公开(公告)号：US08451956B2

公开(公告)日：2013-05-28

申请号：US12650410

申请日：2009-12-30

申请人： Man-On Pun ,  Chunjie Duan ,  Zafer Sahinoglu ,  Dirk Brinkman

发明人： Man-On Pun ,  Chunjie Duan ,  Zafer Sahinoglu ,  Dirk Brinkman

IPC分类号： H04B1/10

CPC分类号： H04L25/067 ,  H04L1/0045 ,  H04L27/2647

摘要： A blanking scheme for mitigating impulsive noise in wireless networks is based on the signal-to-noise ratio (SNR) of symbols. To fully gain the benefits of the SNR-based blanking scheme, two methods are developed, namely a multi-level thresholding scheme in the time-, spatial- and frequency-domains, and a weighted-input error-correction decoding. The symbols are conditioned as a function of the estimated SNR in time-, frequency-, or spatial-domains or combinations therefore, and the conditioning is applied to an amplitude, phase, or energy level, or combinations thereof.

摘要翻译： 用于减轻无线网络中的脉冲噪声的消隐方案是基于符号的信噪比（SNR）。 为了充分获得基于SNR的消隐方案的优点，开发了两种方法，即时域，空间和频域中的多级阈值方案和加权输入纠错解码。 符号在时间，频率或空间域或组合中作为估计的SNR的函数进行调节，并且将调节应用于幅度，相位或能级或其组合。

公开(公告)号：US20110158360A1

公开(公告)日：2011-06-30

申请号：US12650410

申请日：2009-12-30

申请人： Man-On Pun ,  Chunjie Duan ,  Zafer Sahinoglu ,  Dirk Brinkman

发明人： Man-On Pun ,  Chunjie Duan ,  Zafer Sahinoglu ,  Dirk Brinkman

IPC分类号： H04B1/10

CPC分类号： H04L25/067 ,  H04L1/0045 ,  H04L27/2647

摘要： A blanking scheme for mitigating impulsive noise in wireless networks is based on the signal-to-noise ratio (SNR) of symbols. To fully gain the benefits of the SNR-based blanking scheme, two methods are developed, namely a multi-level thresholding scheme in the time-, spatial- and frequency-domains, and a weighted-input error-correction decoding. The symbols are conditioned as a function of the estimated SNR in time-, frequency-, or spatial-domains or combinations therefore, and the conditioning is applied to an amplitude, phase, or energy level, or combinations thereof.

摘要翻译： 用于减轻无线网络中的脉冲噪声的消隐方案是基于符号的信噪比（SNR）。 为了充分获得基于SNR的消隐方案的优点，开发了两种方法，即时域，空间和频域中的多级阈值方案和加权输入纠错解码。 符号在时间，频率或空间域或组合中作为估计的SNR的函数进行调节，并且将调节应用于幅度，相位或能级或其组合。

公开(公告)号：US08472304B2

公开(公告)日：2013-06-25

申请号：US12503169

申请日：2009-07-15

申请人： Philip V. Orlik ,  Qinghe Du ,  Zafer Sahinoglu ,  Chunjie Duan ,  Jinyun Zhang

发明人： Philip V. Orlik ,  Qinghe Du ,  Zafer Sahinoglu ,  Chunjie Duan ,  Jinyun Zhang

IPC分类号： H04J11/00

CPC分类号： H04L5/0007 ,  H04L5/003 ,  H04L5/0048

摘要： A method allocates bandwidth to channels in an orthogonal frequency division multiple access and time division multiple access (TDMA) network. The network includes a master device (master) communicating with a set of slave devices (slaves). The master defines a set Ψm of logical indices ν of a set of N physical subcarriers for a set of M data streams to be allocated to a set of Nd logical data subcarriers according to Ψm={ν|ν=iM+m, i=0,1,2, . . . , d−1}, where d=Nd/M. The set of N data subcarriers is mapped to the set of Nd logical subcarriers according to the logical indices, and the data subcarriers are allocated to the logical subcarriers.

摘要翻译： 一种方法为正交频分多址和时分多址（TDMA）网络中的信道分配带宽。 网络包括与一组从设备（从站）通信的主设备（主设备）。 主器件根据Psim = {nu | nu = iM + m，i = 1，...，n）定义要分配给一组Nd逻辑数据子载波的一组M个数据流的N个物理子载波的逻辑索引nu的集合Psim， 0,1,2，。 。 。 ，d-1}，其中d = Nd / M。 N组数据子载波根据逻辑索引映射到一组Nd逻辑子载波，并将数据副载波分配给逻辑子载波。

公开(公告)号：US20100260276A1

公开(公告)日：2010-10-14

申请号：US12420629

申请日：2009-04-08

申请人： Philip V. Orlik ,  Qinghe Du ,  Chunjie Duan ,  Zafer Sahinoglu

发明人： Philip V. Orlik ,  Qinghe Du ,  Chunjie Duan ,  Zafer Sahinoglu

IPC分类号： H04L27/28

CPC分类号： H04L27/2631 ,  H04J13/0055 ,  H04J13/14 ,  H04L27/2613 ,  H04L27/2644 ,  H04L27/2652 ,  H04L27/2663 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2692

摘要： In an oversampled orthogonal frequency-division multiplexing (OFDM) orthogonal network, the preamble used for time synchronization does not have an ideal autocorrelation function due to guard bands, which degrade the accuracy of symbol timing. Therefore, a zero-correlation-zone (ZCZ) based preamble is used for time synchronization. Across correlation function (CCF) used for time synchronization is forced to 0 within a certain region around a main lobe. The length of the ZCZ is guaranteed to be larger than a cyclic prefix length of OFDM data symbols synchronization accuracy.

