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。

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

IPC分类号： H04W40/04 ,  H04B7/185 ,  H04B7/204 ,  H04B7/212 ,  H04W40/20

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。

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

IPC分类号： H04B7/185 ,  H04B7/212 ,  H04W48/04 ,  H04W84/18

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.