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：US08139668B2

公开(公告)日：2012-03-20

申请号：US12503465

申请日：2009-07-15

申请人： Philip V. Orlik ,  Lu Zhang ,  Raymond Yim ,  Jinyun Zhang

发明人： Philip V. Orlik ,  Lu Zhang ,  Raymond Yim ,  Jinyun Zhang

IPC分类号： H04L5/12 ,  H04B7/02 ,  H03C7/02

CPC分类号： H04L1/065 ,  H04L1/0003 ,  H04L25/0212 ,  H04L25/0226

摘要： A transmitter encodes an input bitstream using space-time trellis coding (STTC). The encoder includes a serial to parallel convertor to produce a first and second output bitstreams. First and second three bit shift registers are connected to produce first and second output bitstreams. A multiplier applies a code generating weight to each bit of the shift registers to encode the bitstreams. A first switch is connected between a last bit of the first shift register and a first bit of the second shift register. A second switch is connected between the second output and the first bit of the second shift register. The first set of encoded bit streams and the second set of encoded bitstreams are combined and mapped to a frequency domain.

摘要翻译： 发射机使用空时网格编码（STTC）对输入比特流进行编码。 编码器包括串行到并行转换器以产生第一和第二输出比特流。 连接第一和第二三位移位寄存器以产生第一和第二输出比特流。 乘法器将代码生成权重应用于移位寄存器的每个位以对比特流进行编码。 第一开关连接在第一移位寄存器的最后位和第二移位寄存器的第一位之间。 第二开关连接在第二输出端和第二移位寄存器的第一位之间。 第一组编码比特流和第二组编码比特流被组合并映射到频域。

公开(公告)号：US08023915B2

公开(公告)日：2011-09-20

申请号：US12413868

申请日：2009-03-30

申请人： Philip V. Orlik ,  Raymond Yim ,  Ramesh Annavajjala ,  Jinyun Zhang

发明人： Philip V. Orlik ,  Raymond Yim ,  Ramesh Annavajjala ,  Jinyun Zhang

IPC分类号： H04B1/06 ,  H04B7/00

CPC分类号： H04B7/0617 ,  H04B7/086

摘要： Beams are used to communicate in a wireless network including mobile and stationary receivers. The network operates according to the IEEE 802.11p in wireless access to vehicular environments (WAVE). A direction from the mobile transceiver to the stationary receiver is predicted using geographic information available to the mobile transceiver. A set of signals are received in the mobile transceiver from the stationary transceiver, wherein the signals are received by an array of antennas, and wherein the signals are received using a set of beams, and wherein each beam is approximately directed at the stationary receiver. A signal-to-noise ratio (SNR) is measured for each beam, and the beam with an optimal SNR is selected as an optimal beam for communicating data between the mobile transceiver and the stationary transceiver.

摘要翻译： 光束用于在包括移动和固定接收机的无线网络中进行通信。 该网络根据IEEE 802.11p在无线接入车辆环境（WAVE）中运行。 使用可用于移动收发机的地理信息来预测从移动收发机到固定接收机的方向。 在固定收发器中的移动收发器中接收一组信号，其中信号由天线阵列接收，并且其中使用一组波束接收信号，并且其中每个波束近似地指向固定接收机。 测量每个波束的信噪比（SNR），并且选择具有最佳SNR的波束作为用于在移动收发器和固定收发器之间传送数据的最佳波束。

