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328 条记录 (耗时 0.049 秒)

    Systems and methods for providing adaptive pulse position modulated code division multiple access for ultra-wideband communication links
    91.
    发明授权
    Systems and methods for providing adaptive pulse position modulated code division multiple access for ultra-wideband communication links 有权
    为超宽带通信链路提供自适应脉冲位置调制码分多址的系统和方法

    公开(公告)号：US07187715B2

    公开(公告)日：2007-03-06

    申请号：US10252351

    申请日：2002-09-23

    申请人： Krishna Balachandran ,  Doru Calin ,  Tingfang Ji ,  Joseph H. Kang

    发明人： Krishna Balachandran ,  Doru Calin ,  Tingfang Ji ,  Joseph H. Kang

    IPC分类号： H04B14/04

    CPC分类号： H04B1/7176 ,  H04B2001/6908 ,  H04L25/4902

    摘要： An adaptive pulse position modulated CDMA scheme for use in UWB communications systems is disclosed. A stream of input bits is encoded with spreading code sequence. The spreading code sequence consists of a number of code elements that may have one of two values. Each bit is encoded into a symbol consisting of a predefined number of chips, which are transmitted during a symbol period. Next, at least one code element is associated with each chip in the symbol. Then, an encoded pulse is generated in each chip. Each encoded pulse has a value determined by multiplying the data bit with the code value associated with the particular chip. The encoded pulse is then pulse position modulated by shifting the position of the pulse to a first position or a second position within the chip depending upon the encoded value of the pulse.

    摘要翻译： 公开了一种用于UWB通信系统的自适应脉冲位置调制CDMA方案。 输入比特流用扩展码序列编码。 扩展码序列由可能具有两个值之一的多个代码元素组成。 每个位被编码成由符号周期内发送的预定数量的芯片组成的符号。 接下来，至少一个代码元素与符号中的每个芯片相关联。 然后，在每个芯片中产生编码脉冲。 每个编码脉冲具有通过将数据位与与特定芯片相关联的代码值相乘确定的值。 然后根据脉冲的编码值，将脉冲的位置移位到芯片内的第一位置或第二位置，从而进行脉冲位置调制。

    Power control and overlapping control for a quasi-orthogonal communication system
    94.
    发明申请
    Power control and overlapping control for a quasi-orthogonal communication system 有权

    公开(公告)号：US20060211441A1

    公开(公告)日：2006-09-21

    申请号：US11158587

    申请日：2005-06-21

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

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

    IPC分类号： H04B7/00

    CPC分类号： H04W52/243 ,  H04W52/34

    摘要： Techniques for controlling transmit power and the amount of overlapping in a quasi-orthogonal system are described. A base station for a sector receives transmissions from terminals in that sector and neighbor sectors and determines performance metrics (e.g., overall throughput) and/or QoS metrics (e.g., minimum data rate) for the terminals in the sector. The base station updates an overlapping factor based on the performance metrics and updates a QoS power control parameter based on the QoS metrics. The overlapping factor indicates the average number of overlapping transmissions sent simultaneously on each time-frequency block usable for data transmission. The QoS power control parameter ensures that the terminals in the sector can achieve minimum QoS requirements. A power control mechanism with multiple loops is used to adjust the transmit power of each terminal. The overlapping factor and QoS power control parameter are updated by two of the loops.

    Restrictive reuse set management
    95.
    发明申请
    Restrictive reuse set management 有权
    限制性重用集管理

    公开(公告)号：US20060019701A1

    公开(公告)日：2006-01-26

    申请号：US11021189

    申请日：2004-12-22

    申请人： Tingfang Ji

    发明人： Tingfang Ji

    IPC分类号： H04Q7/20

    CPC分类号： H04W16/04 ,  H04W16/02 ,  H04W16/12 ,  H04W28/08 ,  H04W28/24 ,  H04W72/0453

    摘要： A restrictive reuse set management algorithm for equal grade of service on a forward link (FL) transmission is described. While a restrictive reuse algorithm is known to improve the SINR of weak users in interference limited networks, the fairness issue associated with restrictive reuse has not been explored. The bandwidth allocated to each reuse set, the reuse set loading and the harmonic mean of the spectral efficiencies of all users sharing the reuse set are used to estimate the equal-grade-of-service (EGoS) user throughput over the reuse set. An iterative algorithm is then designed to maximize the sector throughput under the constraint of equal user throughput over all reuse sets.

