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    Carrier phase and amplitude estimation for phase shift keying using pilots and data
    1.
    发明授权
    Carrier phase and amplitude estimation for phase shift keying using pilots and data 有权
    使用导频和数据进行相移键控的载波相位和幅度估计

    公开(公告)号：US09491018B2

    公开(公告)日：2016-11-08

    申请号：US14651941

    申请日：2013-12-13

    申请人： UNIVERSITY OF SOUTH AUSTRALIA

    发明人： William George Cowley ,  Robert George McKilliam ,  Andre Polok

    IPC分类号： H03D3/22 ,  H04L27/22 ,  H04L27/227 ,  H04L5/00 ,  H04L27/38 ,  H04L27/233 ,  H04L27/18 ,  H04L25/03

    CPC分类号： H04L27/2271 ,  H04L5/006 ,  H04L27/18 ,  H04L27/2275 ,  H04L27/2332 ,  H04L27/38 ,  H04L2025/03401 ,  H04L2025/03649

    摘要： A least squares estimator of carrier phase and amplitude in a receiver in a communication system using a phase shift keying modulation scheme that uses both known pilot symbols and unknown data symbols is described. That is, the method exploits knowledge of pilot symbols in addition to the unknown data symbols to estimate carrier phase and amplitude. Further, an efficient recursion based estimation method is described that only requires O(L. log L) arithmetic operations where L is the number of received signals. This method uses the M-Ary rounded phase offsets to sort the data symbols and this sorted order is used to recursively calculate candidate values in an optimization process. Simulation results show that the estimation methods Using data and pilot symbols outperform estimation methods using only data symbols (ie non-coherent detection methods). Further, the system can be used for systems using multiple M-ary phase shift keying digital modulation schemes.

    摘要翻译： 描述使用使用已知导频符号和未知数据符号的相移键控调制方案的通信系统中的接收机中的载波相位和幅度的最小二乘估计器。 也就是说，除了未知数据符号之外，该方法利用导频符号的知识来估计载波相位和幅度。 此外，描述了仅需要O（L·log L）算术运算的有效的基于递归的估计方法，其中L是接收信号的数量。 该方法使用M-Ary舍入相位偏移对数据符号进行排序，并且该排序顺序用于在优化过程中递归计算候选值。 仿真结果表明，使用数据和导频符号的估计方法优于仅使用数据符号的估计方法（即非相干检测方法）。 此外，该系统可以用于使用多个M相移键控数字调制方案的系统。

    MULTI-ACCESS COMMUNICATION SYSTEM
    2.
    发明申请
    MULTI-ACCESS COMMUNICATION SYSTEM 有权
    多访问通信系统

    公开(公告)号：US20150230175A1

    公开(公告)日：2015-08-13

    申请号：US14430100

    申请日：2013-09-20

    申请人： UNIVERSITY OF SOUTH AUSTRALIA

    发明人： Alexander James Grant ,  David Victor Lawrie Haley ,  Robert George McKilliam ,  William George Cowley ,  Ho Leung Chan

    IPC分类号： H04W52/02 ,  H04W72/04 ,  H04J11/00 ,  H04L5/00

    CPC分类号： H04W52/0216 ,  H04B7/212 ,  H04J11/0036 ,  H04L5/0055 ,  H04W52/0229 ,  H04W52/0241 ,  H04W52/028 ,  H04W72/0446 ,  Y02D70/164 ,  Y02D70/446

    摘要： A multiple access slotted wireless communication system comprising a plurality of terminals and a multi-access receiver is described. The multi-access receiver can decode multiple transmissions in each slot of a frame from terminals in its field of view. Each terminal has an active state for transmitting and an inactive state. After receiving acknowledgement of a successful transmission by the terminal, the terminal enters the inactive state for at least a transmission delay time. This may be the remaining time that the terminal is in the field of view of the multi-access receiver. This may be achieved by the terminal using a probability of transmission to determine whether or not to transmit in the next frame. The terminal may also be configured to select the slot in a frame, and this may be based upon information such as which slots were acknowledged. The receiver may use compression to transmit acknowledgement messages.

