公开(公告)号：EP2512058A1

公开(公告)日：2012-10-17

申请号：EP12176160.5

申请日：2005-07-29

申请人： Qualcomm Incorporated

发明人： Wang, Michael Mao ,  Ling, Fuyun ,  Vijayan, Rajiv ,  Murali, Ramaswamy

IPC分类号： H04L1/00 ,  H03M13/27 ,  H04L27/26 ,  H04L5/00

CPC分类号： H04L1/0071 ,  H03M13/27 ,  H03M13/271 ,  H03M13/2757 ,  H03M13/276 ,  H03M13/2771 ,  H04L1/00 ,  H04L1/0041 ,  H04L1/0066 ,  H04L1/007 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0083 ,  H04L25/0226 ,  H04L27/2607 ,  H04L27/261 ,  H04L27/2626 ,  H04L27/2656 ,  H04L27/2662

摘要： A method for improving frequency diversity in an OFDM system using interleaved interlaces for constellation symbol interleaving comprises interleaving a number of subcarriers of an interlace in a bit reversal fashion and interleaving a number of interlaces in the bit reversal fashion.

摘要翻译： 一种用于改善使用用于星座符号交织的交错交错的OFDM系统中的频率分集的方法包括以比特反转方式交织交织的多个子载波并且以比特反转方式交织多个交织。

公开(公告)号：EP1976212A1

公开(公告)日：2008-10-01

申请号：EP08012661.8

申请日：2005-01-07

申请人： Qualcomm Incorporated

发明人： Vijayan, Rajiv ,  Gupta, Alok Kumar ,  Krishnamoorthi, Raghuraman

IPC分类号： H04L27/26

CPC分类号： H04L27/2656 ,  H04L27/2657 ,  H04L27/2675

摘要： Frequency error estimation and frame synchronization are performed at a receiver in an OFDM system based on a metric that is indicative of detected pilot power. The metric may be defined based on cross-correlation between two received symbols obtained in two OFDM symbol periods. For frequency error estimation, a metric value is computed for each of multiple hypothesized frequency errors. The hypothesized frequency error for the metric value with the largest magnitude is provided as the estimated frequency error. For frame synchronization, a correlation value is obtained for each OFDM symbol period by correlating metric values obtained for NC (e.g., most recent) OFDM symbol periods with NC expected values. The expected values are computed in a manner consistent with the manner in which the metric values are computed. Peak detection is performed on the correlation values obtained for different OFDM symbol periods to determine frame synchronization.

摘要翻译： 基于指示检测到的导频功率的度量，在OFDM系统中的接收机处执行频率误差估计和帧同步。 可以基于在两个OFDM符号周期中获得的两个接收符号之间的互相关来定义度量。 对于频率误差估计，针对多个假设频率误差中的每一个计算度量值。 提供具有最大幅度的度量值的假设频率误差作为估计的频率误差。 对于帧同步，通过将为NC（例如，最近的）OFDM符号周期获得的度量值与NC预期值相关联，为每个OFDM符号周期获得相关值。 以与计算度量值的方式一致的方式计算期望值。 对针对不同的OFDM符号周期获得的相关值执行峰值检测以确定帧同步。

公开(公告)号：EP2378701B1

公开(公告)日：2014-02-12

申请号：EP11174166.6

申请日：2003-10-29

申请人： Qualcomm Incorporated

发明人： Krishnan, Ranganathan ,  Vijayan, Rajiv ,  Kadous, Tamer

IPC分类号： H04L5/00 ,  H04L1/00 ,  H04L1/16 ,  H04L25/03 ,  H04W52/32 ,  H04L25/02 ,  H04L27/26 ,  H04W52/22 ,  H04W52/42 ,  H04W52/34

CPC分类号： H04W52/325 ,  H04L1/0004 ,  H04L1/1614 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0041 ,  H04L5/005 ,  H04L5/0053 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/023 ,  H04L25/03821 ,  H04L27/2607 ,  H04L27/2657 ,  H04L27/2662 ,  H04W52/225 ,  H04W52/346 ,  H04W52/42

公开(公告)号：EP2378682A3

公开(公告)日：2012-01-18

申请号：EP11168263.9

申请日：2004-02-17

申请人： Qualcomm Incorporated

发明人： Vijayan, Rajiv ,  Agrawal, Avneesh ,  Jha, Sanjay K.

