公开(公告)号：US20090122731A1

公开(公告)日：2009-05-14

申请号：US12206624

申请日：2008-09-08

申请人： Juan Montojo ,  Durga Malladi ,  Shimman Patel

发明人： Juan Montojo ,  Durga Malladi ,  Shimman Patel

IPC分类号： H04J11/00 ,  H04L5/14

CPC分类号： H04L27/2647 ,  H04L5/1484 ,  H04L27/2607

摘要： Techniques for performing partial cyclic prefix discarding are described. A user equipment (UE) may reduce the amount of cyclic prefix to discard for the last OFDM symbol prior to a switch from data reception to data transmission. This may allow the UE to complete data reception earlier and to switch to data transmission in a timely manner. In one design, the UE may receive a first OFDM symbol and discard a first amount of cyclic prefix for the first OFDM symbol. The UE may then receive a second OFDM symbol and discard a second amount of cyclic prefix for the second OFDM symbol. The second amount of cyclic prefix to discard may be determined based on the amount of time needed to switch from data reception to data transmission, which may be dependent on the amount of time advance between transmit timing and receive timing at the UE.

摘要翻译： 描述用于执行部分循环前缀丢弃的技术。 在从数据接收切换到数据传输之前，用户设备（UE）可以减少循环前缀的数量以丢弃最后的OFDM符号。 这可以允许UE更早地完成数据接收并及时切换到数据传输。 在一种设计中，UE可以接收第一OFDM符号并且丢弃用于第一OFDM符号的第一数量的循环前缀。 然后，UE可以接收第二OFDM符号并且丢弃用于第二OFDM符号的第二数量的循环前缀。 可以基于从数据接收切换到数据传输所需的时间量来确定丢弃的第二量的循环前缀，其可以取决于在UE处的发送定时和接收定时之间的时间推进量。

公开(公告)号：US20080089286A1

公开(公告)日：2008-04-17

申请号：US11775198

申请日：2007-07-09

申请人： Durga Malladi ,  Byoung-Hoon Kim

发明人： Durga Malladi ,  Byoung-Hoon Kim

IPC分类号： H04L5/22

CPC分类号： H04L27/2602 ,  H04B1/7143 ,  H04B7/2615

摘要： Facilitating frequency hopping for single carrier, frequency division multiple access (SC-FDMA) transmission is described herein. By way of example, user data transmitted within a transmission allocation unit can be frequency shifted with respect to time based slots of the allocation unit. As a result, frequency hopping can be accomplished while preserving single carrier constraints and a low peak to average power ratio (PAPR). Furthermore, various frequency shifted mechanisms are disclosed to accomplish preservation of single carrier restraints. For example, a scheduler can select between cyclic frequency shifting, transposed frequency shifting, and multiplexing of frequency selective scheduled and frequency hopped data based on an audit of scheduled data for the transmission allocation unit. As a result, the reduction in interference achieved through frequency hopping can be combined with the low PAPR for various data allocation configurations.

摘要翻译： 本文描述了单载波，频分多址（SC-FDMA）传输的便利跳频。 作为示例，在发送分配单元内发送的用户数据可以相对于分配单元的基于时间的时隙进行频移。 因此，可以在保持单载波约束和低峰均功率比（PAPR）的同时实现跳频。 此外，公开了各种频移机构来实现单载波约束的保存。 例如，调度器可以基于用于传输分配单元的调度数据的审计，在循环频移，转置频移和频率选择性调度和跳频数据的多路复用之间进行选择。 结果，通过跳频实现的干扰的减少可以与用于各种数据分配配置的低PAPR组合。

公开(公告)号：US20080002763A1

公开(公告)日：2008-01-03

申请号：US11856678

申请日：2007-09-17

申请人： Yongbin Wei ,  Durga Malladi ,  Josef Blanz

发明人： Yongbin Wei ,  Durga Malladi ,  Josef Blanz

IPC分类号： H03H7/30 ,  H03H7/40

CPC分类号： H04B1/7105 ,  H04B2201/70701 ,  H04L25/0228 ,  H04L25/03044 ,  H04L2025/03509 ,  H04L2025/03522 ,  H04L2025/03598 ,  H04L2025/03617

摘要： In a wireless communication system, a method for estimating a transmitted signal is disclosed. A wireless signal is received that includes a pilot channel and at least one other channel. A transmitted signal is estimated using an equalizer and the received wireless signal. The equalizer includes a filter with a plurality of taps that are adapted through use of an adaptive algorithm that uses an estimated pilot estimated from the received wireless signal. The pilot channel is transmitted in the wireless signal that included the at least one other channel. The estimated pilot is extracted and provided to the adaptive algorithm.

