公开(公告)号：US20110194452A1

公开(公告)日：2011-08-11

申请号：US13092562

申请日：2011-04-22

申请人： Philip Orlik ,  Raymond Yim ,  Chunjie Duan ,  Jinyun Zhang

发明人： Philip Orlik ,  Raymond Yim ,  Chunjie Duan ,  Jinyun Zhang

IPC分类号： H04L12/26 ,  H04L12/56

CPC分类号： H04N19/615 ,  H04N19/105 ,  H04N19/13 ,  H04N19/46 ,  H04N19/597 ,  H04N19/61 ,  H04N19/63

摘要： A transmitter transmits data having a set of two or more priorities on subcarriers using orthogonal frequency division multiplexing (OFDM) symbols. The transmitter includes a media access (MAC) layer, wherein the MAC layer further includes a queue for storing data at each priority, a rate control block connected to each queue, and a physical (PHY) layer. The PHY layer further includes a channel coder for each priority, wherein each channel coder is connected to the corresponding queue to receive data, and to the rate control block to send coding information.

摘要翻译： 发射机使用正交频分复用（OFDM）符号在子载波上发射具有两个或更多个优先级集合的数据。 所述发射机包括媒体接入（MAC）层，其中所述MAC层还包括用于存储每个优先级的数据的队列，连接到每个队列的速率控制块以及物理（PHY）层。 PHY层还包括用于每个优先级的信道编码器，其中每个信道编码器连接到对应的队列以接收数据，并且连接到速率控制块以发送编码信息。

公开(公告)号：US20100246635A1

公开(公告)日：2010-09-30

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： H04B1/69 ,  H04B1/10

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：US20090296684A1

公开(公告)日：2009-12-03

申请号：US12453685

申请日：2009-05-19

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： H04J3/06 ,  H04K1/10

CPC分类号： H04J3/0608

摘要： Synchronization methods and systems for communications over a multi-band system are presented. A synchronization technique for communications over a multi-band system includes receiving a packet of preamble symbols respectively transmitted over a sequence of frequency sub-bands according to one of a plurality of frequency hopping patterns, wherein the plurality of frequency hopping patterns are partitioned into a plurality of disjoint groups, each group having a different associated periodicity; computing, in parallel, respective autocorrelation values of the packet received in a selected frequency sub-band at a plurality of symbol delays; and selecting one of the plurality of groups of frequency hopping patterns based on the autocorrelation values at the plurality of symbol delays.

摘要翻译： 介绍了多频段系统通信的同步方法和系统。 用于通过多频带系统进行通信的同步技术包括：接收根据多个跳频模式之一分别在一系列频率子带上传送的前导符号分组，其中多个跳频模式被划分为 多个不相交组，每组具有不同的相关周期; 并行地计算在多个符号延迟时在所选择的频率子带中接收的分组的相应自相关值; 以及基于所述多个符号延迟的所述自相关值来选择所述多个组跳频模式中的一个。

公开(公告)号：US07016405B2

公开(公告)日：2006-03-21

申请号：US10075330

申请日：2002-02-14

申请人： Jyhchau Horng ,  Jinyun Zhang ,  Philip Orlik

发明人： Jyhchau Horng ,  Jinyun Zhang ,  Philip Orlik

IPC分类号： H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC分类号： H04L25/03133

摘要： A method and system for equalizing a signal transmitted via a channel of a communications system stores an input signal received via the channel in a main buffer. A training signal portion of the received input signal is stored in a circular buffer as a circulating training signal. A mean square error of the training signal is minimized while estimating the transmitted signal, until the mean square error is less than a predetermine threshold. In this case, the input signal received via the channel is equalized directly to make decisions on symbols of the signal transmitted via the channel. During an initial stage of training, the mean square error is determined directly from the training signal, during subsequent stages of training the circulating training signal is used.

公开(公告)号：US07023912B2

公开(公告)日：2006-04-04

申请号：US10223116

申请日：2002-08-19

申请人： Philip Orlik ,  Jinyun Zhang

发明人： Philip Orlik ,  Jinyun Zhang

IPC分类号： H04H7/30

CPC分类号： H04B10/6971

摘要： A method equalizes a received signal in an optical communications system. The received signal is passed through an analog delay line where it is tapped to generate a set of delayed copies of the received signal. In a set of analog multipliers, each delayed copy of the received signal is multiplied by a corresponding weight to generate a set of weighted signals that are then summed to produce an output signal. The output signal is thresholded and subtracted from the output signal to produce an error signal, which is periodically sampled. In a digital weight updating circuit, the weights are produced from digitized versions of the sampled error signal and samples of the delayed copies of the received signal.