IPC分类号： H04J1/00 ,  H04L5/00 ,  H04L27/26 ,  H04W72/04 ,  H04W52/34

CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0066 ,  H04L27/2614 ,  H04W52/343 ,  H04W52/367

摘要： Techniques for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Different terminals in a multiple-access system may have different required transmit powers. The number of carriers to allocate to each terminal is made dependent on its required transmit power. Terminals with higher required transmit powers may be allocated fewer carriers (associated with smaller PAPR) to allow the power amplifier to operate at higher power levels. Terminals with lower required transmit powers may be allocated more carriers (associated with higher PAPR) since the power amplifier is operated at lower power levels. The specific carriers to assign to the terminals may also be determined by their transmit power levels to reduce out-of-band emissions. Terminals with higher required transmit powers may be assigned with carriers near the middle of the operating band, and terminals with lower required transmit powers may be assigned with carriers near the band edges.

摘要翻译： 技术来管理的峰 - 平均值在无线通信系统中的多载波调制功率比（PAPR）。 不同的终端中的多址系统可以具有不同的所需的发射功率。 载波分配给每个终端的数量是由依赖于它的所需发送功率。 具有较高的所需发射功率的终端可被分配较少的载流子（具有较小PAPR相关联），以允许所述功率放大器以更高的功率电平操作。 由于功率放大器在较低的功率水平操作具有较低要求的发射功率的终端可被分配一个以上载波（具有较高PAPR相关联）。 的特定载波分配给因此可以通过它们的发射功率电平来确定的开采的端子，以减少外的带外发射。 具有较高的所需发送功率的终端可以与工作频带的中部附近载波进行分配，并以较低的所需发射功率的终端可以与附近的频带边缘载波来分配。

公开(公告)号：EP2378700A1

公开(公告)日：2011-10-19

申请号：EP11174161.7

申请日：2003-10-29

申请人： Qualcomm Incorporated

发明人： Krishnan, Ranganathan ,  Vijayan, Rajiv ,  Kadous, Tamer

IPC分类号： H04L5/00

CPC分类号： H04W52/325 ,  H04L1/0004 ,  H04L1/1614 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0041 ,  H04L5/005 ,  H04L5/0053 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/023 ,  H04L25/03821 ,  H04L27/2607 ,  H04L27/2657 ,  H04L27/2662 ,  H04W52/225 ,  H04W52/346 ,  H04W52/42

摘要： Techniques to more efficiently transmit pilot and signaling on the uplink in an OFDM system. With subband multiplexing, M usable subbands in the system are partitioned into Q disjoint groups of subbands. Each subband group may be assigned to a different terminal for uplink pilot transmission. Multiple terminals may transmit simultaneously on their assigned subbands. The transmit power for the pilot may be scaled higher to attain the same total pilot energy even though S instead of M subbands are used for pilot transmission by each terminal. Pilot transmissions from the terminals are received, and a channel estimate is derived for each terminal based on the pilot received on the assigned subbands. The channel estimate comprises a response for additional subbands not included in the assigned group. Subband multiplexing may also be used for uplink signaling transmission.

摘要翻译： 在OFDM系统中在上行链路上更有效地发送导频和信令的技术。 通过子带复用，系统中的M个可用子带被划分成Q个不相关的子带组。 每个子带组可被分配给用于上行链路导频传输的不同终端。 多个终端可以在其分配的子带上同时发送。 即使S代替M个子带用于每个终端的导频传输，导频的发射功率可以被更高地扩展以获得相同的总导频能量。 接收来自终端的导频传输，并且基于在所分配的子带上接收到的导频，为每个终端导出信道估计。 信道估计包括对未分配组中未包括的附加子带的响应。 子带复用也可以用于上行链路信令传输。

