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

US20110317748A1 DEMODULATION REFERENCE SIGNAL BASED CHANNEL STATE INFORMATION FEEDBACK IN OFDM-MIMO SYSTEMS 审中-公开
标题翻译： OFDM-MIMO系统中的解调参考信号基信道反馈信息
公开(公告)号：US20110317748A1
公开(公告)日：2011-12-29
申请号：US13169529
申请日：2011-06-27
申请人： Yingxue K. Li , Hongsan Sheng , Guodong Zhang , Philip J. Pietraski
发明人： Yingxue K. Li , Hongsan Sheng , Guodong Zhang , Philip J. Pietraski
IPC分类号： H04B1/38
CPC分类号： H04L25/0226 , H04B7/0417 , H04B7/0626 , H04B7/0639 , H04L5/0007 , H04L5/0023 , H04L5/005 , H04L5/0091 , H04L25/0204 , H04L25/0224 , H04L25/03343 , H04L25/03891 , H04L65/4076
摘要： A method and apparatus for using demodulation reference signal (DM-RS) based channel state information (CSI) feedback in Orthogonal Frequency Division Multiplexing—multiple-input multiple-output (OFDM-MIMO) systems is disclosed. The wireless transmit/receive unit (WTRU) receives one or more resource blocks from a base station, wherein the resource blocks (RBs) include demodulating reference signals (DM-RS) and precoder information. The precoder information is sent unicast or broadcasted over a common control channel. The WTRU estimates an effective channel estimate based on the DM-RS, derives an unprecoded channel based on the effective channel and the precoder information, generates CSI feedback based on the unprecoded channel, and transmits the CSI feedback to the base station. Alternatively, the WTRU estimates an effective channel estimate based on the DM-RS, quantizes the effective channel estimate and transmits the CSI feedback to the base station.
摘要翻译：公开了一种在正交频分复用多输入多输出（OFDM-MIMO）系统中使用基于解调参考信号（DM-RS）的信道状态信息（CSI）反馈的方法和装置。无线发射/接收单元（WTRU）从基站接收一个或多个资源块，其中资源块（RB）包括解调参考信号（DM-RS）和预编码器信息。预编码器信息通过公共控制信道单播或广播发送。 WTRU基于DM-RS估计有效信道估计，基于有效信道和预编码器信息导出未重新编码的信道，基于未重新编码的信道生成CSI反馈，并将CSI反馈发送到基站。或者，WTRU基于DM-RS估计有效信道估计，量化有效信道估计并将CSI反馈发送到基站。

2. 发明申请

US20130343215A1 Systems and Methods for Improving Channel Quality Indication Feedback Accuracy In Wireless Communication 审中-公开
标题翻译：无线通信中提高信道质量指示反馈精度的系统和方法
公开(公告)号：US20130343215A1
公开(公告)日：2013-12-26
申请号：US13991118
申请日：2011-12-02
申请人： Yingxue K. Li , Philip J. Pietraski , Joseph S. Levy , Hongsan Sheng
发明人： Yingxue K. Li , Philip J. Pietraski , Joseph S. Levy , Hongsan Sheng
IPC分类号： H04W72/08
CPC分类号： H04W72/085 , H04B7/024 , H04B7/0417 , H04B7/0452 , H04B7/0632 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L2001/0093
摘要： Systems and methods for channel quality indicator (CQI) feedback may be disclosed. At a current transmission time interval, precoder and/or modulation information that may be used at or associated with a future transmission time interval may be determined. As such, at a current transmission time interval, precoder and/or modulation information that may be used to select a modulation or coding scheme (MCS) and/or schedule transmission at a future transmission time interval may be predicted in the current transmission time interval. The precoder and/or modulation information may be broadcast and received such that the information may be used to estimate a channel quality indicator (CQI) at the current transmission time interval. The estimated CQI may be used to select a modulation and coding scheme (MCS), schedule transmissions, and the like.
摘要翻译：可以公开用于信道质量指示符（CQI）反馈的系统和方法。在当前的传输时间间隔，可以确定可在未来传输时间间隔中或与之相关联的预编码器和/或调制信息。这样，在当前传输时间间隔，可以在当前传输时间间隔中预测可用于选择调制或编码方案（MCS）和/或调度传输的预编码器和/或调制信息。可以广播和接收预编码器和/或调制信息，使得可以使用该信息来估计当前传输时间间隔的信道质量指示符（CQI）。估计的CQI可以用于选择调制和编码方案（MCS），调度传输等。

