专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2008058112A3 MIMO TRANSMISSION WITH LAYER PERMUTATION IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：在无线通信系统中具有层传输的MIMO传输
公开(公告)号：WO2008058112A3
公开(公告)日：2008-12-11
申请号：PCT/US2007083739
申请日：2007-11-06
申请人： QUALCOMM INC , MALLADI DURGA PRASAD , KIM BYOUNG-HOON , YOO TAESANG
发明人： MALLADI DURGA PRASAD , KIM BYOUNG-HOON , YOO TAESANG
IPC分类号： H04B7/06 , H04B7/04 , H04L1/00 , H04L1/06
CPC分类号： H04B7/065 , H04B7/0417 , H04B7/0617 , H04B7/0628 , H04B7/0641 , H04L1/0026 , H04L1/0625 , H04L1/0656 , H04L1/1812
摘要： Techniques for supporting MIMO transmission with layer permutation are described. In one aspect, multiple codewords may be generated for transmission from multiple antennas (e.g., virtual antennas), with the number of codewords being less than the number of antennas. Each codeword may be mapped across the multiple antennas. Two codewords may be generated. For rank 3, the first codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennas on each subcarrier). For rank 4, each codeword may be mapped to two layers. In another aspect, a base CQI indicative of an average signal quality may be determined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed with different penalty factors for different ranks or number of codewords.
摘要翻译：描述了用于支持具有层置换的MIMO传输的技术。在一个方面，可以生成多个码字用于从多个天线（例如，虚拟天线）的发射，其中码字的数量小于天线的数量。每个码字可以跨多个天线映射。可以生成两个码字。对于秩3，第一码字可以映射到一个层（或每个子载波上的一个天线），并且第二码字可以映射到两个层（或每个子载波上的两个天线）。对于等级4，每个码字可以映射到两个层。另一方面，可以确定表示平均信号质量的基本CQI。也可以确定表示对平均信号质量的改善的增量CQI。在另一方面，可以针对不同等级或码字数量对不同的惩罚因素进行选择。

2. 发明申请

WO2008098092A2 CYCLIC DELAY DIVERSITY AND PRECODING FOR WIRELESS COMMUNICATION 审中-公开
标题翻译：循环延迟多样性和无线通信预测
公开(公告)号：WO2008098092A2
公开(公告)日：2008-08-14
申请号：PCT/US2008053232
申请日：2008-02-06
申请人： QUALCOMM INC , KIM BYOUNG-HOON , MALLADI DURGA PRASAD , ZHANG XIAOXIA , YOO TAESANG
发明人： KIM BYOUNG-HOON , MALLADI DURGA PRASAD , ZHANG XIAOXIA , YOO TAESANG
CPC分类号： H04B7/0671 , H04B7/0473 , H04L5/0023 , H04L25/03898 , H04L27/2646
摘要： Techniques for sending a MIMO transmission using a combination of cyclic delay diversity and precoding are described. A set of delays (e.g., zero delay, small delay, and large delay) for cyclic delay diversity and a set of precoding matrices may be supported. In one design, a Node B may select a delay specifically for a UE or for a set of UEs served by the Node B. In another design, a UE may evaluate different combinations of precoding matrix and delay, determine the combination with the best performance, and send this combination of precoding matrix and delay to the Node B. The Node B may perform precoding with the precoding matrix and then processing for cyclic delay diversity based on the selected delay. Alternatively, the Node B may perform processing for cyclic delay diversity based on the selected delay and then precoding with the precoding matrix.
摘要翻译：描述了使用循环延迟分集和预编码的组合来发送MIMO传输的技术。可以支持用于循环延迟分集和一组预编码矩阵的一组延迟（例如，零延迟，小延迟和大延迟）。在一种设计中，节点B可以针对UE或由节点B服务的一组UE选择延迟。在另一种设计中，UE可以评估预编码矩阵和延迟的不同组合，确定具有最佳性能的组合并将预编码矩阵和延迟的组合发送到节点B.节点B可以利用预编码矩阵执行预编码，然后基于所选择的延迟来执行循环延迟分集的处理。或者，节点B可以基于所选择的延迟执行循环延迟分集的处理，然后用预编码矩阵进行预编码。