公开(公告)号：EP2190203A1

公开(公告)日：2010-05-26

申请号：EP10155803.9

申请日：2004-10-22

申请人： Qualcomm Incorporated

发明人： Chari, Murali Ramaswamy ,  Walker, Gordon Kent ,  Vijayan, Rajiv

IPC分类号： H04N7/24

CPC分类号： H04N5/4401 ,  H04N5/50 ,  H04N21/41407 ,  H04N21/4345 ,  H04N21/4384 ,  H04N21/44222

摘要： Techniques to seamlessly switch reception between multimedia programs are described. For 'continued decoding', a wireless device continues to receive, decode, decompress, and (optionally) display a current program, even after a new program has been selected, until overhead information needed to decode the new program is received. After receiving the overhead information, the wireless device decodes the new program but continues to decompress the current program. The wireless device decompresses the new program after decoding this program. For 'carly decoding', the wireless device receives a user input and identifies a program with potential for user selection. The identified program may be the one highlighted by the user input or a program anticipated to be selected based on the user input. The wireless device initiates decoding of the identified program, prior to its selection, so that the program can be decompressed and displayed earlier if it is subsequently selected.

摘要翻译： 描述了在多媒体节目之间无缝切换接收的技术。 对于“继续解码”，即使在选择新节目之后，无线设备仍继续接收，解码，解压缩和（可选地）显示当前节目，直到接收到解码新节目所需的开销信息。 在接收到开销信息之后，无线设备解码新节目，但继续解压当前节目。 解码此程序后，无线设备将解压新程序。 对于“carly解码”，无线设备接收用户输入并识别具有用户选择潜力的节目。 所识别的节目可以是由用户输入突出显示的节目或预期基于用户输入选择的节目。 无线设备在选择之前启动对所识别节目的解码，以便如果随后选择该节目，则可以提前解压缩和显示该节目。

公开(公告)号：EP2317663B1

公开(公告)日：2018-05-30

申请号：EP10168345.6

申请日：2003-10-14

申请人： Qualcomm Incorporated

发明人： Agrawal, Avneesh ,  Vijayan, Rajiv ,  Kadous, Tamer

IPC分类号： H04B7/00 ,  H04B7/02

CPC分类号： H04L1/0618 ,  H04B7/0417 ,  H04B7/0443 ,  H04B7/0465 ,  H04B7/0615 ,  H04B7/0891 ,  H04W52/34 ,  H04W52/42

摘要： A rate adaptive transmission scheme for MIMO systems, which can transmit a variable number of data symbol streams, provide transmit diversity for each data symbol stream, and fully utilize the total transmit power of the system and the full power of each antenna. In one method, at least one data symbol stream is received for transmission from a plurality of antennas. Each data symbol stream is scaled with a respective weight corresponding to the amount of transmit power allocated to that stream. The scaled data symbol stream(s) are multiplied with a transmit basis matrix to provide a plurality of transmit symbol streams for the plurality of antennas.; The transmit basis matrix (e.g., a Walsh-Hadamard matrix or a DFT matrix) is defined such that each data symbol stream is transmitted from all antennas and each transmit symbol stream is transmitted at (or near) the full power for the associated antenna.

公开(公告)号：EP2378682B1

公开(公告)日：2016-02-10

申请号：EP11168263.9

申请日：2004-02-17

申请人： Qualcomm Incorporated

发明人： Vijayan, Rajiv ,  Agrawal, Avneesh ,  Jha, Sanjay K.

IPC分类号： H04J1/00 ,  H04L5/00 ,  H04L27/26 ,  H04W72/04 ,  H04W52/34

CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0066 ,  H04L27/2614 ,  H04W52/343 ,  H04W52/367

摘要： Techniques for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Different terminals in a multiple-access system may have different required transmit powers. The number of carriers to allocate to each terminal is made dependent on its required transmit power. Terminals with higher required transmit powers may be allocated fewer carriers (associated with smaller PAPR) to allow the power amplifier to operate at higher power levels. Terminals with lower required transmit powers may be allocated more carriers (associated with higher PAPR) since the power amplifier is operated at lower power levels. The specific carriers to assign to the terminals may also be determined by their transmit power levels to reduce out-of-band emissions. Terminals with higher required transmit powers may be assigned with carriers near the middle of the operating band, and terminals with lower required transmit powers may be assigned with carriers near the band edges.