3. 发明授权

US09438320B2 Iterative nonlinear precoding and feedback for multi-user multiple-input multiple-output (MU-MIMO) with channel state information (CSI) impairments 有权
标题翻译：具有信道状态信息（CSI）损伤的多用户多输入多输出（MU-MIMO）的迭代非线性预编码和反馈
公开(公告)号：US09438320B2
公开(公告)日：2016-09-06
申请号：US13820335
申请日：2011-09-01
申请人： Hongsan Sheng , Yingxue K. Li
发明人： Hongsan Sheng , Yingxue K. Li
IPC分类号： H04K1/02 , H04W4/00 , H04B7/04 , H04B7/06 , H04L1/00 , H04L25/03 , H04L25/497 , H04L5/00 , H04L25/02
CPC分类号： H04B7/0417 , H04B7/0452 , H04B7/0465 , H04B7/0478 , H04B7/0626 , H04B7/063 , H04B7/0632 , H04B7/0654 , H04B7/0663 , H04L1/0026 , H04L5/0007 , H04L25/0202 , H04L25/03343 , H04L25/4975 , H04L2025/03802
摘要： An iterative nonlinear preceding method based on, for example. Tomlinson-Harashima Preceding (THP) may be implemented in a MU-MIMO system to alleviate the performance degradation due to mismatches between actual Channel State Information (CSI) and impaired CSI available at a transmitter. In such a method, the effective channel may be fed back rather than a nonprecoded channel for a relay backhaul channel such that the iterative precoding and effective channel feedback may reduce the sensitivity to quantization errors and improve spectrum usage efficiency. Additionally, a Channel Quality Indicator (CQI) may be used to estimate a signal-to-interference-plus-noise (SINK) ratio based on quantization errors to accurately derive the effective channel quality of the receiver.
摘要翻译：例如，基于迭代非线性的前述方法。 Tomlinson-Harashima之前（THP）可以在MU-MIMO系统中实现，以减轻由于发射机可用的实际信道状态信息（CSI）与受损CSI之间的不匹配而引起的性能下降。在这种方法中，有效信道可以被反馈而不是用于中继回程信道的非重新编码信道，使得迭代预编码和有效信道反馈可以降低对量化误差的灵敏度并提高频谱使用效率。此外，可以使用信道质量指示符（CQI）来基于量化误差来估计信号与干扰加噪声（SINK）比，以精确地导出接收机的有效信道质量。

4. 发明申请

US20130223555A1 ITERATIVE NONLINEAR PRECODING AND FEEDBACK FOR MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (MU-MIMO) WITH CHANNEL STATE INFORMATION (CSI) IMPAIRMENTS 有权
标题翻译：用于具有通道状态信息（CSI）的多用户多输入多输出（MU-MIMO）的迭代非线性预测和反馈
公开(公告)号：US20130223555A1
公开(公告)日：2013-08-29
申请号：US13820335
申请日：2011-09-01
申请人： Hongsan Sheng , Yingxue K. Li
发明人： Hongsan Sheng , Yingxue K. Li
IPC分类号： H04B7/04
CPC分类号： H04B7/0417 , H04B7/0452 , H04B7/0465 , H04B7/0478 , H04B7/0626 , H04B7/063 , H04B7/0632 , H04B7/0654 , H04B7/0663 , H04L1/0026 , H04L5/0007 , H04L25/0202 , H04L25/03343 , H04L25/4975 , H04L2025/03802
摘要： An iterative nonlinear preceding method based on, for example. Tomlinson-Harashima Preceding (THP) may be implemented in a MU-MIMO system to alleviate the performance degradation due to mismatches between actual Channel State Information (CSI) and impaired CSI available at a transmitter. In such a method, the effective channel may be fed back rather than a nonprecoded channel for a relay backhaul channel such that the iterative precoding and effective channel feedback may reduce the sensitivity to quantization errors and improve spectrum usage efficiency. Additionally, a Channel Quality Indicator (CQI) may be used to estimate a signal-to-interference-plus-noise (SINK) ratio based on quantization errors to accurately derive the effective channel quality of the receiver.
摘要翻译：例如，基于迭代非线性的前述方法。 Tomlinson-Harashima之前（THP）可以在MU-MIMO系统中实现，以减轻由于发射机可用的实际信道状态信息（CSI）与受损CSI之间的不匹配而引起的性能下降。在这种方法中，有效信道可以被反馈而不是用于中继回程信道的非重新编码信道，使得迭代预编码和有效信道反馈可以降低对量化误差的灵敏度并提高频谱使用效率。此外，可以使用信道质量指示符（CQI）来基于量化误差来估计信号与干扰加噪声（SINK）比，以精确地导出接收机的有效信道质量。