3. 发明申请

WO2007112416A3 POWER CONTROL AND RESOURCE MANAGEMENT IN ORTHOGONAL WIRELESS SYSTEMS 审中-公开
标题翻译：正交无线系统中的功率控制和资源管理
公开(公告)号：WO2007112416A3
公开(公告)日：2007-11-22
申请号：PCT/US2007065293
申请日：2007-03-27
申请人： QUALCOMM INC , KIM BYOUNG-HOON , MALLADI DURGA PRASAD , ZHANG XINPING
发明人： KIM BYOUNG-HOON , MALLADI DURGA PRASAD , ZHANG XINPING
IPC分类号： H04B7/005 , H04W52/34 , H04W52/36
CPC分类号： H04W52/343 , H04W52/367
摘要： A method for controlling power in a wireless network is provided. The method includes determining a relative power parameter at a wireless device such as a mobile wireless terminal and receiving a load parameter at the wireless device, where the load parameter is associated with at least one other wireless cell. The method includes adjusting transmit power of the wireless device in view of the relative power parameter and the load parameter. In another embodiment, the transmit power can be controlled in view of an absolute power spectral density parameter.
摘要翻译：提供了一种用于控制无线网络中的功率的方法。该方法包括确定诸如移动无线终端的无线设备处的相对功率参数，并且在无线设备处接收负载参数，其中负载参数与至少一个其他无线小区相关联。该方法包括根据相对功率参数和负载参数调整无线设备的发射功率。在另一实施例中，可以根据绝对功率谱密度参数来控制发射功率。

4. 发明申请

WO2008024773A3 APPROACH TO A UNIFIED SU-MIMO/MU-MIMO OPERATION 审中-公开
标题翻译：统一的SU-MIMO / MU-MIMO操作的方法
公开(公告)号：WO2008024773A3
公开(公告)日：2010-06-24
申请号：PCT/US2007076420
申请日：2007-08-21
申请人： QUALCOMM INC , KIM BYOUNG-HOON , MALLADI DURGA
发明人： KIM BYOUNG-HOON , MALLADI DURGA
IPC分类号： H04B7/06
CPC分类号： H04B7/0686 , H04B7/0413 , H04B7/0465 , H04B7/063 , H04B7/0632 , H04B7/0634 , H04B7/0874 , H04B17/24 , H04B17/336 , H04W72/1231
摘要： What is disclosed is an apparatus and method to dynamically schedule user devices in a wireless communication system in single-user multiple-input multiple-output (SU-MIMO) or multiple-user multiple-input multiple-output (MU-MIMO) modes of operation. The dynamic scheduling employs an efficient differential reporting of channel state information that reduces uplink feedback overhead, whereby a base layer value of a channel quality indicator (CQI) is reported in conjunction with a CQI offset value. Antenna subset selection is also reported. The offset value reflects gains by detection with successive interference cancellation if multiple antennas are reported (rank > 1), while it reflects the actual offset between single-layer SU-MIMO CQI and MU-MIMO CQI if a single antenna is reported (rank = 1). Scheduled SU-MIMO mode of operation is optimized for a user reporting either a single antenna or multiple antennas, whereas MU-MIMO operation is optimized for a user reporting a single antenna, in terms of accuracy of data rate and constellation size restorable at a transmitter based on the reported channel quality indicator.
摘要翻译：公开的是在单用户多输入多输出（SU-MIMO）或多用户多输入多输出（MU-MIMO）模式中的无线通信系统中动态调度用户设备的装置和方法操作。动态调度使用减少上行链路反馈开销的信道状态信息的有效差分报告，由此结合CQI偏移值报告信道质量指示符（CQI）的基本层值。天线子集选择也被报道。如果报告多个天线（秩> 1），偏移值反映了通过连续干扰消除的检测的增益，而如果单个天线被报告（秩= 1），其反映单层SU-MIMO CQI与MU-MIMO CQI之间的实际偏移量， 1）。对于报告单个天线或多个天线的用户，调度的SU-MIMO操作模式被优化，而MU-MIMO操作针对报告单个天线的用户进行了优化，就数据速率的精度和发射机可恢复的星座大小而言根据报道的渠道质量指标。

