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

US5561665A Automatic frequency offset compensation apparatus 失效
标题翻译：自动频偏补偿装置
公开(公告)号：US5561665A
公开(公告)日：1996-10-01
申请号：US509664
申请日：1995-07-31
申请人： Akihiko Matsuoka , Masayuki Orihashi , Kenichi Takahashi , Hiroshi Ohnishi
发明人： Akihiko Matsuoka , Masayuki Orihashi , Kenichi Takahashi , Hiroshi Ohnishi
IPC分类号： H04L27/22 , H04J3/00 , H04L27/00 , H04L27/233 , H04L27/34
CPC分类号： H04L27/2332 , H04L2027/003 , H04L2027/0046 , H04L2027/0053
摘要： An automatic frequency compensation apparatus comprises: a frequency offset prediction portion for predicting a frequency offset of an oscillation signal used for receiving a TDM digital modulation signal from the center frequency of the TDM digital modulation signal using a quadrature baseband signal derived from the TDM digital modulation signal, a vector correlation portion detecting a correlation between the quadrature baseband signal and a predetermined signal, the frequency offset prediction portion predicting when the correlation exceeds a reference value, and a frequency offset compensation portion effects a frequency offset compensation to the quadrature baseband. A convergent coefficient may be decreased with the number of events that the correlation exceeds the reference value. An equalizer may be further provided after the frequency offset compensation portion and the prediction is made using the output of the equalizer. The prediction is effected during the training period or during the training period when the correlation exceeds the reference value. The correlation may be detected using the output of the equalizer and a signal obtained by Judging or digitizing the output of the equalizer.
摘要翻译：一种自动频率补偿装置，包括：频率偏移预测部，用于使用从TDM数字调制得到的正交基带信号来预测用于从TDM数字调制信号的中心频率接收TDM数字调制信号的振荡信号的频率偏移信号，检测正交基带信号和预定信号之间的相关性的矢量相关部分，频率偏移预测部分，预测何时相关超过参考值，频率偏移补偿部分对正交基带进行频偏补偿。会聚系数随着相关值超过参考值的事件数量而减少。可以在频偏补偿部分之后进一步提供均衡器，并且使用均衡器的输出进行预测。在训练期间或在相关超过参考值的训练期间进行预测。可以使用均衡器的输出和通过判断或数字化均衡器的输出而获得的信号来检测相关性。

2. 发明授权

US06324221B1 Transmitter 失效
公开(公告)号：US06324221B1
公开(公告)日：2001-11-27
申请号：US09101443
申请日：1998-07-15
申请人： Akihiko Matsuoka , Masayuki Orihashi , Morikazu Sagawa , Kenichi Takahashi , Kouei Misaizu
发明人： Akihiko Matsuoka , Masayuki Orihashi , Morikazu Sagawa , Kenichi Takahashi , Kouei Misaizu
IPC分类号： H04K102
摘要： Nonlinear distortion compensating data is calculated by approximation equations at a compensating coefficient calculation section using an amplitude value of transmission quadrature base band signals obtained by a power calculating section, wherein by carrying out nonlinear distortion compensation at a nonlinear distortion compensating section using the data, it is possible to compensate nonlinear distortion generated in an amplifier of the transmission system without use of any memory table, and a nonlinear distortion compensating section can be obtained, which has a great effect of decrease distortion.