摘要翻译： 在过采样正交频分复用（OFDM）正交网络中，用于时间同步的前导码由于保护频带而不具有理想的自相关函数，这降低了符号定时的精度。 因此，基于零相关区（ZCZ）的前导码用于时间同步。 用于时间同步的相关函数（CCF）在主瓣周围的某个区域内强制为0。 确保ZCZ的长度大于OFDM数据符号同步精度的循环前缀长度。

公开(公告)号：US08089856B2

公开(公告)日：2012-01-03

申请号：US12420629

申请日：2009-04-08

申请人： Philip V. Orlik ,  Qinghe Du ,  Chunjie Duan ,  Zafer Sahinoglu

发明人： Philip V. Orlik ,  Qinghe Du ,  Chunjie Duan ,  Zafer Sahinoglu

IPC分类号： H04J11/00

CPC分类号： H04L27/2631 ,  H04J13/0055 ,  H04J13/14 ,  H04L27/2613 ,  H04L27/2644 ,  H04L27/2652 ,  H04L27/2663 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2692

摘要： In an oversampled orthogonal frequency-division multiplexing (OFDM) orthogonal network, the preamble used for time synchronization does not have an ideal autocorrelation function due to guard bands, which degrade the accuracy of symbol timing. Therefore, a zero-correlation-zone (ZCZ) based preamble is used for time synchronization. Across correlation function (CCF) used for time synchronization is forced to 0 within a certain region around a main lobe. The length of the ZCZ is guaranteed to be larger than a cyclic prefix length of OFDM data symbols synchronization accuracy.

摘要翻译： 在过采样正交频分复用（OFDM）正交网络中，用于时间同步的前导码由于保护频带而不具有理想的自相关函数，这降低了符号定时的精度。 因此，基于零相关区（ZCZ）的前导码用于时间同步。 用于时间同步的相关函数（CCF）在主瓣周围的某个区域内强制为0。 确保ZCZ的长度大于OFDM数据符号同步精度的循环前缀长度。

公开(公告)号：US20110133567A1

公开(公告)日：2011-06-09

申请号：US12630710

申请日：2009-12-03

申请人： Koon Hoo Teo ,  Da Huang ,  Chunjie Duan ,  Zafer Sahinoglu

发明人： Koon Hoo Teo ,  Da Huang ,  Chunjie Duan ,  Zafer Sahinoglu

IPC分类号： H01F38/00

CPC分类号： H02J50/12 ,  B66B7/00 ,  H02J17/00

摘要： Embodiments of the invention disclose a system configured to exchange energy wirelessly. The system includes a structure configured to exchange the energy wirelessly via a coupling of evanescent waves, wherein the structure is electromagnetic (EM) and non-radiative, and wherein the structure generates an EM near-field in response to receiving the energy; and a negative index material (NIM) arranged within the EM near-field such that the coupling is enhanced.

摘要翻译： 本发明的实施例公开了一种被配置为无线交换能量的系统。 该系统包括被配置为经由ev逝波的耦合无线地交换能量的结构，其中该结构是电磁（EM）和非辐射的，并且其中该结构响应于接收能量而产生EM近场; 以及布置在EM近场内的负指数材料（NIM），使得耦合被增强。

公开(公告)号：US20100246375A1

公开(公告)日：2010-09-30

申请号：US12503169

申请日：2009-07-15

申请人： Philip V. Orlik ,  Qinghe Du ,  Zafer Sahinoglu ,  Chunjie Duan ,  Jinyun Zhang

发明人： Philip V. Orlik ,  Qinghe Du ,  Zafer Sahinoglu ,  Chunjie Duan ,  Jinyun Zhang

IPC分类号： H04J11/00 ,  H04J4/00

CPC分类号： H04L5/0007 ,  H04L5/003 ,  H04L5/0048

摘要： A method allocates bandwidth to channels in an orthogonal frequency division multiple access and time division multiple access (TDMA) network. The network includes a master device (master) communicating with a set of slave devices (slaves). The master defines a set Ψm of logical indices ν of a set of N physical subcarriers for a set of M data streams to be allocated to a set of Nd logical data subcarriers according to Ψm={ν|ν=iM+m, i=0,1,2, . . . , d−1}, where d=Nd/M. The set of N data subcarriers is mapped to the set of Nd logical subcarriers according to the logical indices, and the data subcarriers are allocated to the logical subcarriers.

