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：US20120140922A1

公开(公告)日：2012-06-07

申请号：US12962449

申请日：2010-12-07

申请人： Ramesh Annavajjala ,  Wei Liu ,  Chunjie Duan ,  Toshiaki Koike-Akino ,  Yige Wang

发明人： Ramesh Annavajjala ,  Wei Liu ,  Chunjie Duan ,  Toshiaki Koike-Akino ,  Yige Wang

IPC分类号： H04W12/04

CPC分类号： H04L9/0875 ,  H04L2209/80 ,  H04W12/02 ,  H04W12/04

摘要： The first and second nodes in a wireless network estimate first and second channel response. The first node quantizes the first channel response to produce a first bit sequence, and a feed-forward message, which is transmit as a feed-forward message to the second node. The second node quantizes the second channel response using the feed-forward message to produce and an estimate of the first bit sequence, a second bit sequence and a feed-back message, which is transmitted to the first node. Then, the first and second nodes delete bits in the respective bit sequences using the feed-back and feed-forward message to generate first and second private keys with low bit mismatch rate.

摘要翻译： 无线网络中的第一和第二节点估计第一和第二信道响应。 第一节点量化第一信道响应以产生第一比特序列，以及作为前馈消息作为第二节点发送的前馈消息。 第二节点使用前馈消息量化第二信道响应，以产生第一比特序列，第二比特序列和反馈消息的估计，其被发送到第一节点。 然后，第一和第二节点使用反馈和前馈消息删除各个比特序列中的比特，以产生具有低比特失配率的第一和第二私钥。

公开(公告)号：US08483387B2

公开(公告)日：2013-07-09

申请号：US12962449

申请日：2010-12-07

申请人： Ramesh Annavajjala ,  Wei Liu ,  Chunjie Duan ,  Toshiaki Koike-Akino ,  Yige Wang

发明人： Ramesh Annavajjala ,  Wei Liu ,  Chunjie Duan ,  Toshiaki Koike-Akino ,  Yige Wang

IPC分类号： H04L29/06

CPC分类号： H04L9/0875 ,  H04L2209/80 ,  H04W12/02 ,  H04W12/04

摘要： The first and second nodes in a wireless network estimate first and second channel response. The first node quantizes the first channel response to produce a first bit sequence, and a feed-forward message, which is transmit as a feed-forward message to the second node. The second node quantizes the second channel response using the feed-forward message to produce and an estimate of the first bit sequence, a second bit sequence and a feed-back message, which is transmitted to the first node. Then, the first and second nodes delete bits in the respective bit sequences using the feed-back and feed-forward message to generate first and second private keys with low bit mismatch rate.

摘要翻译： 无线网络中的第一和第二节点估计第一和第二信道响应。 第一节点量化第一信道响应以产生第一比特序列，以及作为前馈消息作为第二节点发送的前馈消息。 第二节点使用前馈消息量化第二信道响应，以产生第一比特序列，第二比特序列和反馈消息的估计，其被发送到第一节点。 然后，第一和第二节点使用反馈和前馈消息删除各个比特序列中的比特，以产生具有低比特失配率的第一和第二私钥。

公开(公告)号：US20110129234A1

公开(公告)日：2011-06-02

申请号：US13024769

申请日：2011-02-10

申请人： Chunjie Duan ,  Kieran Parsons ,  Philip V. Orlik

发明人： Chunjie Duan ,  Kieran Parsons ,  Philip V. Orlik

IPC分类号： H04B10/06

CPC分类号： G06F7/5057 ,  G06F7/5443 ,  H03M13/1111 ,  H03M13/658 ,  H04B10/6165 ,  H04L9/3218 ,  H04L2209/46 ,  H04L2209/50

摘要： A method and an optical receiver compensates for an error in a phase of an optical signal in a receiver. The signal includes blocks of symbols in a sequence. Each block is decoded based on a partially phase compensated symbols, and an average phase error for the block is estimated. Forward phase compensation and backward phase compensation is performed on the block based on the average phase error, and the decoding, estimating, performing is iterated until a termination condition is satisfied to produce a phase compensated block.

摘要翻译： 一种方法和光学接收机补偿接收机中光信号的相位中的误差。 信号包括序列中的符号块。 基于部分相位补偿的符号对每个块进行解码，并且估计块的平均相位误差。 基于平均相位误差对块进行正向相位补偿和反相补偿，迭代解码，估计执行直到满足终止条件以产生相位补偿块。

公开(公告)号：US08498544B2

公开(公告)日：2013-07-30

申请号：US13024769

申请日：2011-02-10

申请人： Chunjie Duan ,  Kieran Parsons ,  Philip V. Orlik

发明人： Chunjie Duan ,  Kieran Parsons ,  Philip V. Orlik

IPC分类号： H04B10/00

CPC分类号： G06F7/5057 ,  G06F7/5443 ,  H03M13/1111 ,  H03M13/658 ,  H04B10/6165 ,  H04L9/3218 ,  H04L2209/46 ,  H04L2209/50

摘要： A method and an optical receiver compensates for an error in a phase of an optical signal in a receiver. The signal includes blocks of symbols in a sequence. Each block is decoded based on a partially phase compensated symbols, and an average phase error for the block is estimated. Forward phase compensation and backward phase compensation is performed on the block based on the average phase error, and the decoding, estimating, performing is iterated until a termination condition is satisfied to produce a phase compensated block.

摘要翻译： 一种方法和光学接收机补偿接收机中光信号的相位中的误差。 信号包括序列中的符号块。 基于部分相位补偿的符号对每个块进行解码，并且估计块的平均相位误差。 基于平均相位误差对块进行正向相位补偿和反相补偿，迭代解码，估计执行直到满足终止条件以产生相位补偿块。

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：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：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：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。

公开(公告)号：US20110075707A1

公开(公告)日：2011-03-31

申请号：US12571191

申请日：2009-09-30

申请人： Chunjie Duan ,  Weihua Gao

发明人： Chunjie Duan ,  Weihua Gao

IPC分类号： H04B1/707

CPC分类号： H04L25/03343 ,  H04L5/0044 ,  H04L25/03821 ,  H04L27/2601

摘要： Embodiments of the invention disclose a system and a method for reducing inter-carrier interference (ICI) in a network, wherein the network uses orthogonal frequency division multiplexing (OFDM). The method generates, in a transmitter, a diversified signal, wherein a diversified signal includes diversified elements representing data elements, such that each data element is represented by a number of diversified elements, wherein the number equals a degree of diversity. The diversified signal is modified based on an orthogonal matrix producing a spread signal, wherein columns of the orthogonal matrix are formed by vectors, wherein the vectors are orthogonal or quasi-orthogonal to each others, and the spread signal is transmitted in the network.

摘要翻译： 本发明的实施例公开了一种用于减少网络中的载波间干扰（ICI）的系统和方法，其中网络使用正交频分复用（OFDM）。 该方法在发射机中产生多样化信号，其中多样化信号包括表示数据元素的多样化元素，使得每个数据元素由多个多样化元素表示，其中该数目等于分集度。 基于产生扩展信号的正交矩阵修改多样化信号，其中正交矩阵的列由向量形成，其中矢量彼此正交或准正交，并且扩展信号在网络中传输。