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    Enhanced Automatic identification System
    1.
    发明申请
    Enhanced Automatic identification System 审中-公开
    增强自动识别系统

    公开(公告)号：US20160277145A1

    公开(公告)日：2016-09-22

    申请号：US14913775

    申请日：2014-08-22

    申请人： UNIVERSITY OF SOUTH AUSTRALIA

    发明人： Alexander James Grant ,  Andre Pollok ,  Gottfried Lechner ,  David Victor Lawrie Haley ,  Robert George McKilliam ,  Ingmar Rudiger Land ,  Marc Pierre Denis Lavenant

    IPC分类号： H04L1/00

    CPC分类号： H04L1/0041 ,  H03M5/145 ,  H03M13/09 ,  H03M13/1102 ,  H03M13/23 ,  H03M13/2957 ,  H03M13/31 ,  H03M13/6325 ,  H03M13/6356 ,  H04L1/00 ,  H04L1/0045 ,  H04L1/0061 ,  H04L1/0071

    摘要： The invention relates to method and apparatus for improving the performance of communication systems using Run Length Limited (RLL) messages such as the existing Automatic Identification System (AIS). A binary data sequence is Forward Error Correction (FEC) coded and then the sequence is compensated, for example by bit-erasure, so that either bit-stuffing is not required, or a bit stuffer will not be activated to ensure that the coded sequence meets the RLL requirement. Various embodiments are described to handle different architectures or input points for the FEC encoder and bit erasure module. The bit erasure module may also add dummy bits to ensure a RLL compliant CRC or to selectively add bits to a reserve buffer to compensate for later bit stuffing in a header. Additional RLL training sequences may also be added to assist in, receiver acquisition.

    摘要翻译： 本发明涉及使用诸如现有自动识别系统（AIS）的运行长度限制（RLL）消息来改善通信系统性能的方法和装置。 二进制数据序列是前向纠错（FEC）编码的，然后例如通过比特擦除来补偿序列，使得不需要任何一个比特填充，或者一个填充填充器将不被激活以确保编码序列 符合RLL要求。 描述了各种实施例来处理用于FEC编码器和位擦除模块的不同架构或输入点。 位擦除模块还可以添加虚拟位以确保符合RLL的CRC或者选择性地将位添加到保留缓冲器以补偿在标题中稍后的位填充。 还可以添加额外的RLL训练序列以辅助接收器采集。

    Digital communication system
    2.
    发明授权
    Digital communication system 有权
    数字通讯系统

    公开(公告)号：US09548877B2

    公开(公告)日：2017-01-17

    申请号：US14654513

    申请日：2013-12-20

    申请人： University of South Australia

    发明人： Ingmar Rudiger Land ,  Gottfried Lechner ,  Alexander James Grant ,  David Victor Lawrie Haley

    IPC分类号： H04L27/20 ,  H04L27/18 ,  H04B10/516 ,  H03M13/00 ,  H03M13/29 ,  H03M13/37 ,  H03M13/11 ,  H04L1/00

    CPC分类号： H04L27/18 ,  H03M13/1157 ,  H03M13/1197 ,  H03M13/2909 ,  H03M13/2957 ,  H03M13/3784 ,  H03M13/616 ,  H03M13/6325 ,  H03M13/6331 ,  H04B10/516 ,  H04L1/0042 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0065 ,  H04L27/2003

    摘要： Methods and apparatus for use in communication systems using recursive modulation schemes with a Low Density Generator Matrix code (including an irregular repeat accumulate (IRA) code) are described that have reduced complexity and thus reduced cost compared to prior art systems. A communication system is described in which the transmitter concatenates a low density generator matrix code with an accumulator followed by a recursive modulator in order to eliminate the use of an interleaver, and in which the receiver combines the decoder for the accumulator and the soft demodulator into a single joint decoder in order reduce the number of components and complexity. Another variation is also described in which the transmitter is further simplified by eliminated the accumulator altogether, and in which the receiver is further simplified by replacing the joint decoder with a soft demodulator prior to the LDGM soft decoder.

    摘要翻译： 使用具有低密度发生器矩阵码（包括不规则重复累积（IRA）码）的递归调制方案的通信系统中使用的方法和装置被描述为与现有技术系统相比降低了复杂度并因此降低了成本。 描述了一种通信系统，其中发射机将低密度发生器矩阵码与累加器后跟递归调制器连接，以消除交织器的使用，并且其中接收机将用于累加器的解码器和软解调器组合成 单个联合解码器，以减少组件的数量和复杂性。 还描述了另一变型，其中通过一起消除累加器来进一步简化发射机，并且其中通过在LDGM软解码器之前用软解调器替换联合解码器来进一步简化接收机。

    Digital Communication System
    6.
    发明申请
    Digital Communication System 有权
    数字通信系统

    公开(公告)号：US20150333942A1

    公开(公告)日：2015-11-19

    申请号：US14654513

    申请日：2013-12-20

    申请人： UNIVERSITY OF SOUTH AUSTRALIA

    发明人： Ingmar Rudiger Land ,  Gottfried Lechner ,  Alexander James Grant ,  David Victor Haley

    IPC分类号： H04L27/18 ,  H03M13/37 ,  H03M13/00 ,  H03M13/29 ,  H04L27/20 ,  H04B10/516

    CPC分类号： H04L27/18 ,  H03M13/1157 ,  H03M13/1197 ,  H03M13/2909 ,  H03M13/2957 ,  H03M13/3784 ,  H03M13/616 ,  H03M13/6325 ,  H03M13/6331 ,  H04B10/516 ,  H04L1/0042 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0065 ,  H04L27/2003

    摘要： Methods and apparatus for use in communication systems using recursive modulation schemes with a Low Density Generator Matrix code (including an irregular repeat accumulate (IRA) code) are described that have reduced complexity and thus reduced cost compared to prior art systems. A communication system is described in which the transmitter concatenates a low density generator matrix code with an accumulator followed by a recursive modulator in order to eliminate the use of an interleaver, and in which the receiver combines the decoder for the accumulator and the soft demodulator into a single joint decoder in order reduce the number of components and complexity. Another variation is also described in which the transmitter is further simplified by eliminated the accumulator altogether, and in which the receiver is further simplified by replacing the joint decoder with a soft demodulator prior to the LDGM soft decoder.

    摘要翻译： 使用具有低密度发生器矩阵码（包括不规则重复累积（IRA）码）的递归调制方案的通信系统中使用的方法和装置被描述为与现有技术系统相比降低了复杂度并因此降低了成本。 描述了一种通信系统，其中发射机将低密度发生器矩阵码与累加器后跟递归调制器连接，以消除交织器的使用，并且其中接收机将用于累加器的解码器和软解调器组合成 单个联合解码器，以减少组件的数量和复杂性。 还描述了另一变型，其中通过一起消除累加器来进一步简化发射机，并且其中通过在LDGM软解码器之前用软解调器替换联合解码器来进一步简化接收机。

    A Multiuser Communications System
    9.
    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
    10.
    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。