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11. 发明申请

US20130272644A1 Multi-Mode Interference Manipulator 有权
标题翻译：多模式干扰机器人
公开(公告)号：US20130272644A1
公开(公告)日：2013-10-17
申请号：US13445885
申请日：2012-04-12
申请人： Keisuke Kojima , Bingnan Wang , Toshiaki Koike-Akino , Wangqing Yuan , Satoshi Nishikawa
发明人： Keisuke Kojima , Bingnan Wang , Toshiaki Koike-Akino , Wangqing Yuan , Satoshi Nishikawa
IPC分类号： G02F1/01 , B82Y20/00
CPC分类号： B82Y20/00 , G02B6/1226 , G02B6/274 , G02B6/2813
摘要： A multi-mode interference includes a core portion suitable, at any point, for propagating an optical signal having multiple spatial modes. The core portion includes a shifting section for shifting phases of the spatial modes of the optical signal.
摘要翻译：多模式干扰包括在任何点上适于传播具有多个空间模式的光信号的核心部分。芯部包括用于移动光信号的空间模式的相位的移位部分。

12. 发明授权

US09215457B2 Method and system for communicating multimedia using reconfigurable rateless codes and decoding in-process status feedback 有权
标题翻译：使用可重新配置的无码代码进行多媒体通信和解码进程状态反馈的方法和系统
公开(公告)号：US09215457B2
公开(公告)日：2015-12-15
申请号：US13475350
申请日：2012-05-18
申请人： Toshiaki Koike-Akino , Jesper H Soerensen , Philip Orlik
发明人： Toshiaki Koike-Akino , Jesper H Soerensen , Philip Orlik
IPC分类号： H04N7/26 , H04N19/164 , H03M13/37
CPC分类号： H04N19/164 , H03M13/373 , H03M13/3761
摘要： A method and system use capacity-approaching rateless code to communicate multimedia data even with very short codewords, such as 64 bits or less, via erasure and noise channels. The method provides a way to design the edge degree distribution of rateless codes for any arbitrary channel. Based on an equivalent metric of decoding behavior in any channels, the degree distribution of a rateless code such as Luby-transform codes and raptor codes is optimized based on in-process status of decoding. A regularized least-squares optimization is used to avoid erroneous decoding. Multiple feedbacks can further improve the performance.
摘要翻译：一种方法和系统使用容量接近的无码代码即使通过擦除和噪声信道的诸如64位或更少的非常短的码字来传送多媒体数据。该方法提供了一种设计任意任意通道的无码代码边缘度分布的方法。基于任何通道中的解码行为的等效度量，基于解码的进程内状态来优化诸如Luby变换代码和猛禽代码之类的无码代码的度分布。使用正则化的最小二乘优化来避免错误的解码。多个反馈可以进一步提高性能。

13. 发明授权

US08472550B2 Method for reducing interference in multi-cell multi-user wireless networks 有权
标题翻译：减少多小区多用户无线网络干扰的方法
公开(公告)号：US08472550B2
公开(公告)日：2013-06-25
申请号：US12978072
申请日：2010-12-23
申请人： Toshiaki Koike-Akino , Tiangao Gou , Man-On Pun
发明人： Toshiaki Koike-Akino , Tiangao Gou , Man-On Pun
IPC分类号： H04B15/00
CPC分类号： H04L25/03974 , H04B7/024 , H04B7/0413 , H04J11/005 , H04L25/03891 , H04W28/04 , H04W28/06 , H04W48/16 , H04W72/12
摘要： This invention provides a method for exploiting precoder optimization gains and multi-user diversity gains with interference alignment in general MIMO wireless networks including multiple users. Specifically, two embodiments exploit either a gradient-based search or iteratively orthogonalizing inference. The method can achieve near-optimal performance at a low complexity. Furthermore, a scheduling criterion is provided for wireless networks comprised of a large number of mobile stations in each cell. The criterion can be done independently in each cell to significantly reduce information exchanged between base stations in different cells compared to the methods that perform joint scheduling over all cells. The two embodiments can be utilized in a spectrally efficient communications network equipped with relaying nodes.
摘要翻译：本发明提供一种利用包括多个用户的通用MIMO无线网络中的干扰对准来利用预编码器优化增益和多用户分集增益的方法。具体地，两个实施例利用基于梯度的搜索或迭代正交化推理。该方法可以在低复杂度下实现接近最佳性能。此外，为每个小区中包括大量移动台的无线网络提供调度准则。与在所有小区执行联合调度的方法相比，可以在每个小区中独立地完成该标准以显着减少不同小区中的基站之间交换的信息。这两个实施例可以用于配备有中继节点的频谱有效的通信网络中。