    摘要翻译： 描述了包括多个终端和多接入接收机的多址时隙无线通信系统。 多接入接收机可以从其视野中的终端解码帧的每个时隙中的多个传输。 每个终端具有用于发送和非活动状态的活动状态。 在终端接收到成功发送的确认之后，终端进入至少一个传输延迟时间的无效状态。 这可能是终端在多接入接收机的视野中的剩余时间。 这可以由终端使用发送概率来确定是否在下一帧中进行发送。 终端还可以被配置为在帧中选择时隙，并且这可以基于诸如哪些时隙被确认的信息。 接收机可以使用压缩来发送确认消息。

    Multi-access communication system
    3.
    发明授权
    Multi-access communication system 有权

    公开(公告)号：US10594425B2

    公开(公告)日：2020-03-17

    申请号：US15497188

    申请日：2017-04-25

    申请人： University of South Australia

    发明人： Alexander James Grant ,  David Victor Lawrie Haley ,  Robert George McKilliam ,  William George Cowley ,  Ho Leung Chan

    IPC分类号： H04J11/00 ,  H04W52/02 ,  H04B7/212 ,  H04L5/00 ,  H04W72/04 ,  G08C17/02 ,  H04B7/204 ,  H04J1/00

    摘要： A multiple access slotted wireless communication system comprising a plurality of terminals and a multi-access receiver is described. The multi-access receiver can decode multiple transmissions in each slot of a frame from terminals in its field of view. Each terminal has an active state for transmitting and an inactive state. After receiving acknowledgement of a successful transmission by the terminal, the terminal enters the inactive state for at least a transmission delay time. This may be the remaining time that the terminal is in the field of view of the multi-access receiver. This may be achieved by the terminal using a probability of transmission to determine whether or not to transmit in the next frame. The terminal may also be configured to select the slot in a frame, and this may be based upon information such as which slots were acknowledged. The receiver may use compression to transmit acknowledgement messages.

    MULTI-ACCESS COMMUNICATION SYSTEM
    4.
    发明申请
    MULTI-ACCESS COMMUNICATION SYSTEM 审中-公开

    公开(公告)号：US20170230130A1

    公开(公告)日：2017-08-10

    申请号：US15497188

    申请日：2017-04-25

    申请人： University of South Australia

    发明人： Alexander James Grant ,  David Victor Lawrie Haley ,  Robert George McKilliam ,  William George Cowley ,  Ho Leung Chan

    IPC分类号： H04J11/00 ,  H04W72/04 ,  H04B7/212 ,  H04L5/00 ,  H04W52/02

    摘要： A multiple access slotted wireless communication system comprising a plurality of terminals and a multi-access receiver is described. The multi-access receiver can decode multiple transmissions in each slot of a frame from terminals in its field of view. Each terminal has an active state for transmitting and an inactive state. After receiving acknowledgement of a successful transmission by the terminal, the terminal enters the inactive state for at least a transmission delay time. This may be the remaining time that the terminal is in the field of view of the multi-access receiver. This may be achieved by the terminal using a probability of transmission to determine whether or not to transmit in the next frame. The terminal may also be configured to select the slot in a frame, and this may be based upon information such as which slots were acknowledged. The receiver may use compression to transmit acknowledgement messages.

    A Multiuser Communications System
    8.
    发明申请
    A Multiuser Communications System 审中-公开
    多用户通信系统

    公开(公告)号：US20160204852A1

    公开(公告)日：2016-07-14

    申请号：US14913339

    申请日：2014-08-21

    申请人： UNIVERSITY OF SOUTH AUSTRALIA

    发明人： Alexander James Grant ,  Gottfried Lechner ,  Andre Pollok ,  Robert George McKilliam ,  Ingmar Rudiger Land ,  David Victor Lawrie Haley ,  William George Cowley ,  Linda Mary Davis ,  Sorin Adrian Barbulescu ,  John Lawrence Buetefuer ,  Marc Pierre Denis Lavenant