摘要翻译： 一种方法为正交频分多址和时分多址（TDMA）网络中的信道分配带宽。 网络包括与一组从设备（从站）通信的主设备（主设备）。 主人定义逻辑索引的集Ψm＆ngr; 的一组N个物理子载波，用于根据Ψm= {＆ngr; |＆ngr; = iM + m，i = 0,1,2，被分配给一组Nd逻辑数据子载波的一组M个数据流。 。 。 ，d-1}，其中d = Nd / M。 N组数据子载波根据逻辑索引映射到一组Nd逻辑子载波，并将数据副载波分配给逻辑子载波。

公开(公告)号：US08565214B2

公开(公告)日：2013-10-22

申请号：US12979777

申请日：2010-12-28

申请人： Jianlin Guo ,  Raymond Yim ,  Jinyun Zhang ,  Philip V. Orlik ,  Chunjie Duan ,  Frederick J Igo, Jr.

发明人： Jianlin Guo ,  Raymond Yim ,  Jinyun Zhang ,  Philip V. Orlik ,  Chunjie Duan ,  Frederick J Igo, Jr.

IPC分类号： H04W4/00

CPC分类号： H04W72/1242

摘要： A hybrid communication network for a transportation safety system includes a fixed wired nodes and mobile wireless nodes. Because the wired nodes operate independently packets transmitted by the wired nodes to the wireless nodes need to be synchronized. A downlink travel time for downlink packets traveling from a controller to the wireless nodes is determined. Then, the controller schedules downlink data intervals (DDI) based on the downlink travel time; and transmits downlink packets to the wireless nodes during the DDI, such that a latency requirement of the transportation safety system is satisfied.

摘要翻译： 用于运输安全系统的混合通信网络包括固定有线节点和移动无线节点。 由于有线节点独立运行，有线节点传输到无线节点的数据包需要同步。 确定从控制器到无线节点的下行链路分组的下行链路行进时间。 然后，控制器基于下行链路行进时间调度下行链路数据间隔（DDI）; 并且在DDI期间向无线节点发送下行链路分组，使得满足运输安全系统的等待时间要求。

公开(公告)号：US20130170842A1

公开(公告)日：2013-07-04

申请号：US13343133

申请日：2012-01-04

申请人： Toshiaki Koike-Akino ,  Chunjie Duan ,  Kieran Parsons ,  Keisuke Kojima

发明人： Toshiaki Koike-Akino ,  Chunjie Duan ,  Kieran Parsons ,  Keisuke Kojima

IPC分类号： H04B10/06

CPC分类号： H04L25/03184 ,  H04L25/03171 ,  H04L25/03286

摘要： A method equalizes and decodes a received signal including a sequence of symbols. Subsequences of the signal are selected, wherein the subsequences are overlapping and time shifted. For each subsequence, statistics of the channel corresponding to a pattern in the subsequence are selected, wherein the statistics include high-order statistics. A transmitted signal corresponding to the received signal is then estimated based on the statistics.

摘要翻译： 一种方法对包括符号序列的接收信号进行均衡和解码。 选择信号的子序列，其中子序列重叠并且时移。 对于每个子序列，选择与子序列中的模式对应的信道的统计，其中统计信息包括高阶统计。 然后，基于统计量来估计与接收信号对应的发送信号。

公开(公告)号：US08345808B2

公开(公告)日：2013-01-01

申请号：US12385078

申请日：2009-03-30

申请人： Zhenzhen Ye ,  Chunjie Duan ,  Philip Orlik ,  Jinyun Zhang

发明人： Zhenzhen Ye ,  Chunjie Duan ,  Philip Orlik ,  Jinyun Zhang

IPC分类号： H03D1/06

CPC分类号： H04J11/0066 ,  H04B1/719

摘要： An exemplary method is disclosed to accurately estimate the center frequency of a narrow-band interference (NBI). The exemplary method uses multi-stage autocorrelation-function (ACF) to estimate an NBI frequency. The exemplary method allows an accurate estimation of the center frequency of NBI in an Ultra-Wideband system. A narrow band interference (NBI) estimator based on such a method allows a low complexity hardware implementation. The exemplary method estimates the frequency in multiple stages. Each stage performs an ACF operation on the received signals. The first stage gives an initial estimation and the following stages refine the estimation. The results of all stages are combined to produce the final estimation. An apparatus based on such a multi-stage narrow band interference frequency detector is also disclosed to improve the accuracy by combining various filters with the detector.

摘要翻译： 公开了一种用于精确估计窄带干扰（NBI）的中心频率的示例性方法。 该示例性方法使用多级自相关函数（ACF）来估计NBI频率。 该示例性方法允许在超宽带系统中准确估计NBI的中心频率。 基于这种方法的窄带干扰（NBI）估计器允许低复杂度的硬件实现。 该示例性方法以多个阶段估计频率。 每个级对所接收的信号执行ACF操作。 第一阶段给出初步估计，并且以下阶段改进估计。 结合所有阶段的结果进行最终估计。 还公开了一种基于这种多级窄带干扰频率检测器的装置，通过将各种滤波器与检测器组合来提高精度。