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132 条记录 (耗时 0.024 秒)

    Method, apparatus, and system for user-multiplexing in multiple access systems with retransmission
    1.
    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。

    MC-CDMA MULTIPLEXING IN AN ORTHOGONAL UPLINK
    2.
    发明申请
    MC-CDMA MULTIPLEXING IN AN ORTHOGONAL UPLINK 有权

    公开(公告)号：US20110235685A1

    公开(公告)日：2011-09-29

    申请号：US13090220

    申请日：2011-04-19

    申请人： Arak Sutivong ,  Avneesh Agrawal

    发明人： Arak Sutivong ,  Avneesh Agrawal

    IPC分类号： H04B1/713

    CPC分类号： H04L5/0021 ,  H04B1/692 ,  H04B1/713 ,  H04J13/18

    摘要： Techniques are provided to support multi-carrier code division multiple access (MC-CDMA) in an orthogonal uplink of a wireless communication system. A method of wireless multi-carrier communications comprises dividing sub-carriers on an uplink into non-overlapping groups, allocating a time-frequency block including a hopping duration and a non-overlapped group, respectively, assigning a different set of orthogonal codes to each user, spreading data (or pilot) symbols of each user over the allocated time-frequency block, wherein the data (or pilot) symbols of each user are spread using the different set of orthogonal codes assigned to each user, mapping each data (or pilot) symbol to a modulation symbol in the time-frequency block, generating an orthogonal waveform based on the mapped symbols, and transmitting the orthogonal waveform.

    SYSTEMS AND METHODS THAT UTILIZE A CAPACITY-BASED SIGNAL-TO-NOISE RATIO TO PREDICT AND IMPROVE MOBILE COMMUNICATION
    3.
    发明申请
    SYSTEMS AND METHODS THAT UTILIZE A CAPACITY-BASED SIGNAL-TO-NOISE RATIO TO PREDICT AND IMPROVE MOBILE COMMUNICATION 审中-公开
    利用基于能力的信号与噪声比进行预测和改进移动通信的系统和方法

    公开(公告)号：US20100029265A1

    公开(公告)日：2010-02-04

    申请号：US12577659

    申请日：2009-10-12

    申请人： Aamod Khandekar ,  Avneesh Agrawal ,  Arak Sutivong ,  Edward Harrison Teague

    发明人： Aamod Khandekar ,  Avneesh Agrawal ,  Arak Sutivong ,  Edward Harrison Teague

    IPC分类号： H04W24/00

    CPC分类号： H04W52/241 ,  H04L1/0001 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/0066 ,  H04L1/20 ,  H04L1/206 ,  H04W52/24

    摘要： Techniques for utilizing a capacity-based effective signal-to-noise ratio (SNR) to improve wireless communication are described herein. In an embodiment, a mobile terminal can determine the effective SNR from a forward link channel using pilot/data symbols. The mobile terminal can convey the effective SNR to a base station. In order to minimize transmission overhead, the mobile terminal can quantize the effective SNR prior to transmitting it to the base station. In another embodiment, the base station can determine the effective SNR from a reverse link. The base station can utilize the effective SNR to facilitate scheduling transmissions from the mobile terminal, transmitting power control commands to the mobile terminal, and determining a supporting data rate for the mobile terminal, for example. Suitable SNRs include constrained, unconstrained, average, and/or approximated effective SNRs. In addition, various filters, such as an averaging filter, can be utilized to further process the effective SNR.

    摘要翻译： 这里描述了利用基于容量的有效信噪比（SNR）来改善无线通信的技术。 在一个实施例中，移动终端可以使用导频/数据符号从前向链路信道确定有效SNR。 移动终端可以将有效SNR传送给基站。 为了最小化传输开销，移动终端可以在将其发送到基站之前量化有效SNR。 在另一个实施例中，基站可以从反向链路确定有效SNR。 基站可以利用有效SNR来促进调度来自移动终端的传输，向移动终端发送功率控制命令，以及确定移动终端的支持数据速率。 合适的SNR包括约束的，无约束的，平均的和/或近似的有效SNR。 此外，可以使用诸如平均滤波器的各种滤波器来进一步处理有效SNR。

    REVERSE LINK POWER CONTROL IN AN ORTHOGONAL SYSTEM
    4.
    发明申请
    REVERSE LINK POWER CONTROL IN AN ORTHOGONAL SYSTEM 有权
    正交系统中的反向链路功率控制

    公开(公告)号：US20090274232A1

    公开(公告)日：2009-11-05

    申请号：US12504085

    申请日：2009-07-16

    申请人： Arak Sutivong ,  Avneesh Agrawal

    发明人： Arak Sutivong ,  Avneesh Agrawal

    IPC分类号： H04K1/10

    CPC分类号： H04W52/367 ,  H04W52/12 ,  H04W52/146 ,  H04W52/20 ,  H04W52/24 ,  H04W52/286 ,  H04W52/48

    摘要： A closed-loop reverse-link power control algorithm for a frequency hopping orthogonal frequency division multiple access (FH-OFDMA) system is described. The power control algorithm adjusts the user's transmit power based on effective carrier-to-interference (C/I) and Received-Power-Over-Thermal (RpOT) measurements. The algorithm is inherently stable and is effective for FH-OFDMA systems with retransmissions.