    摘要翻译： 描述了用于前向链路（FL）传输上的相等等级服务的限制性重用集管理算法。 虽然已知限制性重用算法可以改善干扰受限网络中弱用户的SINR，但是还没有探讨与限制性重用相关的公平性问题。 分配给每个重用集合的带宽，重用集负载和共享重用集合的所有用户的频谱效率的谐波均值用于估计重用集合中的等等服务（EGoS）用户吞吐量。 然后设计迭代算法以在所有重用集合下的相同用户吞吐量的约束下最大化扇区吞吐量。

    Techniques for supporting relay operation in wireless communication systems
    97.
    发明授权
    Techniques for supporting relay operation in wireless communication systems 有权
    支持无线通信系统中的中继操作的技术

    公开(公告)号：US09294219B2

    公开(公告)日：2016-03-22

    申请号：US12568255

    申请日：2009-09-28

    申请人： Ravi Palanki ,  Kapil Bhattad ,  Naga Bhushan ,  Aamod D. Khandekar ,  Tingfang Ji ,  Juan Montojo

    发明人： Ravi Palanki ,  Kapil Bhattad ,  Naga Bhushan ,  Aamod D. Khandekar ,  Tingfang Ji ,  Juan Montojo

    IPC分类号： H04L1/00 ,  H04W28/00 ,  H04B7/26 ,  H04B7/155 ,  H04J3/08 ,  H04L5/00 ,  H04W4/06

    CPC分类号： H04L1/0023 ,  H04B7/15557 ,  H04B7/2606 ,  H04J3/08 ,  H04L1/0001 ,  H04L5/0037 ,  H04W4/06 ,  H04W28/00

    摘要： Techniques for supporting operation of relay stations in wireless communication systems are described. In an aspect, a base station may transmit data to a relay station in a portion of a subframe instead of the entire subframe. The relay station may transmit control information during part of the subframe. The base station may transmit data to the relay station during the remaining part of the subframe. In another aspect, a target termination for a packet may be selected based on data and/or ACK transmission opportunities available for the packet. One or more transmissions of the packet may be sent with HARQ, and ACK information may be sent for the packet. The packet may be transmitted such that it can be terminated prior to the first subframe (i) not available for sending the packet or (ii) available for sending ACK information.

    摘要翻译： 描述了用于支持无线通信系统中的中继站的操作的技术。 在一方面，基站可以在子帧的一部分而不是整个子帧中向中继站发送数据。 中继站可以在子帧的一部分期间发送控制信息。 基站可以在子帧的剩余部分期间向中继站发送数据。 在另一方面，可以基于可用于分组的数据和/或ACK传输机会来选择分组的目标终止。 可以用HARQ发送分组的一个或多个传输，并且可以为分组发送ACK信息。 可以发送分组，使得其可以在第一子帧（i）不可用于发送分组之前终止，或者（ii）可用于发送ACK信息。

    Data transmission via a relay station in a wireless communication system
    99.
    发明授权
    Data transmission via a relay station in a wireless communication system 有权
    通过无线通信系统中的中继站进行数据传输

    公开(公告)号：US09203564B2

    公开(公告)日：2015-12-01

    申请号：US12580872

    申请日：2009-10-16

    申请人： Ravi Palanki ,  Kapil Bhattad ,  Naga Bhushan ,  Aamod D. Khandekar ,  Tingfang Ji ,  Juan Montojo

    发明人： Ravi Palanki ,  Kapil Bhattad ,  Naga Bhushan ,  Aamod D. Khandekar ,  Tingfang Ji ,  Juan Montojo

    IPC分类号： H04L1/18 ,  H04B7/26

    CPC分类号： H04L1/1867 ,  H04B7/2606

    摘要： Techniques for supporting data transmission via a relay station are described. In an aspect, data transmission may be supported using ACK-and-suspend. A transmitter station sends a first transmission of a packet to a receiver station. The transmitter station receives no ACK information for the first transmission of the packet and suspends transmission of the packet. The transmitter station thereafter receives an indication to resume transmission of the packet and, in response, sends a second transmission of the packet. In another aspect, different ACK timeline may be used when applicable. The receiver station may send ACK information in a designated subframe if available for use or in a different subframe. In yet another aspect, ACK repetition may be used. The receiver may send ACK information in multiple subframes to facilitate reception of the ACK information when the transmitter station is unable to receive one or more of the multiple subframes.

    摘要翻译： 描述了通过中继站支持数据传输的技术。 在一方面，可以使用ACK和挂起来支持数据传输。 发送站发送分组的第一次发送到接收站。 发送台不接收用于分组的第一次发送的ACK信息，并且暂停分组的发送。 然后，发送站接收到恢复分组的发送的指示，并且作为响应，发送分组的第二发送。 在另一方面，当适用时可以使用不同的ACK时间线。 接收站可以在指定的子帧中发送ACK信息，如果可以使用或在不同的子帧中。 在另一方面，可以使用ACK重复。 接收机可以在多个子帧中发送ACK信息，以便当发射机站不能接收多个子帧中的一个或多个时，接收ACK信息。