3. 发明授权

US5809009A Demodulator apparatus for digital radio communication receiver providing pseudo-coherent quadrature demodulation based on periodic estimation of frequency offset 失效
标题翻译：用于数字无线电通信接收机的解调器装置，其基于频率偏移的周期性估计提供伪相干正交解调
公开(公告)号：US5809009A
公开(公告)日：1998-09-15
申请号：US710194
申请日：1996-09-13
申请人： Akihiko Matsuoka , Masayuki Orihashi , Kenichi Takahashi
发明人： Akihiko Matsuoka , Masayuki Orihashi , Kenichi Takahashi
IPC分类号： H04L27/22 , H03J7/02 , H04J3/00 , H04L7/00 , H04L7/033 , H04L7/04 , H04L7/08 , H04L27/227 , H04J3/06
CPC分类号： H04L7/042 , H03J7/02 , H04L27/2273 , H04L7/0331 , H04L7/08
摘要： A demoodulator apparatus for a TDM radio receiver successively compares a sampled quadrature baseband signal with a known pilot symbol sequence to detect timings of correlation with a periodically received pilot symbol sequence, with a resultant correlation signal being used in generating a frame synchronizing signal as a basic timing reference signal, and with a degree of dispersion of the correlation signal being detected and used to modify generation of the frame synchronizing signal such as to minimize the effects of adverse radio signal reception conditions on that signal. In addition, demodulation of a quadrature phase-modulated carrier to obtain a quadrature baseband signal is executed by a pseudo-coherent process based on periodic estimation of a frequency offset, with a degree of compensation applied for the offset being accordingly periodically updated, making use of an automatic frequency control loop unnecessary.
摘要翻译：用于TDM无线电接收机的解码器装置连续地将采样的正交基带信号与已知的导频符号序列进行比较，以检测与周期性接收的导频符号序列的相关定时，所得到的相关信号用于生成帧同步信号作为基本定时参考信号，并且相关信号的色散程度被检测并用于修改帧同步信号的产生，以使不利的无线电信号接收条件对该信号的影响最小化。此外，通过基于频率偏移的周期性估计的伪相干处理来执行正交相位调制载波的解调以获得正交基带信号，相应地周期性地更新针对偏移量施加的补偿程度，从而使用的自动频率控制环路。

4. 发明授权

US06418173B1 Transmission Apparatus 失效
标题翻译：传输装置
公开(公告)号：US06418173B1
公开(公告)日：2002-07-09
申请号：US09101443
申请日：1998-07-15
申请人： Akihiko Matsuoka , Masayuki Orihashi , Morikazu Sagawa , Kenichi Takahashi , Kouei Misaizu
发明人： Akihiko Matsuoka , Masayuki Orihashi , Morikazu Sagawa , Kenichi Takahashi , Kouei Misaizu
IPC分类号： H04K102
CPC分类号： H03F1/3247 , H03C3/406 , H03F1/3258 , H03F1/3294 , H03F2200/57 , H03F2201/3233 , H04L27/368
摘要： Nonlinear distortion compensating data is calculated by approximation equations at a compensating coefficient calculation section using an amplitude value of transmission quadrature base band signals obtained by a power calculating section, wherein by carrying out nonlinear distortion compensation at a nonlinear distortion compensating section using the data, it is possible to compensate nonlinear distortion generated in an amplifier of the transmission system without use of any memory table, and a nonlinear distortion compensating section can be obtained, which has a great effect of decrease distortion.
摘要翻译：非线性失真补偿数据由补偿系数计算部使用由功率计算部获得的发送正交基带信号的振幅值来计算，其中，通过使用该数据在非线性失真补偿部进行非线性失真补偿，可以补偿在传输系统的放大器中产生的非线性失真而不使用任何存储表，并且可以获得非线性失真补偿部分，其具有减小失真的很大的效果。

5. 发明授权

US08625702B2 Transmitting apparatus, transmission method, receiving apparatus, and receiving method 有权
标题翻译：发送装置，发送方法，接收装置和接收方法
公开(公告)号：US08625702B2
公开(公告)日：2014-01-07
申请号：US13591840
申请日：2012-08-22
申请人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04B7/02 , H04B7/06 , H04B7/08 , H04L27/36 , H04L27/32 , H04L1/02 , H04L23/00
CPC分类号： H04L1/06 , H04B7/0413 , H04B7/0854 , H04L1/0054 , H04L1/006 , H04L1/007 , H04L25/03305 , H04L25/03324 , H04L25/03891 , H04L25/061 , H04L27/3488 , H04L27/38 , H04L2025/03611 , H04N19/39
摘要： A transmitting apparatus and method transmits different modulated signals from a plurality of antennas, and employs a configuration that includes a modulation section that obtains a modulated signal by performing signal point mapping of transmit bits using a signal point arrangement that is divided into a plurality of signal point sets on the IQ plane, whereby the minimum distance between signal points within a signal point set is smaller than the minimum signal point distance between signal point sets; and an antenna that transmits a modulated signal obtained by the modulation section. A signal point generating apparatus generates a first and second symbols to be transmitted by first and second antennas, respectively.
摘要翻译：一种发送装置和方法从多个天线发送不同的调制信号，并且采用包括通过使用信号点布置来执行发送比特的信号点映射来获得调制信号的调制部分的配置，该信号点布置被划分为多个信号在IQ平面上的点集合，由此信号点集合内的信号点之间的最小距离小于信号点集之间的最小信号点距离; 以及发送由调制部获得的调制信号的天线。信号点生成装置生成分别由第一和第二天线发送的第一和第二符号。