摘要翻译： 在无线通信系统中，公开了一种用于估计发送信号的方法。 接收包括导频信道和至少一个其它信道的无线信号。 使用均衡器和接收到的无线信号来估计发送信号。 均衡器包括具有多个抽头的滤波器，其通过使用自适应算法来适配，所述自适应算法使用从所接收的无线信号估计的估计导频。 在包括至少一个其他信道的无线信号中发送导频信道。 估计的导频被提取并提供给自适应算法。

公开(公告)号：US20070242770A1

公开(公告)日：2007-10-18

申请号：US11686952

申请日：2007-03-15

申请人： Byoung-Hoon Kim ,  Durga Malladi ,  Jelena Damnjanovic

发明人： Byoung-Hoon Kim ,  Durga Malladi ,  Jelena Damnjanovic

IPC分类号： H04L1/02

CPC分类号： H04L1/0026 ,  H04B7/0632 ,  H04B7/0641 ,  H04B7/066 ,  H04L1/0029 ,  H04L1/06 ,  H04L27/2608

摘要： Techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency; across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennas, different precoding vectors, etc. Channel quality indicator (CQI) values may be obtained for the multiple spatial channels on the multiple subbands. The CQI values may be differentially encoded across the multiple spatial channels and the multiple subbands to obtain differential CQI information. In another design, CQI values may be obtained for multiple spatial channels on the multiple subbands in multiple time intervals and may be differentially encoded across space, frequency and time. The differential CQI information and the spatial state information may be sent as feedback.

摘要翻译： 描述使用差分编码有效地发送信道状态信息的技术。 差分编码可以跨越空间跨越频率执行; 跨越空间和频率，跨越空间，频率和时间，或跨越其他尺寸的组合。 在一种设计中，可以为多个子带上的多个空间信道确定空间状态信息。 空间信道可以对应于不同的天线，不同的预编码向量等。可以为多个子带上的多个空间信道获得信道质量指示符（CQI）值。 CQI值可以在多个空间信道和多个子带之间进行差分编码，以获得差分CQI信息。 在另一种设计中，可以在多个时间间隔中对多个子带上的多个空间信道获得CQI值，并且可以在空间，频率和时间之间进行差分编码。 差分CQI信息和空间状态信息可以作为反馈发送。

公开(公告)号：US20070162829A1

公开(公告)日：2007-07-12

申请号：US11623699

申请日：2007-01-16

申请人： Yongbin Wei ,  Durga Malladi ,  Tao Chen ,  Edward Tiedemann

发明人： Yongbin Wei ,  Durga Malladi ,  Tao Chen ,  Edward Tiedemann

IPC分类号： H03M13/00

CPC分类号： H03M13/35 ,  H03M13/29 ,  H03M13/2903 ,  H03M13/2927 ,  H03M13/2966 ,  H03M13/6513 ,  H04B1/707 ,  H04L1/0002 ,  H04L1/0006 ,  H04L1/0065

摘要： A method and apparatus for transmitting and receiving data provide for efficient use communication resources by encoding data in accordance with a first code to produce a block of data, determining transmission data rate of a time frame, selecting a portion of the block of data based on the determined transmission data rate, adding a location identifier data to the portion of data to produce a payload data, wherein the location identifier identifies a location of the portion of data within the block of data, and encoding the payload data in accordance with a second code to produce a packet of data for transmission over the time frame. A transmitter transmits the packet of data over the time frame at the determined data rate. A receiver receives the packet of data over the time frame, and processes the received data accordingly to reproduce the block of data.

