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公开(公告)号：EP2898609A4
公开(公告)日：2016-05-25
申请号：EP13839467
申请日：2013-09-20
申请人： UNIV SOUTH AUSTRALIA
发明人： GRANT ALEXANDER JAMES , HALEY DAVID VICTOR LAWRIE , MCKILLIAM ROBERT GEORGE , COWLEY WILLIAM GEORGE , CHAN HO LEUNG
CPC分类号： H04W52/0216 , H04B7/212 , H04J11/0036 , H04L5/0055 , H04W52/0229 , H04W52/0241 , H04W52/028 , H04W72/0446 , Y02D70/00 , 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。 多址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。 在接收到终端成功发送的确认之后，终端进入至少一个传输延迟时间的非活动状态。 这可能是终端在多址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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2.发明公开
公开(公告)号：EP3036835A4
公开(公告)日：2017-08-30
申请号：EP14838624
申请日：2014-08-22
申请人： UNIV SOUTH AUSTRALIA
发明人： GRANT ALEXANDER JAMES , LECHNER GOTTFRIED , POLLOK ANDRE , MCKILLIAM ROBERT GEORGE , LAND INGMAR RUDIGER , HALEY DAVID VICTOR LAWRIE , LAVENANT MARC PIERRE DENIS
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： 本发明涉及用于使用例如现有的自动识别系统（AIS）的游程长度受限（RLL）消息来改善通信系统的性能的方法和装置。 二进制数据序列是前向纠错（FEC）编码，然后例如通过位擦除来补偿序列，使得不需要位填充，或者位填充器将不被激活以确保编码序列 符合RLL要求。 描述了各种实施例以处理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或者将位选择性地添加到保留缓冲区以补偿后面的位填充。 额外的RLL训练序列也可以被添加来协助接收器获取。
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公开(公告)号：EP1499996A4
公开(公告)日：2006-11-15
申请号：EP03747365
申请日：2003-04-29
申请人： UNIV SOUTH AUSTRALIA
CPC分类号： H04L25/03171 , H04B1/7105
摘要： The invention is an iterative signal processing arrangement having one or more pairs of first and second signal processing components. These pairs are in iterative configuration with each of the first signal processing components having as its input one or more received signals dependent upon one or more transmitted signals. For each said signal processing component pair the output of said first signal processing component is an estimate of a characteristic of a selected transmitted signal based on the current and one or more previous input signals received by said first signal processing component. This estimate is input to said corresponding second signal processing component which provides a further estimate of said selected transmitted signal. The outputs of all said second components of respective pairs are input to their corresponding first components in a succeeding iteration cycle.
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公开(公告)号：EP3036837A4
公开(公告)日：2017-04-12
申请号：EP14838564
申请日：2014-08-21
申请人： UNIV SOUTH AUSTRALIA
发明人： GRANT ALEXANDER JAMES , LECHNER GOTTFRIED , POLLOK ANDRE , MCKILLIAM ROBERT GEORGE , LAND INGMAR RUDIGER , HALEY DAVID VICTOR LAWRIE , COWLEY WILLIAM GEORGE , DAVIS LINDA MARY , BARBULESCU SORIN ADRIAN , BUETEFUER JOHN LAWRENCE , LAVENANT MARC PIERRE DENIS
IPC分类号： H04B1/10 , H04B1/7107
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。 多用户接收器在获取剩余信号中的新用户之前获取并减去残留信号中的已知用户，该剩余信号被迭代地执行，直到没有新的用户被检测到或停止标准被满足为止。 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：EP2936689A4
公开(公告)日：2016-10-19
申请号：EP13865233
申请日：2013-12-20
申请人： UNIV SOUTH AUSTRALIA
IPC分类号： H03M13/29 , H03D9/04 , H03M13/00 , H03M13/11 , H03M13/37 , H03M13/39 , H04B1/30 , H04B10/516 , H04J13/00 , H04L1/00 , H04L27/10 , H04L27/12 , H04L27/14 , H04L27/18 , H04L27/20
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：EP2898728A4
公开(公告)日：2016-06-08
申请号：EP13838792
申请日：2013-09-20
申请人： UNIV SOUTH AUSTRALIA
发明人： HALEY DAVID VICTOR LAWRIE , BUETEFUER JOHN LAWRENCE , GRANT ALEXANDER JAMES , COWLEY WILLIAM GEORGE , LECHNER GOTTFRIED , LAND INGMAR RUDIGER , MCKILLIAM ROBERT GEORGE , POLLOK ANDRE , DAVIS LINDA MARY , LUPPINO RICKY ROCCO , BARBULESCU SORIN ADRIAN
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 for sending small data message is disclosed in which a user node receives data from a remote application program which is sent as a message to a central application program executing on a central hub. The user nodes sends the message to an access node using a first radio interface and the access nodes forward the message to a gateway node which relays the message to the hub over a second radio interface. The system also includes composite nodes which either implement access node and gateway node functionality, or switch operational modes between access nodes and gateway node functions. The mode switching can be triggered based on proximity to access nodes, or by instructions from a hub. The gateway nodes can implement a message storage function, and can be implemented as software defined radios.
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，所述数据包括用于与可操作地与所述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用户节点接收消息数据，以及经由第二通信接口将消息数据传送到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：EP2885884A4
公开(公告)日：2016-03-30
申请号：EP13829601
申请日：2013-08-14
申请人： UNIV SOUTH AUSTRALIA
发明人： GRANT ALEXANDER JAMES , HALEY DAVID VICTOR LAWRIE , MCKILLIAM ROBERT GEORGE , COWLEY WILLIAM GEORGE , DAVIS LINDA MARY
CPC分类号： H04W72/048 , H04B7/18539 , H04B7/2121 , H04W48/04 , H04W64/00 , H04W72/04 , H04W72/0446 , H04W84/18
摘要： Methods and systems are described which provide solutions for determining how to allocate terminals to slots in order to maximize communication system performance in the case where there is no feedback channel between a multiuser satellite receiver and terminals within the field of view. Terminals operate independently of each other and choose transmission slots based upon the geographic position of the terminal. Terminals can be programmed with a slot selector to choose slots according to some deterministic or non deterministic function of the current position. A slot plan database may be used to assist in efficient slot selection. Regular and irregular grid based allocation methods are described, that reduce the likelihood that too many terminals transmit using the same slot within the field of view. Satellite induced Doppler effects can be utilized be further increase slot re-use and to improve allocation of slots so that the receiver sees an approximately uniform distribution of frequencies over the frequency band to improve system throughput. The approaches described herein greatly reduce or eliminate the probability of failure at the receiver, which has numerous implementation advantages such as reduced cost, complexity, and power consumption.
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