14. 发明申请

US20120263464A1 Adaptive Cross-Polarization Modulation Cancellers for Coherent Optical Communication Systems 有权
标题翻译：相干光通信系统的自适应交叉极化调制消除器
公开(公告)号：US20120263464A1
公开(公告)日：2012-10-18
申请号：US13085715
申请日：2011-04-13
申请人： Toshiaki Koike-Akino , Cheng Liu , Kieran Parsons
发明人： Toshiaki Koike-Akino , Cheng Liu , Kieran Parsons
IPC分类号： H04B10/06 , H04J14/06
CPC分类号： H04L25/03292 , H04B10/6162 , H04B10/6163 , H04L25/024
摘要： For coherent fiber optic communications, the nonlinear XPolM impairment is the most important issue to realize over-100 Gbps high-speed transmissions. A method provides a way to cancel time-varying XPolM crosstalk by introducing multi-stage adaptive mechanism. In the method, a low-complexity adaptive filtering based on recursive least-squares (RLS) first tracks the time-varying crosstalk along with the per-survivor trellis-state decoding. The estimated channel and the decoded data are then used to calculate the empirical covariance, which is in turn exploited to obtain more accurate channel estimates by means of optimal-weighted least-squares. This is performed with a low-complexity processing over frequency domain with fast Fourier transform. The performance is significantly improved with turbo principle decoding, more specifically, iterative decoding and iterative estimation over a block.
摘要翻译：对于相干光纤通信，非线性XPolM损伤是实现超过100 Gbps高速传输的最重要问题。一种方法提供了一种通过引入多级自适应机制来消除时变XPolM串扰的方法。在该方法中，基于递归最小二乘法（RLS）的低复杂度自适应滤波首先跟踪随时间变化的串扰以及每个幸存者网格状态解码。然后将估计的信道和解码的数据用于计算经验协方差，其经过利用最佳加权最小二乘法获得更准确的信道估计。这是通过具有快速傅立叶变换的频域上的低复杂度处理来执行的。通过turbo原理解码，更具体地说，在块上迭代解码和迭代估计，性能得到显着提高。

15. 发明申请

US20120201320A1 Sparse Channel Estimation Using Order Extension for Frequency and Time Selective MIMO Wireless Communication Networks 有权
标题翻译：使用频率和时间选择MIMO无线通信网络的订单扩展的稀疏信道估计
公开(公告)号：US20120201320A1
公开(公告)日：2012-08-09
申请号：US13023231
申请日：2011-02-08
申请人： Toshiaki Koike-Akino
发明人： Toshiaki Koike-Akino
IPC分类号： H04B7/02
CPC分类号： H04L25/0204 , H04L25/0246
摘要： A channel matrix is estimated for a channel subject to frequency and time selective fading in a multiple-input multiple-output (MIMO) wireless communication network. The method uses a recursive least-squares (RLS) process and an expectation-maximization (EM) process, based on a L1-Lq regularized sparse regression. The method significantly improves an accuracy of the channel estimation by using high-order matrix extension to obtain covariance matrices. The covariance matrices and an initial estimate are refined by a sparse EM to obtain the final estimate of the channel.
摘要翻译：对于在多输入多输出（MIMO）无线通信网络中经受频率和时间选择性衰落的信道估计信道矩阵。该方法使用基于L1-Lq正则化稀疏回归的递归最小二乘法（RLS）过程和期望最大化（EM）过程。该方法通过使用高阶矩阵扩展来获得协方差矩阵，显着提高了信道估计的准确性。协方差矩阵和初始估计由稀疏EM进行细化以获得信道的最终估计。