摘要翻译： 一种在光通信系统中均衡接收信号的方法。 接收到的信号通过一个模拟延迟线，在该延迟线中，它被抽头以产生一组接收信号的延迟副本。 在一组模拟乘法器中，将接收信号的每个延迟副本乘以相应的权重以产生一组加权信号，然后将它们相加以产生输出信号。 输出信号被阈值化并从输出信号中减去，以产生周期性采样的误差信号。 在数字加权更新电路中，权重由采样误差信号的数字化版本和接收信号的延迟副本的采样产生。

公开(公告)号：US20050111428A1

公开(公告)日：2005-05-26

申请号：US10722031

申请日：2003-11-25

申请人： Philip Orlik ,  Zafer Sahinoglu ,  Jinyun Zhang

发明人： Philip Orlik ,  Zafer Sahinoglu ,  Jinyun Zhang

IPC分类号： H04B1/38 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04W40/10 ,  H04L45/02 ,  H04L45/121 ,  H04W40/28 ,  H04W84/18 ,  Y02D30/20 ,  Y02D70/22 ,  Y02D70/326

摘要： An ad-hoc wireless communication network includes multiple nodes. Each node maintains a routing table. The routing table is constructed by broadcasting route request packets from a source node. The request packet includes an address of a destination node. Intermediate nodes in the network receiving the request packet, determine power and delay cost associated with the intermediate node participating in the route. If the cost is less than a threshold value, then the intermediate node participates in the routing of packets for other nodes. The intermediate node then sends a reply packet back to the source node. The reply packet includes the intermediate node addresses, as well as the power and delay costs. The source can thus construct the routing table. The source node can select a particular node for transferring application data packets based on either the power cost, the delay cost or both costs.

摘要翻译： 自组织无线通信网络包括多个节点。 每个节点维护路由表。 路由表是通过从源节点广播路由请求报文来构建的。 请求分组包括目的地节点的地址。 接收请求分组的网络中的中间节点确定与参与路由的中间节点相关联的功率和延迟成本。 如果成本小于阈值，则中间节点参与其他节点的分组路由。 然后，中间节点将回复分组发送回源节点。 应答包包括中间节点地址，以及功率和延迟成本。 因此，源可以构建路由表。 源节点可以基于电力成本，延迟成本或两者成本来选择用于传送应用数据分组的特定节点。

公开(公告)号：US20120185755A1

公开(公告)日：2012-07-19

申请号：US13007435

申请日：2011-01-14

申请人： Philip Orlik ,  Raymond Yim ,  Kieran Parsons ,  Vahid Tarokh ,  Jinyun Zhang

发明人： Philip Orlik ,  Raymond Yim ,  Kieran Parsons ,  Vahid Tarokh ,  Jinyun Zhang

IPC分类号： H03M13/07 ,  G06F11/10

CPC分类号： H03M13/136 ,  H03M13/3905 ,  H03M13/45 ,  H03M13/458 ,  H04L1/0054

摘要： Soft decision decoding of a codeword of a Reed-Muller (RM) code byselecting an optimal decomposition variable i using a likelihood calculation. A code RM(r, m) is expressed as {(u, uv)|uεRM(r, m−1) and vεRM(r−1, m−1)) where uv denotes a component-wise multiplication of u and v, and (u, uv)=(r1, r2). A receive codeword is separated into r1=u and r2=uv based on the optimal decomposition variable, and r2 is decoded according to the optimal decomposition variable, using a RM(r−1, m−1) decoder to obtain a decoded v and a first set of decoded bits. The decoded v is combined with r1 using (r1+r2v)/2, and(r1+r2V)/2 is decoded using a RM(r, m−1) decoder to obtain a decoded u and a second set of decoded bits.