    摘要翻译： 描述了用于跳频正交频分多址（FH-OFDMA）系统的闭环反向链路功率控制算法。 功率控制算法基于有效的载波干扰（C / I）和接收功率过热（RpOT）测量来调整用户的发射功率。 该算法本质上是稳定的，对于具有重传的FH-OFDMA系统是有效的。

    POWER CONTROL FOR A WIRELESS COMMUNICATION SYSTEM UTILIZING ORTHOGONAL MULTIPLEXING
    6.
    发明申请
    POWER CONTROL FOR A WIRELESS COMMUNICATION SYSTEM UTILIZING ORTHOGONAL MULTIPLEXING 有权
    使用正交多路复用的无线通信系统的功率控制

    公开(公告)号：US20080214121A1

    公开(公告)日：2008-09-04

    申请号：US12121405

    申请日：2008-05-15

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

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

    IPC分类号： H04B17/00

    CPC分类号： H04W52/247 ,  H04B17/309 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/20 ,  H04W24/00 ,  H04W52/125 ,  H04W52/146 ,  H04W52/16 ,  H04W52/20 ,  H04W52/24 ,  H04W52/241 ,  H04W52/242 ,  H04W52/243 ,  H04W52/283 ,  H04W52/36 ,  H04W52/362 ,  H04W52/367 ,  H04W52/54 ,  H04W52/60 ,  H04W88/08

    摘要： Techniques for adjusting transmit power to mitigate both intra-sector interference to a serving base station and inter-sector interference to neighbor base stations are described. The amount of inter-sector interference that a terminal may cause may be roughly estimated based on the total interference observed by each neighbor base station, channel gains for the serving and neighbor base stations, and the current transmit power level. The transmit power may be decreased if high interference is observed by a neighbor base station and increased otherwise. The transmit power may be adjusted by a larger amount and/or more frequently if the terminal is located closer to the neighbor base station observing high interference and/or if the current transmit power level is higher, and vice versa. The intra-sector interference is maintained within an acceptable level by limiting a received SNR for the terminal to be within a range of allowable SNRs.

    摘要翻译： 描述了用于调整发射功率以减轻对服务基站的扇区内干扰和对邻近基站的扇区间干扰的技术。 终端可能引起的扇区间干扰的量可以基于每个相邻基站观测到的总干扰，服务和相邻基站的信道增益以及当前发射功率电平来大致估计。 如果邻近基站观测到高干扰，否则发射功率可能会降低。 如果终端位于更靠近观测到高干扰的邻近基站和/或当前发射功率电平较高时，发射功率可以更大量地和/或更频繁地进行调整，反之亦然。 通过将终端的接收的SNR限制在可允许的SNR的范围内，将扇区内的干扰维持在可接受的水平内。

    Multiple modulation technique for use in a communication system
    8.
    发明申请
    Multiple modulation technique for use in a communication system 有权
    用于通信系统的多调制技术

    公开(公告)号：US20060133455A1

    公开(公告)日：2006-06-22

    申请号：US11315743

    申请日：2005-12-21

    申请人： Avneesh Agrawal ,  Aamod Khandekar ,  Arak Sutivong ,  Alexei Gorokhov

    发明人： Avneesh Agrawal ,  Aamod Khandekar ,  Arak Sutivong ,  Alexei Gorokhov

    IPC分类号： H04B1/707 ,  H04K1/10

    CPC分类号： H04L27/0008 ,  H04L27/2627 ,  H04L27/2649

    摘要： A method for receiving an indication to apply a first modulation scheme to modulate one or more segments of the first portion; determining a first segment set, having at least one segment of the first portion for applying said first modulation scheme; modulating said first segment set of the first portion using said first modulation scheme; and modulating one or more segments of the second portion using a second scheme, different from first modulation scheme.

    摘要翻译： 一种用于接收用于应用第一调制方案以调制所述第一部分的一个或多个段的指示的方法; 确定具有用于施加所述第一调制方案的所述第一部分的至少一个段的第一段集合; 使用所述第一调制方案调制所述第一部分的所述第一段集合; 以及使用与第一调制方案不同的第二方案来调制第二部分的一个或多个段。