摘要翻译： 用于发送和接收数据的方法和装置通过根据第一代码对数据进行编码来提供有效利用的通信资源，以产生数据块，确定时间帧的传输数据速率，基于 所确定的传输数据速率，将位置标识符数据添加到所述数据部分以产生有效载荷数据，其中所述位置标识符识别所述数据块内的所述部分数据的位置，并且根据第二数据对所述有效载荷数据进行编码 用于产生用于在时间框架上传输的数据分组的代码。 发射机以确定的数据速率在时间帧上发送数据分组。 接收器在时间帧上接收数据包，并相应地处理接收到的数据以再现数据块。

公开(公告)号：US20070097914A1

公开(公告)日：2007-05-03

申请号：US11552514

申请日：2006-10-24

申请人： Francesco Grilli ,  Oronzo Flore ,  Etienne Chapponniere ,  Juan Montojo ,  Masato Kitazoe ,  Nathan Tenny ,  Durga Malladi

发明人： Francesco Grilli ,  Oronzo Flore ,  Etienne Chapponniere ,  Juan Montojo ,  Masato Kitazoe ,  Nathan Tenny ,  Durga Malladi

IPC分类号： H04Q7/00

CPC分类号： H04W36/0088 ,  H04W36/0055 ,  H04W36/14

摘要： Described herein are mechanisms and methods that facilitate preparation of inter-radio access technology (inter-RAT) and/or inter-frequency handover with respect to a mobile device (user equipment). User equipment can indicate to a network servicing the user equipment that the user equipment desires to perform measurements with respect to a different frequency and/or different technology. Data on the downlink channel can then be scheduled to ensure that data intended for the user equipment is not lost while the user equipment is performing the measurements.

摘要翻译： 这里描述了有助于准备相对于移动设备（用户设备）的无线电间接入技术（RAT间）和/或频间切换的机制和方法。 用户设备可以向服务用户设备的网络指示用户设备希望相对于不同频率和/或不同技术执行测量。 然后可以调度下行链路信道上的数据，以确保在用户设备执行测量时不会丢失用于用户设备的数据。

公开(公告)号：US20060268919A1

公开(公告)日：2006-11-30

申请号：US11376604

申请日：2006-03-14

申请人： Durga Malladi ,  Peter Gaal ,  Yongbin Wei

发明人： Durga Malladi ,  Peter Gaal ,  Yongbin Wei

IPC分类号： H04J3/26

CPC分类号： H04L1/0029 ,  H04L1/0003 ,  H04L1/0025

摘要： In a wireless network (100) with HSDPA-enabled user equipment devices (130), the base transceiver station (120) transmits to each HSDPA-enabled UE information regarding allocation of HSDPA codes and associated modulation techniques for other HSDPA-enabled UEs. Using this additional control information, each UE configures decision feedback filter of its equalizer to reduce inter-user interference. The additional control information may be transmitted in a packet (300) that includes a CRC portion (310) with the packet's CRC masked by a common ID, which is known to the HSDPA-enabled UEs. To reduce the number of bits needed to transmit the additional control information, the HSDPA codes used with a particular modulation technique are allocated consecutively. For each modulation technique, only the beginning code and the total number of codes need be known to the UEs. The number of codes used with each modulation technique may be allowed to change once in several TTIs.

摘要翻译： 在具有支持HSDPA的用户设备（130）的无线网络（100）中，基站收发器（120）向每个支持HSDPA的UE发送关于其他支持HSDPA的UE的HSDPA代码分配和相关调制技术的信息。 使用该附加控制信息，每个UE配置其均衡器的判决反馈滤波器以减少用户间干扰。 附加控制信息可以在包括CRC部分（310）的分组（300）中发送，其中分组的CRC被公共ID掩蔽，这是启用HSDPA的UE已知的。 为了减少发送附加控制信息所需的位数，连续分配与特定调制技术一起使用的HSDPA码。 对于每个调制技术，只有起始码和代码总数需要为UE所知。 可以允许每个调制技术使用的代码数量在几个TTI中改变一次。