摘要翻译： 通过使用似然率计算选择最优分解变量i，对Reed-Muller（RM）码的码字进行软判决解码。 代码RM（r，m）表示为{（u，uv）| u＆egr; RM（r，m-1）和v＆egr; RM（r-1，m-1）），其中uv表示分量乘法 的u和v，（u，uv）=（r1，r2）。 基于最优分解变量将接收码字分为r1 = u和r2 = uv，并使用RM（r-1，m-1）解码器根据最优分解变量对r2进行解码，以获得解码的v和 第一组解码位。 使用（r1 + r2v）/ 2将解码的v与r1组合，并且使用RM（r，m-1）解码器对（r1 + r2V）/ 2进行解码，以获得解码的u和第二组解码比特。

公开(公告)号：US07035677B2

公开(公告)日：2006-04-25

申请号：US10347897

申请日：2003-01-21

申请人： Philip Orlik ,  Zafer Sahinoglu ,  Jinyun Zhang

发明人： Philip Orlik ,  Zafer Sahinoglu ,  Jinyun Zhang

IPC分类号： H04B1/38

CPC分类号： H04B7/15557 ,  H04W52/0277 ,  H04W88/04 ,  Y02D70/22 ,  Y02D70/446

摘要： A system and method reduce power consumption in a multi-hop wireless communications network. A signal is received from a source node in an intermediate node. The signal includes a request to relay a message to a destination node. The request includes information on power requirements to relay the message either in a relay mode or a regeneration mode. If the available power at the intermediate node exceeds the power requirements, then the request is accepted. Either the relay mode or the regeneration mode is selected, based on criteria for retransmitting the message, and the message is then relayed to the destination node using the selected mode.

摘要翻译： 一种系统和方法降低了多跳无线通信网络的功耗。 从中间节点中的源节点接收信号。 该信号包括将消息中继到目的地节点的请求。 该请求包括关于在中继模式或再生模式下中继消息的功率需求的信息。 如果中间节点的可用功率超过功率要求，则接受该请求。 基于重发消息的标准来选择中继模式或再生模式，然后使用所选择的模式将消息中继到目的地节点。

公开(公告)号：US08245116B2

公开(公告)日：2012-08-14

申请号：US13007435

申请日：2011-01-14

申请人： Philip Orlik ,  Raymond Yim ,  Kieran Parsons ,  Vahid Tarokh ,  Jinyun Zhang

发明人： Philip Orlik ,  Raymond Yim ,  Kieran Parsons ,  Vahid Tarokh ,  Jinyun Zhang

IPC分类号： H03M13/00

CPC分类号： H03M13/136 ,  H03M13/3905 ,  H03M13/45 ,  H03M13/458 ,  H04L1/0054

摘要： Soft decision decoding of a codeword of a Reed-Muller (RM) code by selecting an optimal decomposition variable i using a likelihood calculation. A code RM(r, m) is expressed as {(u, uv)|uεRM(r, m−1) and vεRM(r−1, m−1)}, where uv denotes a component-wise multiplication of u and v, and (u, uv)=(r1, r2). A receive codeword is separated into r1=u and r2=uv based on the optimal decomposition variable, and r2 is decoded according to the optimal decomposition variable, using a RM(r−1, m−1) decoder to obtain a decoded v and a first set of decoded bits. The decoded v is combined with r1 using (r1+r2v)/2, and (r1+r2v)/2 is decoded using a RM(r, m−1) decoder to obtain a decoded u and a second set of decoded bits.

摘要翻译： 通过使用似然率计算选择最优分解变量i，对Reed-Muller（RM）码的码字进行软判决解码。 代码RM（r，m）表示为{（u，uv）| u＆egr; RM（r，m-1）和v＆egr; RM（r-1，m-1）}，其中uv表示分量 u和v的乘法，（u，uv）=（r1，r2）。 基于最优分解变量将接收码字分为r1 = u和r2 = uv，并使用RM（r-1，m-1）解码器根据最优分解变量对r2进行解码，以获得解码的v和 第一组解码位。 使用（r1 + r2v）/ 2将解码的v与r1组合，并且使用RM（r，m-1）解码器对（r1 + r2v）/ 2进行解码，以获得解码的u和第二组解码比特。

公开(公告)号：US20100165916A1

公开(公告)日：2010-07-01

申请号：US12347166

申请日：2008-12-31

申请人： Chunjie Duan ,  Jinyun Zhang ,  Philip Orlik

发明人： Chunjie Duan ,  Jinyun Zhang ,  Philip Orlik

IPC分类号： H04W84/00

CPC分类号： H04W24/04

摘要： A wireless network with a star topology includes a first central node, a second central node, wherein the first and second nodes are functionally equivalent. A set of leaf nodes are configured to communicate with either the first central node or the second central node via wireless links, depending whether the central nodes are active or inactive.

摘要翻译： 具有星形拓扑的无线网络包括第一中心节点和第二中央节点，其中第一节点和第二节点在功能上相当。 一组叶节点被配置为经由无线链路与第一中心节点或第二中央节点通信，这取决于中央节点是活动还是非活动。