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    Unified design and centralized scheduling for dynamic SIMO, SU-MIMO and MU-MIMO operation for RL transmissions
    31.
    发明授权
    Unified design and centralized scheduling for dynamic SIMO, SU-MIMO and MU-MIMO operation for RL transmissions 有权
    用于RL传输的动态SIMO，SU-MIMO和MU-MIMO操作的统一设计和集中调度

    公开(公告)号：US08553795B2

    公开(公告)日：2013-10-08

    申请号：US12443796

    申请日：2007-10-30

    申请人： Hao Xu ,  Durga Prasad Malladi

    发明人： Hao Xu ,  Durga Prasad Malladi

    IPC分类号： H04B7/02

    CPC分类号： H04B7/0413 ,  H04B7/0613 ,  H04B7/0684 ,  H04W52/16 ,  H04W52/325

    摘要： Systems and methods facilitate pilot signal design, power control, data rate determination, and channel assignment in the reverse link of a wireless communication system for dynamic scheduling and joint operation in SIMO, SU-MIMO, and MU-MIMO. Pilot signal is based on periodic transmissions of multiple sounding reference sequences for channel estimation. Power control is based on a reference signal at a predetermined power spectral density (PSD) level, and on an offset PSD determined and signaled based on an antenna that transmits the reference signal, other cell interference, and power amplifier headroom. PSD levels for SIMO/MIMO data transmissions are determined based on channel estimates and the predetermined PSD and offset PSD. Such data PSD levels are employed to generate data rates, and to dynamically schedule data streams for communication. Communication resources are conveyed through a channel assignment with an overhead that depends on the maximum multiplexing order of the estimated channel.

    摘要翻译： 系统和方法有助于无线通信系统的反向链路中的导频信号设计，功率控制，数据速率确定和信道分配，用于SIMO，SU-MIMO和MU-MIMO中的动态调度和联合操作。 导频信号基于用于信道估计的多个探测参考序列的周期性传输。 功率控制基于预定功率谱密度（PSD）电平的参考信号，以及基于发送参考信号，其它小区干扰和功率放大器余量的天线确定和发信号的偏移PSD。 基于信道估计和预定PSD和偏移PSD确定用于SIMO / MIMO数据传输的PSD电平。 采用这样的数据PSD电平来产生数据速率，并动态调度用于通信的数据流。 通过信道分配来传送通信资源，开销取决于估计信道的最大复用顺序。

    Systems, apparatus and methods for physical random access channel processing
    32.
    发明授权
    Systems, apparatus and methods for physical random access channel processing 失效
    用于物理随机接入信道处理的系统，装置和方法

    公开(公告)号：US08265642B2

    公开(公告)日：2012-09-11

    申请号：US12816305

    申请日：2010-06-15

    申请人： Xiaoxia Zhang ,  Durga Prasad Malladi ,  Yongbin Wei ,  Hao Xu ,  Tao Luo

    发明人： Xiaoxia Zhang ,  Durga Prasad Malladi ,  Yongbin Wei ,  Hao Xu ,  Tao Luo

    IPC分类号： H04W72/00

    CPC分类号： H04W74/008 ,  H04W74/004 ,  H04W74/0833

    摘要： Systems and methods for processing a physical random access channel are provided. In some embodiments, a method can include: receiving a signal indicative of a strong user and a desired user on a physical random access channel; performing at least one of a single segment frequency domain detection or a multi-segment frequency domain detection on the signal indicative of a strong user and a desired user; generating a residual signal by cancelling out the signal indicative of a strong user; and obtaining a message transmitted by a user equipment by performing at least one of the single segment frequency domain detection or multi-segment frequency domain detection on the residual signal.

