公开(公告)号：US20120002753A1

公开(公告)日：2012-01-05

申请号：US12827591

申请日：2010-06-30

申请人： Ramesh Annavajjala ,  Philip V. Orlik

发明人： Ramesh Annavajjala ,  Philip V. Orlik

IPC分类号： H04L27/00 ,  H04L27/36

CPC分类号： H04L5/0023 ,  H04L1/0606 ,  H04L1/0618 ,  H04L5/0048 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/345 ,  H04L2025/03426

摘要： A set of data symbols is selected from a set of modulation constellation, and a sample-mean of the set of data symbols is determined. Each data symbol is first shifted by the sample-mean to obtain a shifted data symbol, and then the shifted symbol is multiplied by a first constant to obtain a scaled data symbol. A second constant is added to the scaled data symbol to obtain a mapped data symbol. The sample-mean is multiplied by a third constant to obtain a sample-mean mapped symbol. The set of mapped data symbols and the sample-mean mapped symbol are then transmitted as a resource block.

摘要翻译： 从一组调制星座中选择一组数据符号，并且确定该组数据符号的采样均值。 首先将每个数据符号移位采样均值以获得移位的数据符号，然后将移位符号乘以第一常数以获得缩放的数据符号。 将第二常数添加到缩放的数据符号以获得映射的数据符号。 将样本均值乘以第三常数以获得样本均值映射符号。 然后将映射数据符号集合和采样均值映射符号作为资源块发送。

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：US20100272014A1

公开(公告)日：2010-10-28

申请号：US12732275

申请日：2010-03-26

申请人： Philip V. Orlik ,  Ron Porat ,  Ramesh Annavajjala ,  Man-On Pun

发明人： Philip V. Orlik ,  Ron Porat ,  Ramesh Annavajjala ,  Man-On Pun

IPC分类号： H04W40/00

CPC分类号： H04B7/0417 ,  H04B7/0469 ,  H04B7/0626 ,  H04B7/0636 ,  H04B7/0663

摘要： Channel state information in a closed-loop, multiple-input, multiple-output wireless networks is fed back from each mobile station to a base station by first determining a transmit covariance matrix R, and applying a singular value decomposition (SVD) R=UΣVH, where U, V are left and right singular vector matrices, Σ is a diagonal matrix with singular values. The matrix V includes column vectors V. A beamforming vector vmax=[1 exp(jΦ)exp(j2Φ) . . . exp(jΦ)]/√{square root over (N)}] is approximated by the column vector V having a maximum magnitude, where Φ is a real number. Then, only the angle Φ is fed back using a phase modulation mapping of the components exp(jΦ) onto the associated subcarrier.

摘要翻译： 闭环多输入多输出无线网络中的信道状态信息通过首先确定发射协方差矩阵R，从每个移动台反馈到基站，并应用奇异值分解（SVD）R = U＆Sgr ; VH，其中U，V是左和右奇异矢量矩阵，＆Sgr; 是具有奇异值的对角矩阵。 矩阵V包括列向量V.波束形成向量vmax = [1exp（jΦ）exp（j2Φ））。 。 。 exp（jΦ）] /√{平方根（N）}]由具有最大幅度的列向量V近似，其中Φ是实数。 然后，仅使用分量exp（jΦ）的相位调制映射到相关联的子载波上来反馈角度Φ。

公开(公告)号：US20110176624A1

公开(公告)日：2011-07-21

申请号：US12691291

申请日：2010-01-21

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

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

IPC分类号： H04L27/28

CPC分类号： H04L27/2697

摘要： In an orthogonal frequency division multiplexing (OFDM) network, a set of pseudo random sequences (PRS) are stored at a transmitter and a receiver. Each OFDM symbol is mapped to subcarriers for a set of transmit antennas to produce a mapped symbol. The mapped symbol is encoded using a pseudo-random phase precoder (PRPP) and the PRS to produce a precoded symbol. An inverse fast Fourier transform (IFFT) is applied to the precoded symbol, and the encoded symbol is transmitted to the receiver using the set of transmit antennas.

