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33 条记录 (耗时 0.022 秒)

    Low Complexity Receiver and Method for Low Density Signature Modulation
    13.
    发明申请
    Low Complexity Receiver and Method for Low Density Signature Modulation 有权
    低复杂度接收机和低密度签名调制方法

    公开(公告)号：US20140269663A1

    公开(公告)日：2014-09-18

    申请号：US14212583

    申请日：2014-03-14

    申请人： FutureWei Technologies, Inc.

    发明人： Hosein Nikopour ,  Alireza Bayesteh ,  Mohammadhadi Baligh

    IPC分类号： H04B7/26

    CPC分类号： H04B1/707 ,  H04J13/0007

    摘要： Method and apparatus embodiments are provided for low complexity message passing algorithm (MPA) detection with substantially minor or tolerated performance loss compared to the standard MPA. A method includes calculating, at a detector, a plurality of function nodes (FNs) according to a plurality of received multiplexing signals for a one or a plurality of user equipments (UEs) using a plurality of first MPA computations that map a plurality of variable nodes (VNs) corresponding to the UEs to the FNs and using a priori information in an initial vector of probabilities for each of the VNs, excluding from the first MPA computations a plurality of first relatively small multiplication terms, updating the probabilities for the VNs using the last calculated FNs and a plurality of second MPA computations that map the FNs to the VNs, and excluding a plurality of second relatively small multiplication terms from the second MPA calculations.

    摘要翻译： 提供了与标准MPA相比具有基本上较小或容忍的性能损失的低复杂度消息传递算法（MPA）检测的方法和装置实施例。 一种方法包括：使用多个第一MPA计算，根据用于一个或多个用户设备（UE）的多个接收到的多路复用信号，在检测器处计算多个功能节点（FN），所述第一MPA计算映射多个变量 将与UE对应的节点（VN）与FN相对应，并且对于每个VN使用概率初始向量中的先验信息，从第一MPA计算中排除多个第一相对较小的乘法项，更新VN的概率，使用 最后计算的FN和多个第二MPA计算，其将FN映射到VN，并且从第二MPA计算中排除多个第二相对较小的乘法项。

    APPARATUS AND METHOD FOR NON-ORTHOGONAL TRANSMISSIONS
    16.
    发明申请
    APPARATUS AND METHOD FOR NON-ORTHOGONAL TRANSMISSIONS 审中-公开

    公开(公告)号：US20180123636A1

    公开(公告)日：2018-05-03

    申请号：US15858756

    申请日：2017-12-29

    申请人： HUAWEI TECHNOLOGIES CO., LTD.

    发明人： Anahid Robert SAFAVI ,  Alberto Giuseppe PEROTTI ,  Branislav M. POPOVIC

    IPC分类号： H04B1/707 ,  H04J13/00

    CPC分类号： H04B1/707 ,  H04J13/0007

    摘要： A transmitter apparatus in a wireless communication system that includes a processor. In one embodiment, the processor is configured to receive at least one modulated data message and spread the at least one modulated data message into a transmission signal using a low density signature matrix. The low density signature matrix is a cycle-free signature matrix. A receiver apparatus is configured to receive the transmission signal and detect within the received transmission signal at least one modulated data message. The processor is configured to detect the at least one modulated data message in one iteration using the cycle-free signature matrix.

    Physically secure digital signal processing for wireless M2M networks
    17.
    发明授权
    Physically secure digital signal processing for wireless M2M networks 有权

    公开(公告)号：US09648444B2

    公开(公告)日：2017-05-09

    申请号：US13999040

    申请日：2014-01-06

    申请人： Brian G. Agee

    发明人： Brian G. Agee

    IPC分类号： H04B1/00 ,  H04W4/00 ,  H04B1/715

    CPC分类号： H04W4/70 ,  H04B1/692 ,  H04B1/7103 ,  H04B1/7156 ,  H04B2001/7154 ,  H04J13/0007

    摘要： A method and apparatus for physically secure communication over machine-to-machine (M2M) networks is claimed, through the use of frequency-hop and random access spread spectrum modulation formats employing using truly random spreading codes and time/frequency hopping and receiver selection strategies at the transmitters in the M2M network, blind signal detection and linear signal separation techniques at the receivers in the M2M network, completely eliminating the ability for an adversary to predict and override M2M transmissions. Additional physical security protocols are also introduced that allow the network to easily detect and identify spoofing transmissions on uplinks and downlinks, and to automatically excise those transmissions as part of the despreading procedure, even if those transmissions are received at a much higher power level than the intended transmissions. Extensions to weakly and strongly macrodiverse networks are also described, which provide additional efficiency and security improvements by exploiting the route diversity of the network.

    Low complexity receiver and method for low density signature modulation
    18.
    发明授权
    Low complexity receiver and method for low density signature modulation 有权

    公开(公告)号：US09614576B2

    公开(公告)日：2017-04-04

    申请号：US14212583

    申请日：2014-03-14

    申请人： Huawei Technologies Co., Ltd.