公开(公告)号：US20060222124A1

公开(公告)日：2006-10-05

申请号：US11387152

申请日：2006-03-22

申请人： Byoung-Hoon Kim ,  Durga Malladi ,  Yongbin Wei

发明人： Byoung-Hoon Kim ,  Durga Malladi ,  Yongbin Wei

IPC分类号： H04B1/10

CPC分类号： H04L25/03038 ,  H04L25/03057 ,  H04L2025/03573

摘要： An equalization filter is provided with the ability to softly switch between pure linear equalization and decision feedback equalization. A reliability gain factor and an associated gain factor calculated by a predetermined mapping relation are provided in a decision feedback path and a feedforward path, respectively. Increasing the reliability gain factor increases the significance of the decision feedback filtering. Better performance than pure linear equalization and pure decision feedback equalization can be achieved.

摘要翻译： 均衡滤波器具有在纯线性均衡和判决反馈均衡之间软切换的能力。 分别在判定反馈路径和前馈路径中提供通过预定映射关系计算的可靠性增益因子和相关联的增益因子。 增加可靠性增益因子增加了决策反馈滤波的意义。 可以实现比纯线性均衡和纯决策反馈均衡更好的性能。

公开(公告)号：US20060221809A1

公开(公告)日：2006-10-05

申请号：US11388535

申请日：2006-03-24

申请人： Durga Malladi ,  Peter Gaal ,  Yongbin Wei

发明人： Durga Malladi ,  Peter Gaal ,  Yongbin Wei

IPC分类号： H04B7/216

CPC分类号： H04L25/03159 ,  H04B2201/70701 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/03012 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/261 ,  H04L2025/03414 ,  H04W48/08 ,  H04W52/58 ,  H04W72/00 ,  H04W74/04

摘要： Techniques for transmitting data in a manner to facilitate equalization at a receiver are described. Guard intervals are appended to data blocks such that each data block has a guard interval at the beginning of the data block and a guard interval at the end of the data block. Each guard interval may be discontinuous transmission (DTX), a polyphase sequence, or some other known sequence. Pilot is appended to each set of at least one data block. The data blocks, pilot, and guard intervals may be sent using various slot structures and are processed for transmission. The processing may include mapping the data blocks to at least one physical channel, channelizing the data blocks for each physical channel with a channelization code, combining all physical channels, and scrambling the combined data, pilot, and guard intervals with a scrambling code.

摘要翻译： 描述了以便于在接收机处均衡的方式发送数据的技术。 保护间隔被附加到数据块，使得每个数据块在数据块的开始处具有保护间隔，并且在数据块的末尾具有保护间隔。 每个保护间隔可以是不连续传输（DTX），多相序列或一些其他已知序列。 导频被附加到每组至少一个数据块。 数据块，导频和保护间隔可以使用各种时隙结构发送，并被处理以进行传输。 该处理可以包括将数据块映射到至少一个物理信道，通过信道化码信道化每个物理信道的数据块，组合所有物理信道，以及用加扰码对组合的数据，导频和保护间隔进行加扰。

公开(公告)号：US20050014470A1

公开(公告)日：2005-01-20

申请号：US10794917

申请日：2004-03-05

申请人： Durga Malladi

发明人： Durga Malladi

IPC分类号： H04W24/00 ,  H04B7/26 ,  H04Q7/20

CPC分类号： H04B17/336

摘要： A method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication system. A first signal is received over a first channel and a second signal is received over a second channel, where the second signal is received at a higher signal power level than said first signal. A signal-to-noise ratio (SNR) of the second signal is measured, and the SNR of the first signal is determined based at least in part upon the measured SNR of the second signal.

摘要翻译： 一种用于在无线通信系统中提供上行链路信噪比（SNR）估计的方法和装置。 在第一信道上接收第一信号，并且在第二信道上接收第二信号，其中以比所述第一信号更高的信号功率电平接收第二信号。 测量第二信号的信噪比（SNR），并且至少部分地基于第二信号的测量SNR来确定第一信号的SNR。