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    • 2. 发明申请
    • Cooperative Subspace Demultiplexing in Content Delivery Networks
    • 内容交付网络中的合作子空间解复用
    • US20140146924A1
    • 2014-05-29
    • US14168466
    • 2014-01-30
    • Steve J. Shattil
    • Steve J. Shattil
    • H04L1/06
    • H04L1/0681H04B7/026H04J13/0003H04J13/004H04L1/0077H04L5/0021H04L27/2601H04L27/2602H04L27/2614H04L45/24H04L2001/0097H04W52/346H04W72/046
    • A source node selects a plurality of original data components to transfer to at least one destination node. A plurality of transmitting nodes cooperatively encodes the original data components to generate a plurality of subspace coded components and a corresponding code matrix. Each of the transmitting nodes transmits a subset of the plurality of subspace coded components and corresponding code matrix, wherein at least one of the transmitting nodes has a rank that is insufficient for decoding the plurality of subspace coded components. A destination node may employ a plurality of receiving nodes to cooperatively receive a plurality of subspace coded components and their corresponding code vectors, wherein the rank of at least one of the receiving nodes is insufficient for decoding the subspace coded components. The destination node builds up the dimension of the subspace spanned by code vectors it collects from the receiving nodes and then decodes the subspace coded components.
    • 源节点选择多个原始数据分量以传送到至少一个目的地节点。 多个发送节点协作地对原始数据分量进行编码以产生多个子空间编码分量和相应的代码矩阵。 每个发送节点发送多个子空间编码分量的子集和相应的代码矩阵,其中发送节点中的至少一个具有不足以解码多个子空间编码分量的等级。 目的地节点可以使用多个接收节点来协作地接收多个子空间编码分量及其对应的码矢量,其中至少一个接收节点的秩不足以解码子空间编码分量。 目的地节点通过从接收节点收集的代码向量构建子空间的维度,然后解码子空间编码的组件。
    • 9. 发明授权
    • LPI/LPD communication systems
    • LPI / LPD通信系统
    • US08929550B2
    • 2015-01-06
    • US13757032
    • 2013-02-01
    • Steve J ShattilRobi Sen
    • Steve J ShattilRobi Sen
    • H04K1/00H04W12/08
    • H04W72/082H04B7/0456H04L5/0007H04L5/0055H04L9/0875H04L63/0435H04L63/061H04W12/04H04W12/08H04W16/14
    • A node in a first network requests a communication channel from a second network. Upon receiving a channel assignment, nodes in the first network employ the assigned channel for communicating in a manner that is transparent to the second network. A transmitting node selects a decoy data signal as a carrier signal, synthesizes data-bearing channel distortions; and distorts the carrier signal with the channel distortions prior to transmission. An undistorted version of the decoy data may be transmitted to an intended receiver. The receiver distinguishes between the synthesized data-bearing channel distortions and natural channel distortions to decrypt the data. In a MIMO system, the transmitter generates a MIMO precoding matrix from a message to be sent to the receiver and multiplies the decoy data signal vector with the MIMO precoding matrix.
    • 第一网络中的节点从第二网络请求通信信道。 在接收到信道分配后,第一网络中的节点以对第二网络透明的方式采用分配的信道进行通信。 发射节点选择诱饵数据信号作为载波信号,合成数据承载信道失真; 并在传输之前使信道失真导致载波信号失真。 诱饵数据的未失真版本可以被发送到预期的接收器。 接收机区分合成的数据承载信道失真和自然信道失真来解密数据。 在MIMO系统中,发射机从要发送到接收机的消息生成MIMO预编码矩阵,并将诱饵数据信号向量与MIMO预编码矩阵相乘。
    • 10. 发明授权
    • Cancellation system for frequency reuse in microwave communications
    • 微波通信中频率重用取消系统
    • US07477921B2
    • 2009-01-13
    • US11872240
    • 2007-10-15
    • Steve J. Shattil
    • Steve J. Shattil
    • H04M1/00
    • H01Q3/26G01S3/04H01Q21/06H04B1/525H04B7/0613H04B7/086
    • Substantial improvements in frequency reuse in microwave communications systems is achieved by canceling co-channel interference and transmitter leakage. Interferometric beam-narrowing reduces beamwidth without reducing peak magnitude of the beam pattern. Frequency-dependent beam-shaping compensates for frequency-dependent distortions of the beam pattern thereby improving bandwidth. A spatial demultiplexing technique utilizes spatial gain distributions of received signals to separate signals, even from co-located transmit sources, and uses microwave lensing to enhance received spatial gain distributions. Predetermined cross-polarization interference is used to separate differently-polarized receive signals. A reference branch provides a cancellation signal to a receiver to cancel transmitter leakage signals. An error signal controls an impedance-compensation circuit that is responsive to changes in antenna impedance but not to receive signals. A dc bias magnetic field applied to a magnetic permeable material adjusts non-linear distortion in a cancellation circuit for canceling distortion in a transmitter leakage signal. Discreet impedance elements approximate a circuit having distributed impedance.
    • 通过消除同信道干扰和发射机泄漏来实现微波通信系统中频率重用的实质性改进。 干涉波束窄化减少波束宽度,而不减少波束图案的峰值幅度。 频率依赖的波束整形补偿波束图案的频率相关失真,从而提高带宽。 空间解复用技术利用接收信号的空间增益分布来分离信号,甚至从同位置的发射源,并使用微波透镜增强接收的空间增益分布。 使用预定的交叉极化干扰来分离不同极化的接收信号。 参考分支向接收器提供消除信号以消除发射器泄漏信号。 误差信号控制阻抗补偿电路,其响应天线阻抗的变化而不接收信号。 施加到可透磁材料的直流偏置磁场调节消除电路中的非线性失真,以消除发射器泄漏信号中的失真。 离散阻抗元件近似于具有分布阻抗的电路。