摘要翻译： 在正交频分复用（OFDM）网络中，一组伪随机序列（PRS）被存储在发射机和接收机。 每个OFDM符号被映射到一组发射天线的子载波以产生映射符号。 使用伪随机相位预编码器（PRPP）和PRS对映射符号进行编码以产生预编码符号。 将快速傅里叶逆变换（IFFT）应用于预编码符号，并且使用该组发射天线将编码符号发送到接收机。

公开(公告)号：US20100248672A1

公开(公告)日：2010-09-30

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：US08290074B2

公开(公告)日：2012-10-16

申请号：US12691291

申请日：2010-01-21

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

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

IPC分类号： H04K1/10

CPC分类号： H04L27/2697

摘要： In an orthogonal frequency division multiplexing (OFDM) network, a set of pseudo random sequences (PRS) are stored at a transmitter and a receiver. Each OFDM symbol is mapped to subcarriers for a set of transmit antennas to produce a mapped symbol. The mapped symbol is encoded using a pseudo-random phase precoder (PRPP) and the PRS to produce a precoded symbol. An inverse fast Fourier transform (IFFT) is applied to the precoded symbol, and the encoded symbol is transmitted to the receiver using the set of transmit antennas.

摘要翻译： 在正交频分复用（OFDM）网络中，一组伪随机序列（PRS）被存储在发射机和接收机。 每个OFDM符号被映射到一组发射天线的子载波以产生映射符号。 使用伪随机相位预编码器（PRPP）和PRS对映射符号进行编码以产生预编码符号。 将快速傅里叶逆变换（IFFT）应用于预编码符号，并且使用该组发射天线将编码符号发送到接收机。

公开(公告)号：US08284862B2

公开(公告)日：2012-10-09

申请号：US12827591

申请日：2010-06-30

申请人： Ramesh Annavajjala ,  Philip V. Orlik

发明人： Ramesh Annavajjala ,  Philip V. Orlik

IPC分类号： H04L27/36

CPC分类号： H04L5/0023 ,  H04L1/0606 ,  H04L1/0618 ,  H04L5/0048 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/345 ,  H04L2025/03426

摘要： A set of data symbols is selected from a set of modulation constellation, and a sample-mean of the set of data symbols is determined. Each data symbol is first shifted by the sample-mean to obtain a shifted data symbol, and then the shifted symbol is multiplied by a first constant to obtain a scaled data symbol. A second constant is added to the scaled data symbol to obtain a mapped data symbol. The sample-mean is multiplied by a third constant to obtain a sample-mean mapped symbol. The set of mapped data symbols and the sample-mean mapped symbol are then transmitted as a resource block.

摘要翻译： 从一组调制星座中选择一组数据符号，并且确定该组数据符号的采样均值。 首先将每个数据符号移位采样均值以获得移位的数据符号，然后将移位符号乘以第一常数以获得缩放的数据符号。 将第二常数添加到缩放的数据符号以获得映射的数据符号。 将样本均值乘以第三常数以获得样本均值映射符号。 然后将映射数据符号集合和采样均值映射符号作为资源块发送。

公开(公告)号：US08238277B2

公开(公告)日：2012-08-07

申请号：US12732275

申请日：2010-03-26

申请人： Philip V. Orlik ,  Ron Porat ,  Ramesh Annavajjala ,  Man-On Pun

发明人： Philip V. Orlik ,  Ron Porat ,  Ramesh Annavajjala ,  Man-On Pun

IPC分类号： H04B7/00 ,  H04W4/00

CPC分类号： H04B7/0417 ,  H04B7/0469 ,  H04B7/0626 ,  H04B7/0636 ,  H04B7/0663

摘要： Channel state information in a closed-loop, multiple-input, multiple-output wireless networks is fed back from each mobile station to a base station by first determining a transmit covariance matrix R, and applying a singular value decomposition (SVD) R=UΣVH, where U, V are left and right singular vector matrices, Σ is a diagonal matrix with singular values. The matrix V includes column vectors V. A beamforming vector vmax=[1 exp(jΦ)exp(j2Φ) . . . exp(jΦ)]/√{square root over (N)}] is approximated by the column vector V having a maximum magnitude, where Φ is a real number. Then, only the angle Φ is fed back using a phase modulation mapping of the components exp(jΦ) onto the associated subcarrier.

摘要翻译： 闭环多输入多输出无线网络中的信道状态信息通过首先确定发射协方差矩阵R，从每个移动台反馈到基站，并应用奇异值分解（SVD）R = U＆Sgr ; VH，其中U，V是左和右奇异矢量矩阵，＆Sgr; 是具有奇异值的对角矩阵。 矩阵V包括列向量V.波束形成向量vmax = [1exp（jΦ）exp（j2Φ））。 。 。 exp（jΦ）] /√{平方根（N）}]由具有最大幅度的列向量V近似，其中Φ是实数。 然后，仅使用分量exp（jΦ）的相位调制映射到相关联的子载波上来反馈角度Φ。

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。