6. 发明授权

US08594242B2 Method of receiving modulation symbols 有权
标题翻译：接收调制符号的方法
公开(公告)号：US08594242B2
公开(公告)日：2013-11-26
申请号：US13409034
申请日：2012-02-29
申请人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L27/00
CPC分类号： H04L25/0204 , H04B7/0413 , H04B7/06 , H04B7/0626 , H04B7/0632 , H04B7/0671 , H04B7/0689 , H04B7/0697 , H04B7/082 , H04L1/0618 , H04L5/0023 , H04L5/003 , H04L5/0048 , H04L25/0206 , H04L27/04 , H04L27/06 , H04L27/12 , H04L27/14 , H04L27/18 , H04L27/2601 , H04L27/2602 , H04L27/2627 , H04L27/2649 , H04L27/2657 , H04L27/2659 , H04L27/2691 , H04L27/2695 , H04L69/22 , H04W52/52 , H04W72/0453
摘要： A method for receiving modulation signals includes receiving a plurality of multiplexed modulation signals each transmitted from multiple antennas of a communication partner, wherein each modulation signal includes a pilot symbol sequence consisting of plural pilot symbols used for demodulation. Each of the pilot symbol sequences is inserted at the same temporal points in the each modulation signal. The pilot symbol sequences are orthogonal to each other with zero cross correlation among the plurality of modulation signals, each pilot symbol having a non-zero amplitude, the quantity of the plural pilot symbols in each sequence being greater than the quantity of the plurality of transmitted modulation signals. The method further includes estimating a transmission path distortion of the each modulation signal based on the plurality of received multiplexed modulation signals; and demodulating the each modulation signal including the plurality of received multiplexed modulation signals using the transmission path distortion.
摘要翻译：一种用于接收调制信号的方法包括接收从通信对方的多个天线发送的多个多路调制信号，其中每个调制信号包括由用于解调的多个导频符号组成的导频符号序列。导频符号序列中的每一个在每个调制信号的相同的时间点被插入。导频符号序列在多个调制信号之间以零互相关方式彼此正交，每个导频符号具有非零幅度，每个序列中的多个导频符号的数量大于多个发送的数量调制信号。该方法还包括基于多个接收的复用调制信号来估计每个调制信号的传输路径失真; 以及使用传输路径失真来解调包括多个接收的复用调制信号的每个调制信号。

7. 发明授权

US08532219B2 Transmitting apparatus, transmitting method, receiving apparatus, and receiving method 有权
标题翻译：发送装置，发送方法，接收装置和接收方法
公开(公告)号：US08532219B2
公开(公告)日：2013-09-10
申请号：US13586442
申请日：2012-08-15
申请人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04B7/02
CPC分类号： H04L27/0008 , H04B7/0413 , H04B7/0417 , H04B7/0669 , H04L1/0006 , H04L1/0026 , H04L1/06 , H04L1/0618 , H04L1/08 , H04L5/0046 , H04L27/3405 , H04W52/42
摘要： Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S2(i) and S2(i+1) obtained from different data are transmitted at time i and time i+1 respectively. In contrast, as modulated signal A, modulated symbols S1(i) and S1(i)′ obtained by changing the signal point arrangement of the same data are transmitted at time i and time i+1 respectively. As a result the reception quality can be changed intentionally at time i and time i+1, and therefore using the demodulation result of modulated signal A of a time when the reception quality is good enables both modulated signals A and B to be demodulated with good error rate performances.
摘要翻译：从第一天线发送调制信号A，从第二天线发送调制信号B. 作为调制信号B，分别在时间i和时间i + 1发送从不同数据获得的调制符号S2（i）和S2（i + 1）。相反，作为调制信号A，分别在时间i和时间i + 1发送通过改变相同数据的信号点排列获得的调制符号S1（i）和S1（i）'。结果，可以在时间i和时间i + 1有意地改变接收质量，因此当接收质量好的时候使用调制信号A的解调结果使得调制信号A和B能够被良好地解调错误率表现。

