数据。

5. 发明申请

US20070002515A1 Plasma processing apparatus and method for manufacturing thereof 审中-公开
标题翻译：等离子体处理装置及其制造方法
公开(公告)号：US20070002515A1
公开(公告)日：2007-01-04
申请号：US10555613
申请日：2004-05-13
申请人： Mamoru Hino , Satoshi Mayumi , Takumi Ito , Tsuyoshi Uehara , Takayuki Ono
发明人： Mamoru Hino , Satoshi Mayumi , Takumi Ito , Tsuyoshi Uehara , Takayuki Ono
IPC分类号： H01L21/683
CPC分类号： H01L21/67069 , H01J37/32357 , H05H1/2406 , H05H2001/2412
摘要： A plasma processing apparatus is provided on the side to be directed to a workpiece W of electrodes 31, 32 with a conductive member 51 through an insulating member 41. The insulating member 41 is sandwiched between the electrodes 31, 32 and the conductive member 51. The dielectric constant and the thickness of the insulating member 41 are established such that the voltage applied to a gap 40b formed between the insulating member 41 and the conductive member 51 becomes smaller than the sparking voltage. Owing to this arrangement, electrical discharge can be prevented from occurring in the gap 40b and thus, the processing quality can be enhanced.
摘要翻译：等离子体处理装置设置在通过绝缘构件41通过导电构件51指向电极31,32的工件W的一侧。绝缘构件41夹在电极31,32和导电构件51之间。建立绝缘构件41的介电常数和厚度，使得施加到形成在绝缘构件41和导电构件51之间的间隙40b的电压变得小于点火电压。由于这种布置，可以防止在间隙40b中发生放电，从而可以提高加工质量。

6. 发明申请

US20060165192A1 Wireless communication system, receiver, demodulation method used for the system and receiver, and program thereof 有权
标题翻译：无线通信系统，接收机，用于系统和接收机的解调方法及其程序
公开(公告)号：US20060165192A1
公开(公告)日：2006-07-27
申请号：US11336910
申请日：2006-01-23
申请人： Takumi Ito
发明人： Takumi Ito
IPC分类号： H04L1/02
CPC分类号： H04L25/03318 , H04B7/0854 , H04B7/0868 , H04L1/06 , H04L25/0204 , H04L25/0246 , H04L25/03216
摘要： In a wireless communication system having a receiver which receives, through plural reception antennae, signals transmitted from plural transmission antennae, bit likelihood can be surely calculated without requiring a selection processing. A transmitter has M transmission antennae, and transmits signals through the transmission antennae, respectively. A receiver has N reception antennae, and receives signals. K nulling devices perform nulling with use of signals received, and output part of nulling signals. K demodulation devices are inputted with nulling signals, demodulate signals, and output demodulated signals. A parallel-serial conversion device is inputted with demodulated signals, converts the parallel format thereof into a serial format, and outputs the result as demodulated data.
摘要翻译：在具有通过多个接收天线接收从多个发送天线发送的信号的接收机的无线通信系统中，可以可靠地计算位似然性，而不需要选择处理。发射机具有M个发射天线，分别通过发射天线发射信号。接收机具有N个接收天线，并接收信号。 K置零器件使用接收到的信号进行归零，并输出部分零位信号。 K个解调装置输入零信号，解调信号和输出解调信号。并行串行转换装置输入解调信号，将其并行格式转换为串行格式，并输出结果作为解调数据。

7. 发明授权

US07885364B2 Wireless communication system, receiver, demodulation method used for the system and receiver, and program thereof 有权
标题翻译：无线通信系统，接收机，用于系统和接收机的解调方法及其程序
公开(公告)号：US07885364B2
公开(公告)日：2011-02-08
申请号：US11336910
申请日：2006-01-23
申请人： Takumi Ito
发明人： Takumi Ito
IPC分类号： H04B7/10
CPC分类号： H04L25/03318 , H04B7/0854 , H04B7/0868 , H04L1/06 , H04L25/0204 , H04L25/0246 , H04L25/03216
摘要： In a wireless communication system having a receiver which receives, through plural reception antennae, signals transmitted from plural transmission antennae, bit likelihood can be surely calculated without requiring a selection processing. A transmitter has M transmission antennae, and transmits signals through the transmission antennae, respectively. A receiver has N reception antennae, and receives signals. K nulling devices perform nulling with use of signals received, and output part of nulling signals. K demodulation devices are inputted with nulling signals, demodulate signals, and output demodulated signals. A parallel-serial conversion device is inputted with demodulated signals, converts the parallel format thereof into a serial format, and outputs the result as demodulated data.
摘要翻译：在具有通过多个接收天线接收从多个发送天线发送的信号的接收机的无线通信系统中，可以可靠地计算位似然性，而不需要选择处理。发射机具有M个发射天线，分别通过发射天线发射信号。接收机具有N个接收天线，并接收信号。 K置零器件使用接收到的信号进行归零，并输出部分零位信号。 K个解调装置输入零信号，解调信号和输出解调信号。并行串行转换装置输入解调信号，将其并行格式转换为串行格式，并输出结果作为解调数据。