    发明人： Hosein Nikopour ,  Alireza Bayesteh ,  Mohammadhadi Baligh

    IPC分类号： H04B1/707 ,  H04J13/00

    CPC分类号： H04B1/707 ,  H04J13/0007

    摘要： Method and apparatus embodiments are provided for low complexity message passing algorithm (MPA) detection with substantially minor or tolerated performance loss compared to the standard MPA. A method includes calculating, at a detector, a plurality of function nodes (FNs) according to a plurality of received multiplexing signals for a one or a plurality of user equipments (UEs) using a plurality of first MPA computations that map a plurality of variable nodes (VNs) corresponding to the UEs to the FNs and using a priori information in an initial vector of probabilities for each of the VNs, excluding from the first MPA computations a plurality of first relatively small multiplication terms, updating the probabilities for the VNs using the last calculated FNs and a plurality of second MPA computations that map the FNs to the VNs, and excluding a plurality of second relatively small multiplication terms from the second MPA calculations.

    PHYSICALLY SECURE DIGITAL SIGNAL PROCESSING FOR BLIND DIFFERENTIALLY-SPREAD WIRELESS M2M NETWORKS
    19.
    发明申请
    PHYSICALLY SECURE DIGITAL SIGNAL PROCESSING FOR BLIND DIFFERENTIALLY-SPREAD WIRELESS M2M NETWORKS 审中-公开
    用于盲点差分无线M2M网络的物理安全数字信号处理

    公开(公告)号：US20160365892A1

    公开(公告)日：2016-12-15

    申请号：US15246121

    申请日：2016-08-24

    申请人： Brian G. Agee

    发明人： Brian G. Agee

    IPC分类号： H04B1/7156 ,  H04B1/7103 ,  H04W4/00

    CPC分类号： H04B1/7156 ,  H04B1/692 ,  H04B1/7103 ,  H04B2001/7154 ,  H04J13/0007 ,  H04W4/70

    摘要： A method and apparatus for physically secure communication over machine-to-machine (M2M) networks is claimed, through the use of frequency-hop and random access spread spectrum modulation formats employing using truly random spreading codes and time/frequency hopping and receiver selection strategies at the transmitters in the M2M network, blind signal detection and linear signal separation techniques at the receivers in the M2M network, completely eliminating the ability for an adversary to predict and override M2M transmissions. Additional physical security protocols are also introduced that allow the network to easily detect and identify spoofing transmissions on uplinks and downlinks, and to automatically excise those transmissions as part of the despreading procedure, even if those transmissions are received at a much higher power level than the intended transmissions. Extensions to weakly and strongly macrodiverse networks are also described, which provide additional efficiency and security improvements by exploiting the route diversity of the network.

    摘要翻译： 通过使用使用真正随机扩展码和时间/跳频和接收机选择策略的频率跳跃和随机接入扩展频谱调制格式来要求保护通过机器对机器（M2M）网络进行物理上安全通信的方法和装置 在M2M网络的发射机上，在M2M网络的接收机处的盲信号检测和线性信号分离技术，完全消除了对手预测和覆盖M2M传输的能力。 还引入了额外的物理安全协议，其允许网络容易地检测和识别上行链路和下行链路上的欺骗传输，并且作为解扩过程的一部分自动地消除这些传输，即使这些传输在比 预期传输。 还描述了对弱和强大型宏观多样性网络的扩展，其通过利用网络的路由多样性来提供额外的效率和安全性改进。

    Spreading sequences with dual low correlation windows for quasi-synchronous code-division multiple-access communications
    20.
    发明授权
    Spreading sequences with dual low correlation windows for quasi-synchronous code-division multiple-access communications 有权
    扩展序列具有用于准同步码分多址通信的双低相关窗口

    公开(公告)号：US08306092B2

    公开(公告)日：2012-11-06

    申请号：US12370009

    申请日：2009-02-12

    申请人： Wei Hsiang Wu ,  Ho Yin Chan ,  Wai Ho Mow

    发明人： Wei Hsiang Wu ,  Ho Yin Chan ,  Wai Ho Mow

    IPC分类号： H04B1/00

    CPC分类号： H04J13/0007 ,  H04B1/7163 ,  H04J13/10

    摘要： Sequence generation in wireless communication is provided for sequences having good aperiodic correlation properties. In particular, dual window quasi-Barker sequences are generated that possess at least some properties of Barker sequences. In addition, the sequences can be orthogonal to mitigate multiple access interference. Dual windowing allows the sequences even after being phase modulated by data to be recognized, provided that delay in transmission is large as compared to the correlation zone. In this regard, the sequences can be utilized in quasi-synchronous spread spectrum and/or code division multiple access (CDMA) signal communication to provide orthogonality while substantially eliminating inter-user and inter-symbol interference. In addition, unlike the single window low periodic correlation sequences, system overheads, such as cyclic prefix, need not be utilized in transmission as the data modulation effect can be accounted for by the dual windowing.

    摘要翻译： 为具有良好的非周期相关特性的序列提供无线通信中的序列生成。 特别地，生成具有Barker序列的至少一些性质的双窗口准巴克序列。 此外，序列可以是正交的，以减轻多址接入干扰。 即使在数据被相位调制之后，双窗口也允许序列被识别，只要传输延迟比相关区域大。 在这方面，这些序列可以用于准同步扩频和/或码分多址（CDMA）信号通信以提供正交性，同时基本上消除了用户间和符号间干扰。 另外，与单窗口低周期相关序列不同，系统开销（例如循环前缀）不需要在传输中使用，因为数据调制效应可以通过双窗口来解决。