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：US20100208690A1

公开(公告)日：2010-08-19

申请号：US12370750

申请日：2009-02-13

申请人： Jianlin Guo ,  Raymond Yim ,  Jinyun Zhang

发明人： Jianlin Guo ,  Raymond Yim ,  Jinyun Zhang

IPC分类号： H04W36/00

CPC分类号： H04W36/0055 ,  H04W36/0038

摘要： A method performs handover of a mobile station (MS from a current base station (BSC) connected to a target base station (BST) via a backbone in a Worldwide interoperability for Microwave Access (WiMAX) mobile communication network. The MS, before handover, transmits a Connection Identifier Request (CID-REQ) to the BST via the BSC, and receiving a Connection Identifier Response (CID-RSP) from the BST via the BSC. The MS, before handover, transmits a Subscriber Station (SS) Basic Capability Request (SBC-REQ), and receives a SS Basic Capability Response (SBC-RSP) from the BST via the BSC. Then, the MS transmits a Ranging Request (RNG-REQ) to the BST, and receives a Ranging Response (RNG-RSP) from the BST. During the handover, the MS transmits a Registration Request (REG-REQ) to the BST, and receives a Registration Response from the BST to establish the connection between the MS and the BST.

摘要翻译： 一种方法是在全球微波接入（WiMAX）移动通信网络的互操作性中，经由骨干网执行移动台（来自连接到目标基站（BST）的当前基站（BSC））的切换， 通过BSC向BST发送连接标识符请求（CID-REQ），并通过BSC从BST接收连接标识符响应（CID-RSP），MS在切换之前发送用户站（SS）基本能力 请求（SBC-REQ），并通过BSC从BST接收SS基本能力响应（SBC-RSP），然后MS向BST发送测距请求（RNG-REQ），并接收测距响应（RNG -RSP），在切换期间，MS向BST发送注册请求（REG-REQ），并从BST接收注册响应以建立MS与BST之间的连接。

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：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：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：US20100327064A1

公开(公告)日：2010-12-30

申请号：US12640949

申请日：2009-12-17

申请人： Raymond Yim ,  Samuel David Perli ,  Fatih Porikli ,  Jinyun Zhang

发明人： Raymond Yim ,  Samuel David Perli ,  Fatih Porikli ,  Jinyun Zhang

IPC分类号： G06K19/06 ,  G06K7/10

CPC分类号： G06K7/14 ,  G06K7/1417 ,  G06K7/1473

摘要： Symbols in information are encoded as a codeword using a differential orthogonal code. The codeword is stored in a substrate. A moving sensor acquires an image of the codeword in the substrate and decodes the codeword using a balanced differential decoder. The codeword can be painted as lane markings on a road surface.

摘要翻译： 使用差分正交码将信息中的符号编码为码字。 码字被存储在基板中。 移动传感器获取衬底中的码字的图像，并使用平衡差分解码器解码码字。 码字可以作为道路表面上的车道标记来绘制。

公开(公告)号：US20100246703A1

公开(公告)日：2010-09-30

申请号：US12503465

申请日：2009-07-15

申请人： Philip V. Orlik ,  Lu Zhang ,  Raymond Yim ,  Jinyun Zhang

发明人： Philip V. Orlik ,  Lu Zhang ,  Raymond Yim ,  Jinyun Zhang

IPC分类号： H04L23/02

CPC分类号： H04L1/065 ,  H04L1/0003 ,  H04L25/0212 ,  H04L25/0226

摘要： A transmitter encodes an input bitstream using space-time trellis coding (STTC). The encoder includes a serial to parallel convertor to produce a first and second output bitstreams. First and second three bit shift registers are connected to produce first and second output bitstreams. A multiplier applies a code generating weight to each bit of the shift registers to encode the bitstreams. A first switch is connected between a last bit of the first shift register and a first bit of the second shift register. A second switch is connected between the second output and the first bit of the second shift register. The first set of encoded bit streams and the second set of encoded bitstreams are combined and mapped to a frequency domain.

摘要翻译： 发射机使用空时网格编码（STTC）对输入比特流进行编码。 编码器包括串行到并行转换器以产生第一和第二输出比特流。 连接第一和第二三位移位寄存器以产生第一和第二输出比特流。 乘法器将代码生成权重应用于移位寄存器的每个位以对比特流进行编码。 第一开关连接在第一移位寄存器的最后位和第二移位寄存器的第一位之间。 第二开关连接在第二输出端和第二移位寄存器的第一位之间。 第一组编码比特流和第二组编码比特流被组合并映射到频域。