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公开(公告)号：US10321450B2
公开(公告)日：2019-06-11
申请号：US15534424
申请日：2015-12-09
发明人： David Victor Lawrie Haley , William George Cowley , John Lawrence Buetefuer , Alexander James Grant , Gottfried Lechner , Andre Pollok , Robert George McKilliam , Ingmar Rudiger Land , Marc Pierre Denis Lavenant , Ying Chen
摘要： Methods and apparatus for communication between terminals and an access node in a multiuser multicarrier communications network are described. The access node may be a satellite access node. Terminals are configured to perform initial estimation and tracking of channel offsets and to estimate channel offsets for future packets to be transmitted by the terminal. In some embodiments the channel offsets comprise mobility related channel offsets due to the relative movement between the access node and the plurality of terminals. Transmissions from the terminals to the access node are pre-compensated for the channel offsets, so that the aggregate signal received by the access node occupies a bandwidth greater or equal to the maximum signal bandwidth of any individual terminal. Terminal transmissions may overlap in frequency and time on the ground, but arrive orthogonally at the access node.
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公开(公告)号：US20180227042A1
公开(公告)日：2018-08-09
申请号：US15877246
申请日：2018-01-22
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
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.
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公开(公告)号：US20160204852A1
公开(公告)日：2016-07-14
申请号：US14913339
申请日：2014-08-21
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
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。
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公开(公告)号：US20150256247A1
公开(公告)日：2015-09-10
申请号：US14430096
申请日：2013-09-20
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。
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公开(公告)号：US10594425B2
公开(公告)日：2020-03-17
申请号：US15497188
申请日：2017-04-25
发明人： Alexander James Grant , David Victor Lawrie Haley , Robert George McKilliam , William George Cowley , Ho Leung Chan
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.
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公开(公告)号：US20170230130A1
公开(公告)日：2017-08-10
申请号：US15497188
申请日：2017-04-25
发明人： Alexander James Grant , David Victor Lawrie Haley , Robert George McKilliam , William George Cowley , Ho Leung Chan
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.
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公开(公告)号：US09548877B2
公开(公告)日：2017-01-17
申请号：US14654513
申请日：2013-12-20
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。
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公开(公告)号：US09362935B2
公开(公告)日：2016-06-07
申请号：US14421534
申请日：2013-08-13
发明人： Ying Chen , Andre Pollok , David Victor Lawrie Haley , Linda Mary Davis , Mark Damian McDonnell
CPC分类号： H03M1/0854 , H03M1/188 , H03M1/361
摘要： Parallel analog to digital converted (ADC) architectures that can be used to replace single path ADC architectures. The parallel ADC architecture can comprise N branches and one ADC per branch. These ADCs can be identical. However each branch can have a different path adjustments applied to the ADC. The path adjustments can be biases and/or gains and each ADC receives a different combination of biases and/or gain to generate multiple adjusted input signals. These are then combined to generate a quantized output signal. Using these parallel architectures a range of weighting and offset combining schemes can be employed to achieve improvements in signal to noise ratio and to reduce the impact of clipping as compared to a single path ADC architecture.
摘要翻译： 并行模数转换（ADC）架构，可用于替代单路ADC架构。 并行ADC架构可以包括每个分支的N个分支和一个ADC。 这些ADC可以相同。 然而，每个分支可以具有应用于ADC的不同路径调整。 路径调整可以是偏置和/或增益，并且每个ADC接收偏差和/或增益的不同组合以产生多个经调整的输入信号。 然后将它们组合以产生量化的输出信号。 使用这些并行架构，可以采用一系列加权和偏移组合方案来实现信噪比的提高，并减少与单路ADC结构相比的限幅的影响。
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公开(公告)号：US20160277145A1
公开(公告)日：2016-09-22
申请号：US14913775
申请日：2014-08-22
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。
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公开(公告)号：US20150230175A1
公开(公告)日：2015-08-13
申请号：US14430100
申请日：2013-09-20
发明人： Alexander James Grant , David Victor Lawrie Haley , Robert George McKilliam , William George Cowley , Ho Leung Chan
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。
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