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：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：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：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：US20120170684A1

公开(公告)日：2012-07-05

申请号：US12982636

申请日：2010-12-30

申请人： Raymond Yim ,  Amitav Mukherjee ,  Philip V. Orlik ,  Chunjie Duan ,  Jinyun Zhang

发明人： Raymond Yim ,  Amitav Mukherjee ,  Philip V. Orlik ,  Chunjie Duan ,  Jinyun Zhang

IPC分类号： H04B1/06

CPC分类号： H04L25/0204 ,  H04L25/0228 ,  H04L25/03159

摘要： A method estimates a wireless channel at a receiver. The signal is transmitted using narrowband orthogonal frequency division demultiplexing (OFDM) and frequency subcarriers, and the signal includes a set of data tones and a set of pilot tones. The channel and pilot tone interference are estimated based on all the pilot tones extracted from the signal and a channel model. The set of data are equalized based on the channel estimate. Data interference is detected according to the pilot interference and the equalized data tones. Subcarrier interference-to-noise ratios are determined based on the data interference. Signal strengths of the data tones are determined based on the equalized data tones, log-likelihood ratios of bits represented by the data tones are determined based on the subcarrier interference-to-noise ratios and the signal strength of the data tones.

摘要翻译： 一种方法估计接收机处的无线信道。 该信号使用窄带正交频分解复用（OFDM）和频率副载波来发送，并且该信号包括一组数据音调和一组导频音。 基于从信号提取的所有导频音和信道模型来估计信道和导频音干扰。 该数据集合基于信道估计来均衡。 根据导频干扰和均衡数据音调检测数据干扰。 基于数据干扰确定子载波干扰噪声比。 基于均衡的数据音调确定数据音调的信号强度，基于副载波干扰信噪比和数据音调的信号强度来确定由数据音调表示的比特的对数似然比。

公开(公告)号：US08428165B2

公开(公告)日：2013-04-23

申请号：US12982636

申请日：2010-12-30

申请人： Raymond Yim ,  Amitav Mukherjee ,  Philip V. Orlik ,  Chunjie Duan ,  Jinyun Zhang

发明人： Raymond Yim ,  Amitav Mukherjee ,  Philip V. Orlik ,  Chunjie Duan ,  Jinyun Zhang

IPC分类号： H04B1/10 ,  H04L27/28

CPC分类号： H04L25/0204 ,  H04L25/0228 ,  H04L25/03159

摘要： A method estimates a wireless channel at a receiver. The signal is transmitted using narrowband orthogonal frequency division demultiplexing (OFDM) and frequency subcarriers, and the signal includes a set of data tones and a set of pilot tones. The channel and pilot tone interference are estimated based on all the pilot tones extracted from the signal and a channel model. The set of data are equalized based on the channel estimate. Data interference is detected according to the pilot interference and the equalized data tones. Subcarrier interference-to-noise ratios are determined based on the data interference. Signal strengths of the data tones are determined based on the equalized data tones, log-likelihood ratios of bits represented by the data tones are determined based on the subcarrier interference-to-noise ratios and the signal strength of the data tones.

摘要翻译： 一种方法估计接收机处的无线信道。 该信号使用窄带正交频分解复用（OFDM）和频率副载波来发送，并且该信号包括一组数据音调和一组导频音。 基于从信号提取的所有导频音和信道模型来估计信道和导频音干扰。 该数据集合基于信道估计来均衡。 根据导频干扰和均衡数据音调检测数据干扰。 基于数据干扰确定子载波干扰噪声比。 基于均衡的数据音调确定数据音调的信号强度，基于副载波干扰信噪比和数据音调的信号强度来确定由数据音调表示的比特的对数似然比。

公开(公告)号：US20120147864A1

公开(公告)日：2012-06-14

申请号：US12964283

申请日：2010-12-09

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

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

IPC分类号： H04W84/02

CPC分类号： B66B13/22 ,  H04W84/047

摘要： A hybrid communication network for a transportation safety system includes a wired network including a set of fixed nodes. Each fixed node includes a wired interface for connecting the fixed node to the wired network and at least one wireless interface. The set of fixed nodes further includes a head node at a first end of the wired network connected to a controller, a terminal node at a second end of the wired network, and a set of relay nodes arranged between the head node and the terminal node. A wireless network includes a set of mobile nodes and a set of fixed nodes connected to the wired network. Each mobile node includes at least one of the wireless interfaces, and each mobile node is arranged in a moveable car.

摘要翻译： 用于运输安全系统的混合通信网络包括包括一组固定节点的有线网络。 每个固定节点包括用于将固定节点连接到有线网络和至少一个无线接口的有线接口。 所述固定节点集合还包括连接到控制器的有线网络的第一端的头节点，有线网络的第二端的终端节点以及布置在所述头节点和所述终端节点之间的一组中继节点 。 无线网络包括一组移动节点和连接到有线网络的一组固定节点。 每个移动节点包括无线接口中的至少一个，并且每个移动节点被布置在可移动的车中。

公开(公告)号：US08418813B2

公开(公告)日：2013-04-16

申请号：US12950683

申请日：2010-11-19

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

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

IPC分类号： B66B1/28

CPC分类号： B66B1/34 ,  B66B5/0031 ,  B66B13/22

摘要： In a network for a safety system in a transportation system, the transportation system includes a shaft and a car arranged in the shaft. A first wall node is at a first end of the shaft and a second wall node is at a second end of the shaft to communicate safety messages with the car. Each wall node includes at least one wireless transceiver connected to one or more antennas. Each car in the shaft includes at least two wireless transceiver connected to one or more antennas, wherein the first transceiver of the car uses a first frequency and the second transceiver of the car uses a second frequency to communicate each safety messages in duplicate. A wired backbone connects the set of wall nodes to a controller of the safety system of the transportation system.

摘要翻译： 在用于运输系统中的安全系统的网络中，运输系统包括布置在轴中的轴和轿厢。 第一壁节点位于轴的第一端，并且第二壁节点位于轴的第二端，以将安全信息与轿厢通信。 每个墙壁节点包括连接到一个或多个天线的至少一个无线收发器。 轴中的每个汽车包括连接到一个或多个天线的至少两个无线收发器，其中汽车的第一收发器使用第一频率，并且汽车的第二收发器使用第二频率来重复地传送每个安全消息。 有线骨干将该组墙壁节点连接到运输系统的安全系统的控制器。

公开(公告)号：US20120147879A1

公开(公告)日：2012-06-14

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： H04W72/04 ,  H04W56/00

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。