    摘要翻译： 提供了用于处理物理随机访问信道的系统和方法。 在一些实施例中，方法可以包括：在物理随机接入信道上接收指示强用户和期望用户的信号; 对指示强用户和期望用户的信号执行单段频域检测或多段频域检测中的至少一个; 通过取消指示强用户的信号来产生残差信号; 以及通过对残差信号进行单段频域检测或多段频域检测中的至少一个来获得由用户设备发送的消息。

    Methods and apparatus for power allocation and/or rate selection for UL MIMO/SIMO operations with PAR considerations
    34.
    发明申请
    Methods and apparatus for power allocation and/or rate selection for UL MIMO/SIMO operations with PAR considerations 有权
    用于具有PAR考虑的UL MIMO / SIMO操作的功率分配和/或速率选择的方法和装置

    公开(公告)号：US20100029320A1

    公开(公告)日：2010-02-04

    申请号：US12444575

    申请日：2007-11-06

    申请人： Durga Prasad Malladi ,  Hao Xu

    发明人： Durga Prasad Malladi ,  Hao Xu

    IPC分类号： H04B7/00 ,  H04L23/02

    CPC分类号： H04W52/367 ,  H04B7/0404 ,  H04L1/0003 ,  H04L5/0023 ,  H04L27/2614 ,  H04W52/146 ,  H04W52/42

    摘要： A method for a wireless communication includes receiving or storing a peak to average (PAR) back off value; and applying the PAR back off value to determine the transmission power and rate for SIMO and MIMO transmissions. In one aspect, the PAR back off value is at least partially based on modulation type. In another aspect, the PAR back off value is more for higher order QAM than for QPSK. The power allocation algorithm for different UL MIMO schemes is described as follows. For MIMO without antenna permutation (e.g. per antenna rate control), different PAR back off values are considered for different data streams. For MIMO with antenna permutation or other unitary transformation such as virtual antenna mapping or precoding, the PAR back off are determined based on combined channel. The transmission data rate depends on power and also the receiver algorithms such as a MMSE receiver or MMSE-SIC receiver.

    摘要翻译： 一种用于无线通信的方法包括：接收或存储峰值平均值（PAR）回退值; 以及应用PAR回退值来确定SIMO和MIMO传输的传输功率和速率。 在一个方面，PAR回退值至少部分地基于调制类型。 在另一方面，对于高阶QAM而言，PAR倒退值比对于QPSK更多。 不同UL MIMO方案的功率分配算法如下。 对于没有天线排列的MIMO（例如，每个天线速率控制），对不同的数据流考虑不同的PAR后退值。 对于具有天线置换或诸如虚拟天线映射或预编码的其它单位变换的MIMO，基于组合信道确定PAR退避。 传输数据速率取决于功率，还有接收机算法，如MMSE接收机或MMSE-SIC接收机。

    ENHANCED MULTIPLEXING SYSTEM AND TECHNIQUE FOR UPLINK CONTROL CHANNELS
    35.
    发明申请
    ENHANCED MULTIPLEXING SYSTEM AND TECHNIQUE FOR UPLINK CONTROL CHANNELS 有权
    增强多路复用系统和上传控制通道的技术

    公开(公告)号：US20090201869A1

    公开(公告)日：2009-08-13

    申请号：US12365845

    申请日：2009-02-04

    申请人： Hao Xu ,  Durga Prasad Malladi ,  Juan Montojo ,  Peter Gaal

    发明人： Hao Xu ,  Durga Prasad Malladi ,  Juan Montojo ,  Peter Gaal

    IPC分类号： H04W72/00 ,  H04L27/28

    CPC分类号： H04L5/0053 ,  H04L1/1671 ,  H04L5/0023 ,  H04L5/0064 ,  H04L5/0092 ,  H04W72/1268

    摘要： A communication system incorporates a multiplexing scheme so that a base node that schedules user equipment (UE) can determine whether an ACK/NACK and/or a service request (SR) has been received when both uplink (UL) transmissions are simultaneously scheduled. Significant complexity reduction, better link efficiency, and higher multiplexing capability since the base node can interpret selective use by the UE of either the ACK/NACK or SR UL channel. Such interpretation can be extended to when multiple downlink (DL) transmission modes can be used, specifically DL single input multiple output (SIMO), DL multiple input multiple output (MIMO) with rank 1 transmission, and DL MIMO with rank 2 transmission. Based upon knowledge of the scheduling and DL transmission mode, the base node does not have to blind decode a number of possibilities due to the mapping of possible responses from the UE. In addition, the multiplexing scheme is applicable to FDD and TDD.