5. 发明申请

WO2008098093A3 APPARATUS AND METHOD FOR MIMO TRANSMISSION WITH EXPLICIT AND IMPLICIT CYCLIC DELAYS 审中-公开
标题翻译：具有明确和隐含的循环延迟的MIMO传输的装置和方法
公开(公告)号：WO2008098093A3
公开(公告)日：2008-11-20
申请号：PCT/US2008053233
申请日：2008-02-06
申请人： QUALCOMM INC , KIM BYOUNG-HOON , MALLADI DURGA PRASAD , ZHANG XIAOXIA
发明人： KIM BYOUNG-HOON , MALLADI DURGA PRASAD , ZHANG XIAOXIA
IPC分类号： H04B7/06
CPC分类号： H04B7/0671 , H04B7/0417 , H04B7/0632 , H04B7/0647 , H04L5/0023 , H04L25/03898 , H04L27/2626
摘要： Techniques for transmitting data using a combination of explicit cyclic delay and implicit cyclic delay are described. A transmitter may perform fir=t processing for cyclic delay diversity (or explicit cyclic delay processing) based on a first set of cyclic delay values known to a receiver. The transmitter may perform precoding based on a precoding matrix either before or after the explicit cyclic delay processing. The transmitter may perform second processing for cyclic delay diversity (or implicit cyclic delay processing) based on a.second set of cyclic delay values unknown to the receiver. The transmitter may perform both explicit and implicit cyclic delay processing for data and may perform only implicit cyclic delay processing for pilot. One entity may. select the first set of cyclic delay values and inform the other entity. The transmitter may autonomously (e.g. pseudo-randomly) select the second set of cyclic delay, values without informing the receiver.
摘要翻译：描述了使用显式循环延迟和隐式循环延迟的组合来发送数据的技术。发射机可以基于接收机已知的第一组循环延迟值来执行用于循环延迟分集（或显式循环延迟处理）的fir = t处理。发射机可以在显式循环延迟处理之前或之后基于预编码矩阵执行预编码。发射机可以基于接收机未知的第二组循环延迟值来执行循环延迟分集（或隐式循环延迟处理）的第二处理。发射机可以对数据执行显式和隐式循环延迟处理，并且可以仅对导频执行隐式循环延迟处理。一个实体可以选择第一组循环延迟值并通知另一个实体。发射机可以自主地（例如伪随机地）选择第二组循环延迟值而不通知接收机。

6. 发明申请

WO2008008748A3 FREQUENCY HOPPING IN AN SC-FDMA ENVIRONMENT 审中-公开
标题翻译：频域在SC-FDMA环境中的选择
公开(公告)号：WO2008008748A3
公开(公告)日：2008-08-28
申请号：PCT/US2007073112
申请日：2007-07-10
申请人： QUALCOMM INC , MALLADI DURGA PRASAD , KIM BYOUNG-HOON
发明人： MALLADI DURGA PRASAD , KIM BYOUNG-HOON
IPC分类号： H04B7/26
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。

