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1. 发明授权

US08023915B2 Beamforming in wireless vehicular networks 有权
标题翻译：无线车载网络中的波束成形
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。

2. 发明申请

US20100248672A1 Beamforming in Wireless Vehicular Networks 有权
标题翻译：无线车载网络中的波束成形
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。

3. 发明申请

US20110176624A1 OFDM Networks with Pseudo-Random Phase Precoding 有权
标题翻译：具有伪随机相位预编码的OFDM网络
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。

4. 发明授权

US08290074B2 OFDM networks with pseudo-random phase precoding 有权
标题翻译：具有伪随机相位预编码的OFDM网络
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。

5. 发明申请

US20120002753A1 Method for Encoding Data Symbols with Implicitly Embedded Pilot Symbols in Resource Blocks for Wireless Networks 有权
标题翻译：用于在无线网络的资源块中用隐式嵌入式导频符号编码数据符号的方法
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。

6. 发明申请

US20100272014A1 Parametric Compression of Rank-1 Analog Feedback 失效
标题翻译：等级-1模拟反馈的参数压缩
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。

7. 发明授权

US08284862B2 Method for encoding data symbols with implicitly embedded pilot symbols in resource blocks for wireless networks 有权
标题翻译：用于在无线网络的资源块中用隐含嵌入的导频符号对数据符号进行编码的方法
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。

8. 发明授权

US08238277B2 Parametric compression of rank-1 analog feedback 失效
标题翻译：等级-1模拟反馈的参数压缩
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。

9. 发明申请

US20120140922A1 Method for Generating Private Keys in Wireless Networks 有权
标题翻译：在无线网络中生成私钥的方法
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。

10. 发明公开

US20230291511A1 Method and Apparatus for Multi-Dimensional Complex-Valued Sample Encoding and Decoding 审中-公开
公开(公告)号：US20230291511A1
公开(公告)日：2023-09-14
申请号：US17691663
申请日：2022-03-10
申请人： Ramesh Annavajjala , Kuntal Chowdhury
发明人： Ramesh Annavajjala , Kuntal Chowdhury
IPC分类号： H04L5/00 , G01S13/04
CPC分类号： H04L5/0023 , G01S13/04
摘要： Complex-valued waveform samples in time-domain, frequency-domain and spatial-domain are organized into a plurality of dimensions. A vector of complex-valued samples is extracted from a multidimensional sample buffer. An input transform is applied to a vector of complex-valued samples to produce two vectors of real-valued samples. Each real-valued sample vector is processed to produce a two-dimensional codebook matrix and to generate a vector of indices into the columns of the generated codebook. The two indices vectors are merged to produce an encoded index stream. The encoded index stream along with the two codebooks is used to produce real-valued sample vectors. An output transform is applied to two real-valued sample vectors to produce a vector of complex-valued samples.

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