8. 发明授权

US07580447B2 Reception device and radio communication system using the same 失效
标题翻译：接收设备和使用它的无线电通信系统
公开(公告)号：US07580447B2
公开(公告)日：2009-08-25
申请号：US10547505
申请日：2004-05-20
申请人： Takumi Ito
发明人： Takumi Ito
IPC分类号： H04B1/00 , H04B1/10 , H04B17/02
CPC分类号： H04B7/06 , H04B1/7117 , H04B7/082
摘要： A reception device 81) has reception antennas (11-1 to 11-n) for receiving signals transmitted from a plurality of transmission antennas and outputting reception signals. A channel estimation device (12) estimates a channel between the antennas and outputs a channel estimation value H. A path selection device (13) inputs the channel estimation value H and calculates the channel correlation value between the transmission/reception antennas from the channel estimation value H. If the calculation result is smaller than a reference value, the path selection device (13) outputs a path selection signal selecting a path of a high power with a higher priority. On the other hand, if the calculation result is greater than the reference value, the path selection device (13) outputs a path selection signal selecting, with a higher priority, a path having a lower correlation value with a path detected by the other reception antenna. Despread devices (14-1 to 14-kn) input the reception signal and the path selection signal and output a despread signal. A demodulation device (15) inputs a despread signal and outputs a reproduction series.
摘要翻译：接收装置81）具有用于接收从多个发送天线发送的信号并输出接收信号的接收天线（11-1〜11-n）。信道估计装置（12）估计天线之间的信道并输出信道估计值H.路径选择装置（13）输入信道估计值H，并从信道估计中计算发送/接收天线之间的信道相关值如果计算结果小于参考值，路径选择装置（13）输出选择具有较高优先级的高功率路径的路径选择信号。另一方面，如果计算结果大于参考值，则路径选择装置（13）输出路径选择信号，其选择具有较低相关值的路径与由另一个接收检测到的路径天线。解扩器（14-1至14-kn）输入接收信号和路径选择信号，并输出解扩信号。解调装置（15）输入解扩信号并输出再现序列。

9. 发明授权

US07565114B2 Transmitter apparatus, receiver apparatus, and radio communication system 有权
标题翻译：发射机装置，接收装置和无线通信系统
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。

10. 发明申请

US20080152028A1 Ofdm Communication System 有权
标题翻译： Ofdm通信系统
公开(公告)号：US20080152028A1
公开(公告)日：2008-06-26
申请号：US11718510
申请日：2005-10-31
申请人： Hisashi Futaki , Yoshikazu Kakura , Shousei Yoshida , Takumi Ito
发明人： Hisashi Futaki , Yoshikazu Kakura , Shousei Yoshida , Takumi Ito
IPC分类号： H04L27/28
CPC分类号： H04L5/0094 , H04L5/0007 , H04L5/0046
摘要： N sub-carriers are grouped in units of predetermined quantities in order beginning with the one exhibiting the highest communication channel quality to generate an optimal group pattern on the reception side. Then, communication channel information is calculated for each of sub-carrier groups in the optimal group pattern or a quasi-optimal group pattern which is assumed to be closest to the optimal group pattern among a plurality of previously set group pattern candidates. Communication channel information is designated as modified communication channel information. Grouping information indicative of the optimal group pattern or quasi-optimal group pattern is combined with modified communication channel information to generate feedback information. On the transmission side, sub-carriers are grouped based on reproduced feedback information reproduced from the feedback information.
摘要翻译： N个子载波以预定量的单位被分组，从具有最高通信信道质量的一个开始，以在接收侧生成最佳组模式。然后，针对多个先前设定的组模式候选中的最佳组模式中的每一个子载波组或被假设为最接近最佳组模式的准最优组模式计算通信信道信息。通信信道信息被指定为修改的通信信道信息。将表示最佳组模式或准最佳组模式的分组信息与修改的通信信道信息组合以生成反馈信息。在发送侧，基于从反馈信息再现的再现的反馈信息对子载波进行分组。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式