7. 发明申请

WO2008057898A3 METHOD AND APPARATUS FOR CELL SEARCH IN AN ORTHOGONAL WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：用于在正交无线通信系统中搜索的方法和装置
公开(公告)号：WO2008057898A3
公开(公告)日：2008-07-17
申请号：PCT/US2007083265
申请日：2007-10-31
申请人： QUALCOMM INC , MONTOJO JUAN , KIM BYOUNG-HOON , MALLADI DURGA PRASAD , LUO TAO
发明人： MONTOJO JUAN , KIM BYOUNG-HOON , MALLADI DURGA PRASAD , LUO TAO
IPC分类号： H04J11/00 , H04L27/00
CPC分类号： H04W48/16 , H04B2201/70701 , H04J11/0069 , H04L5/0023 , H04L5/0037 , H04L5/0048 , H04W48/08 , Y02B60/50 , Y02D70/00 , Y02D70/1222 , Y02D70/1262 , Y02D70/25
摘要： Systems and methodologies are described that provide techniques for efficient cell search in a wireless communication system. In one aspect, a frequency reuse pattern can be generated by applying frequency shifts to reference signals transmitted from cells that provide coverage for a NodeB based on cell IDs or cell group IDs for the cells. The frequency shifts applied to reference signals can then be utilized as a basis for multiplexing reference signals from different cells using frequency division multiplexing (FDM) or a combination of FDM and other multiplexing techniques. Other adjustments to reference signals transmitted from respective cells, such as transmit power adjustments, can further be made to improve detection performance.
摘要翻译：描述了提供用于无线通信系统中的有效小区搜索的技术的系统和方法。在一个方面，可以通过将频移应用于从为小区提供覆盖的小区发送的参考信号来产生频率重用模式，所述小区基于小区的小区ID或小区组ID。然后，施加到参考信号的频移可以用作使用频分复用（FDM）或FDM和其他复用技术的组合来复用来自不同小区的参考信号的基础。可以进一步对从各小区发送的参考信号进行调整，例如发射功率调整，以提高检测性能。

8. 发明申请

WO2008042904A3 UPLINK ACK TRANSMISSION FOR SDMA IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：在无线通信系统中用于SDMA的上行链路ACK传输
公开(公告)号：WO2008042904A3
公开(公告)日：2008-07-10
申请号：PCT/US2007080200
申请日：2007-10-02
申请人： QUALCOMM INC , MALLADI DURGA PRASAD , KIM BYOUNG-HOON
发明人： MALLADI DURGA PRASAD , KIM BYOUNG-HOON
IPC分类号： H04L1/16 , H04B7/04 , H04L5/02
CPC分类号： H04L1/1671 , H04L1/1664 , H04L5/023
摘要： Techniques for transmitting acknowledgement (ACK) information in a wireless communication system are described. The system supports data transmission to multiple user equipments (UEs) on the same downlink resources with spatial division multiple access (SDMA). A base station sends a data transmission with multiple (M) layers to M UEs. The downlink resources used for the data transmission are associated with ACK resources used to send ACK information for the data transmission. The ACK resources may be partitioned into M portions, e.g., based on frequency division multiplexing (FDM). Each of the M layers is associated with a respective portion of the ACK resources. A recipient UE for each layer sends ACK for that layer on the associated portion of the ACK resources. For each ACK resource portion, one or more pilot symbols may be sent on one or more resource elements, and ACK symbols may be sent on remaining resource elements.
摘要翻译：描述了用于在无线通信系统中发送确认（ACK）信息的技术。该系统支持在具有空分多址（SDMA）的相同下行链路资源上向多个用户设备（UE）的数据传输。基站向M个UE发送具有多个（M）层的数据传输。用于数据传输的下行链路资源与用于发送用于数据传输的ACK信息的ACK资源相关联。例如，基于频分复用（FDM），ACK资源可以被划分成M个部分。 M个层中的每一个与ACK资源的相应部分相关联。每个层的接收方UE在ACK资源的关联部分上发送针对该层的ACK。对于每个ACK资源部分，可以在一个或多个资源元素上发送一个或多个导频符号，并且可以在剩余的资源元素上发送ACK符号。