    摘要翻译： 通信系统包括复用方案，使得调度用户设备（UE）的基站节点可以确定当同时调度上行链路（UL）传输时是否已经接收到ACK / NACK和/或服务请求（SR）。 显着的复杂度降低，更好的链路效率和更高的复用能力，因为基站节点可以解释UE对ACK / NACK或SR UL信道的选择性使用。 这样的解释可以扩展到当可以使用多个下行链路（DL）传输模式时，具体地，具有秩1传输的DL单输入多输出（SIMO），DL多输入多输出（MIMO）和具有秩2传输的DL MIMO。 基于调度和DL传输模式的知识，由于来自UE的可能响应的映射，基本节点不必对许多可能性进行盲解码。 另外，复用方案适用于FDD和TDD。

    FEEDBACK AND RATE ADAPTATION FOR MIMO TRANSMISSION IN A TIME DIVISION DUPLEXED (TDD) COMMUNICATION SYSTEM
    36.
    发明申请
    FEEDBACK AND RATE ADAPTATION FOR MIMO TRANSMISSION IN A TIME DIVISION DUPLEXED (TDD) COMMUNICATION SYSTEM 有权
    用于时分双工（TDD）通信系统中的MIMO传输的反馈和速率适应

    公开(公告)号：US20090046800A1

    公开(公告)日：2009-02-19

    申请号：US12181732

    申请日：2008-07-29

    申请人： Hao Xu ,  Durga Prasad Malladi

    发明人： Hao Xu ,  Durga Prasad Malladi

    IPC分类号： H04L1/02 ,  H04B7/00 ,  H04L27/00 ,  H04B7/02

    CPC分类号： H04L25/03343 ,  H04B7/0617 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/10 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L5/0023 ,  H04L5/0051 ,  H04L5/0053 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0248 ,  H04L25/0398 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/261 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

    摘要： Techniques for sending a MIMO transmission in a wireless communication system are described. In one design, a transmitter sends a first reference signal to a receiver. The receiver selects a precoding matrix based on the first reference signal and in accordance with a selection criterion. The receiver estimates noise and interference at the receiver and determines channel quality indicator (CQI) or modulation and coding scheme (MCS) information based on the precoding matrix and the estimated noise and interference. The receiver sends the CQI or MCS information and a second reference signal to the transmitter. The transmitter selects the precoding matrix based on the second reference signal and in accordance with the same selection criterion used by the receiver. The transmitter then sends a MIMO transmission to the receiver based on the CQI or MCS information obtained from the receiver and the precoding matrix selected by the transmitter.

    摘要翻译： 描述了在无线通信系统中发送MIMO传输的技术。 在一种设计中，发射机向接收机发送第一参考信号。 接收机根据第一参考信号并根据选择标准选择预编码矩阵。 接收机估计接收机的噪声和干扰，并且基于预编码矩阵和估计的噪声和干扰来确定信道质量指示符（CQI）或调制和编码方案（MCS）信息。 接收机向发射机发送CQI或MCS信息和第二参考信号。 发射机根据第二参考信号并根据接收机使用的相同选择标准来选择预编码矩阵。 然后，发射机基于从接收机获得的CQI或MCS信息和由发射机选择的预编码矩阵向接收机发送MIMO传输。

    MULTIPLEXING AND POWER CONTROL OF UPLINK CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM
    37.
    发明申请
    MULTIPLEXING AND POWER CONTROL OF UPLINK CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM 有权
    无线通信系统中上拉式控制通道的多路复用和功率控制

    公开(公告)号：US20080287155A1

    公开(公告)日：2008-11-20

    申请号：US12117457

    申请日：2008-05-08

    申请人： Hao Xu ,  Durga Prasad Malladi ,  Rachel Wang

    发明人： Hao Xu ,  Durga Prasad Malladi ,  Rachel Wang

    IPC分类号： H04B7/00

    CPC分类号： H04L5/0051 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0039 ,  H04L5/0053 ,  H04L5/0055 ,  H04L27/2613 ,  H04W52/16 ,  H04W52/241 ,  H04W52/325 ,  H04W52/48