16. 发明申请

US20120163433A1 Method for Reducing Interference in Multi-Cell Multi-User Wireless Networks 有权
标题翻译：减少多小区多用户无线网络干扰的方法
公开(公告)号：US20120163433A1
公开(公告)日：2012-06-28
申请号：US12978072
申请日：2010-12-23
申请人： Toshiaki Koike-Akino , Tiangao Gou , Man-On Pun
发明人： Toshiaki Koike-Akino , Tiangao Gou , Man-On Pun
IPC分类号： H04W24/02
CPC分类号： H04L25/03974 , H04B7/024 , H04B7/0413 , H04J11/005 , H04L25/03891 , H04W28/04 , H04W28/06 , H04W48/16 , H04W72/12
摘要： This invention provides a method for exploiting precoder optimization gains and multi-user diversity gains with interference alignment in general MIMO wireless networks including multiple users. Specifically, two embodiments exploit either a gradient-based search or iteratively orthogonalizing inference. The method can achieve near-optimal performance at a low complexity. Furthermore, a scheduling criterion is provided for wireless networks comprised of a large number of mobile stations in each cell. The criterion can be done independently in each cell to significantly reduce information exchanged between base stations in different cells compared to the methods that perform joint scheduling over all cells. The two embodiments can be utilized in a spectrally efficient communications network equipped with relaying nodes.
摘要翻译：本发明提供一种利用包括多个用户的通用MIMO无线网络中的干扰对准来利用预编码器优化增益和多用户分集增益的方法。具体地，两个实施例利用基于梯度的搜索或迭代正交化推理。该方法可以在低复杂度下实现接近最佳性能。此外，为每个小区中包括大量移动台的无线网络提供调度准则。与在所有小区执行联合调度的方法相比，可以在每个小区中独立地完成该标准以显着减少不同小区中的基站之间交换的信息。这两个实施例可以用于配备有中继节点的频谱有效的通信网络中。

17. 发明授权

US08451930B2 Sparse channel estimation using order extension for frequency and time selective MIMO wireless communication networks 有权
标题翻译：使用频率和时间选择性MIMO无线通信网络的顺序扩展的稀疏信道估计
公开(公告)号：US08451930B2
公开(公告)日：2013-05-28
申请号：US13023231
申请日：2011-02-08
申请人： Toshiaki Koike-Akino
发明人： Toshiaki Koike-Akino
IPC分类号： H04L1/02 , H04B7/02
CPC分类号： H04L25/0204 , H04L25/0246
摘要： A channel matrix is estimated for a channel subject to frequency and time selective fading in a multiple-input multiple-output (MIMO) wireless communication network. The method uses a recursive least-squares (RLS) process and an expectation-maximization (EM) process, based on a L1-Lq regularized sparse regression. The method significantly improves an accuracy of the channel estimation by using high-order matrix extension to obtain covariance matrices. The covariance matrices and an initial estimate are refined by a sparse EM to obtain the final estimate of the channel.
摘要翻译：对于在多输入多输出（MIMO）无线通信网络中经受频率和时间选择性衰落的信道估计信道矩阵。该方法使用基于L1-Lq正则化稀疏回归的递归最小二乘法（RLS）过程和期望最大化（EM）过程。该方法通过使用高阶矩阵扩展来获得协方差矩阵，显着提高了信道估计的准确性。协方差矩阵和初始估计由稀疏EM进行细化以获得信道的最终估计。

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