9. 发明申请

WO2007109679A3 UPLINK CHANNEL ESTIMATION USING A SIGNALING CHANNEL 审中-公开
标题翻译：使用信号通道的上行信道估计
公开(公告)号：WO2007109679A3
公开(公告)日：2007-12-21
申请号：PCT/US2007064426
申请日：2007-03-20
申请人： QUALCOMM INC , KIM BYOUNG-HOON , MALLADI DURGA PRASAD , XU HAO
发明人： KIM BYOUNG-HOON , MALLADI DURGA PRASAD , XU HAO
IPC分类号： H04L27/26 , H04B7/005
CPC分类号： H04L27/261 , H04B7/04 , H04L1/0002 , H04L1/0026 , H04L1/06 , H04L5/023 , H04L25/0224 , H04W52/16 , H04W52/325
摘要： Techniques for efficiently deriving uplink channel estimates without consuming much additional uplink resources are described. A user equipment (UE) may send a request for uplink resources on a request channel (REQCH) whenever the UE desires to transmit data on the uplink. The UE may send the REQCH on a set of subcarriers and from multiple antennas, e.g., send REQCH data on data subcarriers and pilot on pilot subcarriers. A Node B may receive the request, estimate the complex channel gains for the pilot subcarriers based on received pilot symbols, and coherently demodulate received data symbols based on the channel gain estimates. The Node B may estimate the complex channel gains for the data subcarriers based on demodulated data symbols and derive a channel estimate for each UE antenna based on the channel gain estimates for the pilot and data subcarriers. The Node B may use the channel estimates for MIMO scheduling, subband scheduling, and rate selection.
摘要翻译：描述了用于有效地导出上行链路信道估计而不耗费大量附加上行链路资源的技术。每当UE希望在上行链路上传输数据时，用户设备（UE）可以在请求信道（REQCH）上发送上行链路资源的请求。 UE可以在一组子载波上从多个天线发送REQCH，例如在数据子载波上发送REQCH数据，并在导频子载波上导频。节点B可以接收请求，基于接收到的导频符号来估计导频子载波的复信道增益，并且基于信道增益估计相干解调接收到的数据符号。节点B可以基于解调的数据符号来估计数据子载波的复信道增益，并且基于导频和数据子载波的信道增益估计导出每个UE天线的信道估计。节点B可以使用用于MIMO调度，子带调度和速率选择的信道估计。

10. 发明申请

WO2009023825A3 ANTENNA SWITCHING AND UPLINK SOUNDING CHANNEL MEASUREMENT 审中-公开
标题翻译：天线切换和上行链路通道测量
公开(公告)号：WO2009023825A3
公开(公告)日：2009-05-07
申请号：PCT/US2008073289
申请日：2008-08-15
申请人： QUALCOMM INC , KIM BYOUNG-HOON , MALLADI DURGA PRASAD , MONTOJO JUAN , SARKAR SANDIP
发明人： KIM BYOUNG-HOON , MALLADI DURGA PRASAD , MONTOJO JUAN , SARKAR SANDIP
IPC分类号： H04B7/06 , H04L1/06 , H04L25/02
CPC分类号： H04L25/0208 , H04B7/061 , H04L1/0026 , H04L1/0693 , H04L25/0224
摘要： Systems and methodologies are described that facilitate employing downlink precoding based on uplink sounding channel measurement and channel reciprocity in time division duplex or time division multiplex systems. In particular, mechanism are provided that enable downlink precoding in situations where user equipment antenna configuration includes an unequal number of transmit chains and receive chains. A mobile device transmits modulated sounding reference signals on each antenna during a calibration stage. The mobile device then transmits non-modulated sounding reference signals during a normal mode. A base station utilizes the modulated and non-modulated sounding reference signals to restore a downlink channel estimate employed in downlink precoding.
摘要翻译：描述了有助于在时分双工或时分复用系统中基于上行链路探测信道测量和信道互易性采用下行链路预编码的系统和方法。特别地，提供了在用户设备天线配置包括不等数量的发射链和接收链的情况下实现下行链路预编码的机制。移动设备在校准阶段期间在每个天线上发送调制的探测参考信号。移动设备然后在正常模式期间发送未调制的探测参考信号。基站利用调制和未调制的探测参考信号来恢复在下行链路预编码中采用的下行链路信道估计。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式