8. 发明申请

US20120314809A1 TRANSMISSION METHOD, TRANSMISSION APPARATUS, RECEPTION METHOD, AND RECEPTION APPARATUS 有权
标题翻译：传输方法，传输装置，接收方法和接收装置
公开(公告)号：US20120314809A1
公开(公告)日：2012-12-13
申请号：US13590779
申请日：2012-08-21
申请人： Yutaka MURAKAMI , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka MURAKAMI , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L27/00
CPC分类号： H04B7/0413 , H04B7/0608 , H04B7/0613 , H04B7/0689 , H04B7/0697 , H04L1/06
摘要： Of any one of transmission method X of transmitting modulated signal A and modulated signal B including the same data from a plurality of antennas and transmission method Y of transmitting modulated signal A and modulated signal B having different data from the plurality of antennas, base station apparatus 201 does not change the transmission method during data transmission and changes only the modulation scheme. Base station apparatus 201 transmits modulated signal A and modulated signal B to communication terminal apparatus 251 using the determined transmission method and modulation scheme. In this way, it is possible to improve data transmission efficiency when transmitting data using the plurality of antennas.
摘要翻译：发送调制信号A的发送方法X和包含来自多个天线的相同数据的调制信号B和从多个天线发送调制信号A和调制信号B的数据不同的发送方式Y中的任一种，基站装置 201在数据传输期间不改变传输方法，并且仅改变调制方案。基站装置201使用确定的发送方法和调制方式向调制信号A和调制信号B发送到通信终端装置251。以这种方式，可以在使用多个天线发送数据时提高数据传输效率。

9. 发明授权

US08295391B2 Transmission method and transmission apparatus 有权
标题翻译：传输方法和传输设备
公开(公告)号：US08295391B2
公开(公告)日：2012-10-23
申请号：US13176459
申请日：2011-07-05
申请人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L27/00
CPC分类号： H04B7/0413 , H04B7/0608 , H04B7/0613 , H04B7/0689 , H04B7/0697 , H04L1/06
摘要： Of any one of transmission method X of transmitting modulated signal A and modulated signal B including the same data from a plurality of antennas and transmission method Y of transmitting modulated signal A and modulated signal B having different data from the plurality of antennas, base station apparatus 201 does not change the transmission method during data transmission and changes only the modulation scheme. Base station apparatus 201 transmits modulated signal A and modulated signal B to communication terminal apparatus 251 using the determined transmission method and modulation scheme. In this way, it is possible to improve data transmission efficiency when transmitting data using the plurality of antennas.
摘要翻译：发送调制信号A的发送方法X和包含来自多个天线的相同数据的调制信号B和从多个天线发送调制信号A和调制信号B的数据不同的发送方式Y中的任一种，基站装置 201在数据传输期间不改变传输方法，并且仅改变调制方案。基站装置201使用确定的发送方法和调制方式向调制信号A和调制信号B发送到通信终端装置251。以这种方式，可以在使用多个天线发送数据时提高数据传输效率。

10. 发明授权

US08121227B2 Reception device 有权
标题翻译：接收设备
公开(公告)号：US08121227B2
公开(公告)日：2012-02-21
申请号：US12882989
申请日：2010-09-15
申请人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka , Shutai Okamura
发明人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka , Shutai Okamura
IPC分类号： H04L27/06 , H04L1/02
CPC分类号： H04L27/38 , H04B7/04 , H04L25/03184 , H04L25/067 , H04L2025/0342 , H04L2025/03426
摘要： It is possible to demodulate a plurality of modulated signals transmitted from a plurality of antennas by using a comparatively small-size circuit with a preferable error ratio characteristic. Partial bit judgment units (509, 512) demodulates partial bits of the 64QAM-modulated signal by modifying which of the bits in the 6-bit strings constituting a symbol is to be demodulated depending on in which region of the IQ plane the reception signal point exists. This improves the partial bit error characteristic judged by the partial bit judgment units (509, 512), which in turn improves reliability of the reduced candidate signal point for use by a likelihood detection unit (518). As a result, it is possible to improve the error ratio characteristic of the final reception digital signals (322, 323).
摘要翻译：可以通过使用具有优选误差比特性的较小尺寸的电路来解调从多个天线发送的多个调制信号。部分位判断单元（509,512）通过根据IQ平面的哪个区域修改构成符号的6位串中的哪个位要解调64QAM调制信号的部分位，接收信号点存在这改善了由部分比特判断单元（509,512）判断的部分比特误差特性，这又提高了可靠性检测单元（518）使用的缩减候补信号点的可靠性。结果，可以提高最终接收数字信号（322,323）的误差比特性。

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