    IPC分类号： H04B7/185 ,  H04W72/04 ,  H04W72/08

    CPC分类号： H04B7/18539 ,  H04B1/7107 ,  H04W72/0446 ,  H04W72/082 ,  H04W88/02

    摘要： A multiuser communication system comprises multiple transmitters and a multiuser receiver that detects multiple transmissions via iterative soft interference cancellation. An initial acquisition module and single user decoder module are also described. The multiuser receiver acquires and subtracts known users in the residual signal before acquiring new users in the residual signal, which is performed iteratively until no new users are detected or a stopping criterion is met. To aid receiver acquisition, the transmitters insert discrete tones into the transmitted signals. These allow the multiuser receiver to obtain initial estimates of the frequency, time, gain, and/or phase offset for each user. To improve the quality of cancellation the receiver refines estimates of gain, time, frequency and phase offsets for each user after each iteration, and calculates time varying SINR estimates for each user. The multiuser receiver may be satellite based, may be a distributed receiver, or process users in parallel.

    摘要翻译： 多用户通信系统包括多个发射机和通过迭代软干扰消除来检测多个传输的多用户接收机。 还描述了初始采集模块和单用户解码器模块。 多用户接收机在获取剩余信号中的新用户之前，对残留信号中的已知用户进行迭代，获取并减去已知用户，直到不检测到新的用户或满足停止标准为止。 为了帮助接收机采集，发射机将离散音调插入发射信号。 这些允许多用户接收机获得每个用户的频率，时间，增益和/或相位偏移的初始估计。 为了提高取消的质量，接收机在每次迭代之后对每个用户的增益，时间，频率和相位偏移的估计进行精细化，并计算每个用户的时变SINR估计。 多用户接收机可以是基于卫星的，可以是分布式接收机，或并行处理用户。

    COMMUNICATION SYSTEM AND METHOD
    9.
    发明申请
    COMMUNICATION SYSTEM AND METHOD 有权
    通信系统和方法

    公开(公告)号：US20150256247A1

    公开(公告)日：2015-09-10

    申请号：US14430096

    申请日：2013-09-20

    申请人： UNIVERSITY OF SOUTH AUSTRALIA

    发明人： David Victor Lawrie Haley ,  John Lawrence Buetefuer ,  Alexander James Grant ,  William George Cowley ,  Gottfried Lechner ,  Ingmar Rudiger Land ,  Robert George McKilliam ,  Andre Pollok ,  Linda Mary Davis ,  Ricky Rocco Luppino ,  Sorin Adrian Barbulescu

    IPC分类号： H04B7/185

    CPC分类号： H04B7/18513 ,  H04B7/185 ,  H04B7/212 ,  H04W40/20 ,  Y02D70/00 ,  Y02D70/164 ,  Y02D70/38 ,  Y02D70/446

    摘要： A communication system is disclosed. In an embodiment, the communication system includes a user node for receiving data from a remote application program, the data including message data for communication to a central application program operatively associated with the remote application program; plurality of geographically distributed gateway nodes; one or more access nodes for receiving the message data from the user node via a first communications interface, and communicating the message data via a second communications interface to one or more of the plurality of geographically distributed gateway nodes; and a hub for communicating with the one or more of the plurality of geographically distributed gateway nodes to receive the message data for communication to the central application.

    摘要翻译： 公开了通信系统。 在一个实施例中，通信系统包括用于从远程应用程序接收数据的用户节点，该数据包括用于与可操作地与远程应用程序相关联的中央应用程序通信的消息数据; 多个地理分布式网关节点; 一个或多个接入节点，用于经由第一通信接口从所述用户节点接收所述消息数据，以及经由第二通信接口将所述消息数据传送到所述多个地理分布的网关节点中的一个或多个; 以及用于与所述多个地理分布的网关节点中的一个或多个通信的中枢，以接收用于与中央应用通信的消息数据。