    摘要： Techniques for transmitting control information in a wireless communication system are described. The system may support acknowledgement (ACK) channels and channel quality indicator (CQI) channels, which may have different target signal-to-noise ratios (SNRs). The ACK and CQI channels from different user equipments (UEs) may be multiplexed on the same resource block. In one design, the transmit power of a CQI channel may be set to achieve a nominal target SNR for CQI when not multiplexed with the ACK channels and may be reduced to achieve a lower target SNR when multiplexed with the ACK channels. In another design, the transmit power of an ACK channel may be set to achieve a nominal target SNR for ACK when not multiplexed with the CQI channels and may be boosted to achieve a higher target SNR when multiplexed with the CQI channels. The CQI channel may randomly hop to mitigate performance degradation.

    摘要翻译： 描述用于在无线通信系统中发送控制信息的技术。 该系统可以支持可能具有不同的目标信噪比（SNR）的确认（ACK）信道和信道质量指示符（CQI）信道。 来自不同用户设备（UE）的ACK和CQI信道可以被复用在相同的资源块上。 在一种设计中，可以设置CQI信道的发射功率，以便在不与ACK信道进行多路复用时实现CQI的标称目标SNR，并且当与ACK信道多路复用时，可以减小目标SNR。 在另一种设计中，可以将ACK信道的发射功率设置为在不与CQI信道进行多路复用时实现用于ACK的标称目标SNR，并且当与CQI信道进行多路复用时可以升高以实现更高的目标SNR。 CQI信道可以随机地跳过以减轻性能下降。

    Enhanced multiplexing system and technique for uplink control channels
    40.
    发明授权
    Enhanced multiplexing system and technique for uplink control channels 有权
    用于上行链路控制信道的增强多路复用系统和技术

    公开(公告)号：US08855630B2

    公开(公告)日：2014-10-07

    申请号：US12365845

    申请日：2009-02-04

    申请人： Hao Xu ,  Durga Prasad Malladi ,  Juan Montojo ,  Peter Gaal

    发明人： Hao Xu ,  Durga Prasad Malladi ,  Juan Montojo ,  Peter Gaal

    IPC分类号： H04W4/00

    CPC分类号： H04L5/0053 ,  H04L1/1671 ,  H04L5/0023 ,  H04L5/0064 ,  H04L5/0092 ,  H04W72/1268

    摘要： A communication system incorporates a multiplexing scheme so that a base node that schedules user equipment (UE) can determine whether an ACK/NACK and/or a service request (SR) has been received when both uplink (UL) transmissions are simultaneously scheduled. Significant complexity reduction, better link efficiency, and higher multiplexing capability since the base node can interpret selective use by the UE of either the ACK/NACK or SR UL channel. Such interpretation can be extended to when multiple downlink (DL) transmission modes can be used, specifically DL single input multiple output (SIMO), DL multiple input multiple output (MIMO) with rank 1 transmission, and DL MIMO with rank 2 transmission. Based upon knowledge of the scheduling and DL transmission mode, the base node does not have to blind decode a number of possibilities due to the mapping of possible responses from the UE. In addition, the multiplexing scheme is applicable to FDD and TDD.

    摘要翻译： 通信系统包括复用方案，使得调度用户设备（UE）的基站节点可以确定当同时调度上行链路（UL）传输时是否已经接收到ACK / NACK和/或服务请求（SR）。 显着的复杂度降低，更好的链路效率和更高的复用能力，因为基站节点可以解释UE对ACK / NACK或SR UL信道的选择性使用。 这样的解释可以扩展到当可以使用多个下行链路（DL）传输模式时，具体地，具有秩1传输的DL单输入多输出（SIMO），DL多输入多输出（MIMO）和具有秩2传输的DL MIMO。 基于调度和DL传输模式的知识，由于来自UE的可能响应的映射，基本节点不必对许多可能性进行盲解码。 另外，复用方案适用于FDD和TDD。