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    Channel structures for a quasi-orthogonal multiple-access communication system
    21.
    发明授权
    Channel structures for a quasi-orthogonal multiple-access communication system 有权
    准正交多址通信系统的信道结构

    公开(公告)号：US08446892B2

    公开(公告)日：2013-05-21

    申请号：US11129140

    申请日：2005-05-13

    申请人： Tingfang Ji ,  Ayman Naguib ,  Arak Sutivong ,  Dhananjay Ashok Gore ,  Alexei Gorokhov

    发明人： Tingfang Ji ,  Ayman Naguib ,  Arak Sutivong ,  Dhananjay Ashok Gore ,  Alexei Gorokhov

    IPC分类号： H04W4/00 ,  H04W72/00 ,  H04B7/216 ,  H04B7/208 ,  H04B1/00 ,  H04J1/00

    CPC分类号： H04J11/005 ,  H04B1/7143

    摘要： A channel structure has at least two channel sets. Each channel set contains multiple channels and is associated with a specific mapping of the channels to the system resources available for data transmission. Each channel set may be defined based on a channel tree having a hierarchical structure. To achieve intra-cell interference diversity, the channel-to-resource mapping for each channel set is pseudo-random with respect to the mapping for each remaining channel set. In each scheduling interval, terminals are scheduled for transmission on the forward and/or reverse link. The scheduled terminals are assigned channels from the channel sets. Multiple terminals may use the same system resources and their overlapping transmissions may be separated in the spatial domain. For example, beamforming may be performed to send multiple overlapping transmissions on the forward link, and receiver spatial processing may be performed to separate out multiple overlapping transmissions received on the reverse link.

    摘要翻译： 通道结构具有至少两个通道组。 每个信道集合包含多个信道，并且将信道的特定映射与可用于数据传输的系统资源相关联。 可以基于具有分层结构的信道树来定义每个信道集合。 为了实现小区内干扰分集，每个信道集合的信道到资源映射相对于每个剩余信道集合的映射是伪随机的。 在每个调度间隔中，终端被调度为在前向链路和/或反向链路上传输。 调度终端从通道集分配通道。 多个终端可以使用相同的系统资源，并且它们的重叠传输可以在空间域中分离。 例如，可以执行波束成形以在前向链路上发送多个重叠传输，并且可以执行接收机空间处理以分离在反向链路上接收的多个重叠传输。

    Robust erasure detection and erasure-rate-based closed loop power control
    29.
    发明授权
    Robust erasure detection and erasure-rate-based closed loop power control 有权
    强大的擦除检测和基于擦除率的闭环功率控制

    公开(公告)号：US07197692B2

    公开(公告)日：2007-03-27

    申请号：US10890717

    申请日：2004-07-13

    申请人： Arak Sutivong ,  Avneesh Agrawal ,  David Jonathan Julian

    发明人： Arak Sutivong ,  Avneesh Agrawal ,  David Jonathan Julian

    IPC分类号： H03M13/03

    CPC分类号： H04L1/0045 ,  H04L1/0057 ,  H04L1/20 ,  H04W52/125 ,  H04W52/20

    摘要： Techniques for performing erasure detection and power control for a transmission without error detection coding are described. For erasure detection, a transmitter transmits codewords via a wireless channel. A receiver computes a metric for each received codeword, compares the computed metric against an erasure threshold, and declares the received codeword to be “erased” or “non-erased”. The receiver dynamically adjusts the erasure threshold based on received known codewords to achieve a target level of performance. For power control, an inner loop adjusts the transmit power to maintain a received signal quality (SNR) at a target SNR. An outer loop adjusts the target SNR based on the status of received codewords (erased or non-erased) to achieve a target erasure rate. A third loop adjusts the erasure threshold based on the status of received known codewords (“good”, “bad”, or erased) to achieve a target conditional error rate.

    摘要翻译： 描述了用于对没有错误检测编码的传输进行擦除检测和功率控制的技术。 为了擦除检测，发射机经由无线信道发送码字。 接收机计算每个接收到的码字的度量，将所计算的度量与擦除阈值进行比较，并将接收的码字声明为“擦除”或“未擦除”。 接收机基于接收到的已知码字来动态地调整擦除阈值，以实现目标性能水平。 对于功率控制，内部环路调整发射功率以将接收信号质量（SNR）保持在目标SNR。 外部环路基于接收到的码字（擦除或未擦除）的状态来调整目标SNR以实现目标擦除率。 第三循环基于接收的已知码字的状态（“好”，“坏”或被擦除）来调整擦除阈值，以实现目标条件错误率。

    Method, apparatus, and system for user-multiplexing in multiple access systems with retransmission
    30.
    发明授权
    Method, apparatus, and system for user-multiplexing in multiple access systems with retransmission 有权
    用于在具有重传的多个接入系统中进行用户复用的方法，装置和系统

    公开(公告)号：US07181666B2

    公开(公告)日：2007-02-20

    申请号：US10426546

    申请日：2003-04-29

    申请人： Matt Grob ,  Avneesh Agrawal ,  Arak Sutivong

    发明人： Matt Grob ,  Avneesh Agrawal ,  Arak Sutivong

    IPC分类号： G08C25/02 ,  G08C25/04

    CPC分类号： H04B7/2656 ,  H04L1/1887 ,  H04L2001/0096

    摘要： According to one aspect of the invention, a method is provided in which a group of users in a system that employs a retransmission mechanism such as Automatic Repeat Request (ARQ) is divided into multiple sub-groups of users. Each user is assigned a number of channels for transmission of information. The number of channels assigned to each user is determined based, at least in part, on the number of the sub-groups and a number of channels available in the system. Transmission intervals are alternated among the multiple sub-groups such that only one of the sub-groups of users is allowed to transmit information during any transmission interval. An idle interval during which a particular user in the first group does not transmit information is used as a waiting period for acknowledgement of a previous transmission by the particular user.

    摘要翻译： 根据本发明的一个方面，提供一种方法，其中使用诸如自动重传请求（ARQ）的重传机制的系统中的一组用户被划分为多个用户子组。 为每个用户分配了多个信道用于传输信息。 至少部分地基于子系统的数量和系统中可用的通道的数量来确定分配给每个用户的频道数量。 在多个子组之间交替发送间隔，使得只有一个用户子组被允许在任何发送间隔期间发送信息。 第一组中的特定用户不发送信息的空闲间隔被用作特定用户对先前发送的确认的等待时段。