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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。
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12.发明公开公开(公告)号：US20230262485A1
公开(公告)日：2023-08-17
申请号：US17671456
申请日：2022-02-14
CPC分类号： H04W24/02 , H04B7/0617 , H04W28/06 , G01S7/02
摘要： A plurality of radar sensors and radio units are controlled and processed by a signal processing unit (SPU). Each radar sensor receives configuration, control, power management, and calibration messages along with compressed data stream for transmission from the SPU over a multi Giga-bit interface (MGBI). Each radar sensor transmits status messages and compressed received data stream to the SPU over an MGBI. The SPU performs radar signal processing and tracking upon decompressing the data stream received from the radar sensor. Each radio unit receives configuration, control, power management, and calibration messages along with compressed frequency-domain waveform samples for each transmitter antenna port and for each component carrier configured by the SPU over an MGBI. Each radio unit transmits status messages along with compressed calibration data and compressed frequency-domain waveform samples for each receive antenna port and for each component carrier configured by the SPU over an MGBI. The SPU decompresses the frequency-domain waveform samples, and performs radio baseband signal processing including channel estimation, transmit beamforming, and receive beamforming. The SPU establishes and maintains time synchronization with each radar sensor and radio unit connected to it over an MGBI.
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公开(公告)号：US20120082252A1
公开(公告)日：2012-04-05
申请号：US12894994
申请日：2010-09-30
申请人： Ramesh Annavajjala , Hobin Kim
发明人： Ramesh Annavajjala , Hobin Kim
IPC分类号： H04L27/28
CPC分类号： H04L5/0048 , H04L5/0007 , H04L25/0204 , H04L25/0212 , H04L25/022 , H04L25/0228 , H04L25/0242
摘要： Time-varying and frequency-selective channels in an orthogonal frequency division multiplexing (OFDM) network are estimated by first storing, in a buffer at a receiver, a received signal corresponding to a set of pilot tones of a set of OFDM symbols, wherein the pilot tones are predetermined and inserted in frequency subcarriers and time slots of the OFDM symbol. A covariance matrix of the received signal is estimated. A diagonal matrix is estimated based on the covariance matrix and a variance of noise in the received signal. The diagonal matrix indicates delays of non-zero paths in a time domain. A channel impulse response (CIR) for each OFDM symbol is estimated using the diagonal matrix, and the received signal. Then, the CIR is transformed to the frequency domain to obtain the channel frequency response (CFR).
摘要翻译： 通过首先在接收机的缓冲器中存储对应于一组OFDM符号的一组导频音调的接收信号来估计正交频分复用（OFDM）网络中的时变和频率选择性信道，其中， 导频音被预先确定并插入在OFDM符号的频率子载波和时隙中。 估计接收信号的协方差矩阵。 基于协方差矩阵和接收信号中的噪声方差来估计对角矩阵。 对角矩阵表示时域中非零路径的延迟。 使用对角矩阵和接收信号来估计每个OFDM符号的信道脉冲响应（CIR）。 然后，将CIR转换到频域以获得信道频率响应（CFR）。
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公开(公告)号：US20110176624A1
公开(公告)日：2011-07-21
申请号：US12691291
申请日：2010-01-21
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。
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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
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。
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公开(公告)号：US20230305140A1
公开(公告)日：2023-09-28
申请号：US17682780
申请日：2022-02-28
CPC分类号： G01S13/872 , G01S13/726
摘要： Radar signal processing is performed using a plurality of signal processing units onboard a radar sensor unit. One of the signal processing units is designated as the primary processor whereas the remaining signal processing units are designated as secondary processors. Secondary processors, based on their configuration and capability, perform a subset of radar signal processing tasks. Secondary processors transmit a compressed bit stream of their partially processed results to the primary processor. The primary processor decompresses the bit streams received from a plurality of secondary processors, incorporates the partially processed results from a plurality of secondary processors with its locally processed results, performs final detections, and sends the final detections to a remote processor. When secondary processors perform detections in range, Doppler, and angle domains, and sends those to the primary processor, the primary processor employs consensus detection to produce final detections.
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公开(公告)号：US20230305129A1
公开(公告)日：2023-09-28
申请号：US17703641
申请日：2022-03-24
IPC分类号： G01S13/04
CPC分类号： G01S13/04
摘要： Multi-channel compressed analog-to-digital (ADC) samples along with compressed calibration data received from the radar unit are de-compressed on the centralized signal processing unit prior to calibration compensation and DC-offset removal. Time-domain samples on each antenna channel are processed into range-domain samples and range-Doppler samples using windowing and FFT operations. For each range-domain sample, angle-domain samples are generated by performing windowing and angle-domain FFT operation over antenna channels. Joint object detection is performed separately on de-compressed ADC samples, range-domain samples, range-Doppler samples, or range-angle samples to provide detection metrics and confidence levels for each detected object.
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公开(公告)号：US20230283667A1
公开(公告)日：2023-09-07
申请号：US17667612
申请日：2022-02-09
CPC分类号： H04L67/12 , G01S7/0236 , H01Q21/061 , G06K9/6289
摘要： A plurality of sensors are controlled and processed by an electronic control unit (ECU). Each sensor compresses the raw data samples, encapsulates them into IP packets, and transmits them to the ECU over the Ethernet transport. The ECU decompresses the IP packets, and individually performs sensor-specific signal processing prior to performing multi-modal sensor fusion. Additionally, if the underlying sensor is a Radar sensor, the ECU performs interference detection, interference mitigation, interference management, transmits compressed beamforming weights to enable transmit beamforming on the Radar sensor.
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公开(公告)号：US08483387B2
公开(公告)日：2013-07-09
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： H04L29/06
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。
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公开(公告)号：US08290074B2
公开(公告)日：2012-10-16
申请号：US12691291
申请日：2010-01-21
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。
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