公开(公告)号：EP2378701A1

公开(公告)日：2011-10-19

申请号：EP11174166.6

申请日：2003-10-29

申请人： Qualcomm Incorporated

发明人： Krishnan, Ranganathan ,  Vijayan, Rajiv ,  Kadous, Tamer

IPC分类号： H04L5/00

CPC分类号： H04W52/325 ,  H04L1/0004 ,  H04L1/1614 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0041 ,  H04L5/005 ,  H04L5/0053 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/023 ,  H04L25/03821 ,  H04L27/2607 ,  H04L27/2657 ,  H04L27/2662 ,  H04W52/225 ,  H04W52/346 ,  H04W52/42

摘要： Techniques to more efficiently transmit pilot and signaling on the uplink in an OFDM system. With subband multiplexing, M usable subbands in the system are partitioned into Q disjoint groups of subbands. Each subband group may be assigned to a different terminal for uplink pilot transmission. Multiple terminals may transmit simultaneously on their assigned subbands. The transmit power for the pilot may be scaled higher to attain the same total pilot energy even though S instead of M subbands are used for pilot transmission by each terminal. Pilot transmissions from the terminals are received, and a channel estimate is derived for each terminal based on the pilot received on the assigned subbands. The channel estimate comprises a response for additional subbands not included in the assigned group. Subband multiplexing may also be used for uplink signaling transmission.

摘要翻译： 用于在OFDM系统中更高效地在上行链路上发送导频和信令的技术。 通过子带复用，系统中M个可用的子带被划分成Q个不相交的子带组。 每个子带组可以被分配给用于上行链路导频传输的不同终端。 多个终端可以在其分配的子带上同时传输。 即使使用S而不是M个子带用于每个终端的导频传输，导频的发射功率也可以被调高以达到相同的总导频能量。 接收来自终端的导频传输，并基于在所分配的子带上接收的导频为每个终端导出信道估计。 信道估计包括对未包括在分配组中的附加子带的响应。 子带复用也可以用于上行链路信令传输。

公开(公告)号：EP2234282A1

公开(公告)日：2010-09-29

申请号：EP10168347.2

申请日：2003-10-14

申请人： Qualcomm Incorporated

发明人： Agrawal, Avneesh ,  Vijayan, Rajiv ,  Kadous, Tamer

IPC分类号： H04B7/00 ,  H04B7/02

CPC分类号： H04L1/0618 ,  H04B7/0417 ,  H04B7/0443 ,  H04B7/0465 ,  H04B7/0615 ,  H04B7/0891 ,  H04W52/34 ,  H04W52/42

摘要： A rate adaptive transmission scheme for MIMO systems, which can transmit a variable number of data symbol streams, provide transmit diversity for each data symbol stream, and fully utilize the total transmit power of the system and the full power of each antenna. In one method, at least one data symbol stream is received for transmission from a plurality of antennas. Each data symbol stream is scaled with a respective weight corresponding to the amount of transmit power allocated to that stream. The scaled data symbol stream(s) are multiplied with a transmit basis matrix to provide a plurality of transmit symbol streams for the plurality of antennas. The transmit basis matrix (e.g., a Walsh-Hadamard matrix or a DFT matrix) is defined such that each data symbol stream is transmitted from all antennas and each transmit symbol stream is transmitted at (or near) the full power for the associated antenna.

摘要翻译： 可以传输可变数量的数据符号流的MIMO系统的速率自适应传输方案为每个数据符号流提供发射分集，并充分利用系统的总发射功率和每个天线的全功率。 在一种方法中，接收至少一个数据符号流用于从多个天线发射。 每个数据符号流以对应于分配给该流的发射功率的量的相应权重进行缩放。 缩放的数据符号流与发射基矩阵相乘以为多个天线提供多个发射符号流。 定义发射基矩阵（例如，沃尔什 - 哈达玛矩阵或DFT矩阵），使得每个数据符号流从所有天线发送，并且每个发射符号流以相关天线的（或接近）全功率发射。