5. 发明申请

US20130201912A1 METHOD AND APPARATUS FOR COMPRESSING CHANNEL STATE INFORMATION BASED ON PATH LOCATION INFORMATION 审中-公开
标题翻译：基于路径位置信息压缩信道状态信息的方法和装置
公开(公告)号：US20130201912A1
公开(公告)日：2013-08-08
申请号：US13698927
申请日：2011-05-18
申请人： Hongsan Sheng , Yingxue K. Li , Philip J. Pietraski , Carl Wang , Ron Porat
发明人： Hongsan Sheng , Yingxue K. Li , Philip J. Pietraski , Carl Wang , Ron Porat
IPC分类号： H04W28/20
CPC分类号： H04W28/20 , H04B7/0413 , H04B7/0626 , H04B7/0634 , H04B7/065 , H04B7/0663
摘要： Methods and apparatus are described for compressing channel state information (CSI) in time-domain based on path location information for CSI feedback. Downlink (DL) CSI is compressed in the time domain and fed back by not sending the multipath location information, or sending at a very low rate. In one method, a wireless transmit/receive unit (WTRU) selects the strongest multipath components based on channel characteristics. The multipath components are quantized in the time domain via direct or vector based quantization. The base station reconstructs a channel impulse response from the fed back quantized multipath components and applies same to precoding processing. In another method, the WTRU feeds back information associated with a narrowband portion(s) of a system spectrum. The selected narrowband portion(s) have sufficient density over time to allow good precoding per subband or across the system spectrum. Short term feedback may be augmented with long term channel information.
摘要翻译：描述了用于基于CSI反馈的路径位置信息在时域中压缩信道状态信息（CSI）的方法和装置。下行链路（DL）CSI在时域中被压缩，并且通过不发送多路径位置信息或以非常低的速率发送来反馈。在一种方法中，无线发射/接收单元（WTRU）基于信道特性选择最强的多径分量。多径分量通过直接或矢量量化在时域中量化。基站从反馈量化多路径分量重构信道脉冲响应，并将其应用于预编码处理。在另一种方法中，WTRU反馈与系统频谱的窄带部分相关联的信息。所选择的窄带部分随着时间具有足够的密度，以允许每个子带或跨系统频谱的良好预编码。短期反馈可能会增加长期渠道信息。

6. 发明申请

US20120275530A1 OPEN LOOP SPATIAL PROCESSING 有权
标题翻译：开环空间处理
公开(公告)号：US20120275530A1
公开(公告)日：2012-11-01
申请号：US13457145
申请日：2012-04-26
申请人： Shahrokh Nayeb Nazar , Robert L. Olesen , Manasa Raghavan , Muhammad U. Fazili , William E. Lawton , Yingxue K. Li
发明人： Shahrokh Nayeb Nazar , Robert L. Olesen , Manasa Raghavan , Muhammad U. Fazili , William E. Lawton , Yingxue K. Li
IPC分类号： H04L1/02
CPC分类号： H04B7/0456 , H04B7/022 , H04B7/0626 , H04L25/0206 , H04L25/03343 , H04L2025/03426
摘要： Methods and apparatus for multiple-input multiple-output (MIMO) transmissions are disclosed. A base station may precode wireless transmit/receive unit (WTRU)-specific reference signals and data that are transmitted to a WTRU using a randomly selected precoder. The precoder may be selected based on a predefined precoder selection sequence or by the base station. A different precoder may be applied to different resource blocks (RBs). In addition, a large delay cyclic delay diversity (CDD) or discrete Fourier transform (DFT) spreading may be applied on the WTRU-specific reference signals and the data. For heterogeneous deployed antennas, spatial diversity gain is achieved by dynamically scheduling resources between transmission points. A hopping scheme may be applied across the transmission points as the resources are dynamically partitioned between the transmission points. A different randomly selected precoder may be applied to each RB transmitted from a different transmission point.
摘要翻译：公开了用于多输入多输出（MIMO）传输的方法和装置。基站可以使用随机选择的预编码器对无线发射/接收单元（WTRU）特定的参考信号和数据进行预编码，所述参考信号和数据被发送到WTRU。可以基于预定义的预编码器选择序列或基站来选择预编码器。不同的预编码器可以应用于不同的资源块（RB）。此外，可以对WTRU特定的参考信号和数据应用大的延迟循环延迟分集（CDD）或离散傅立叶变换（DFT）扩展。对于异构部署的天线，通过在传输点之间动态调度资源来实现空间分集增益。当资源在传输点之间动态分配时，可以跨传输点应用跳频方案。可以将不同的随机选择的预编码器应用于从不同传输点发送的每个RB。

7. 发明授权

US09749992B2 Uplink feedback for multi-site scheduling 有权
公开(公告)号：US09749992B2
公开(公告)日：2017-08-29
申请号：US13566044
申请日：2012-08-03
申请人： Guodong Zhang , Paul Marinier , Yingxue K. Li , Stephen E. Terry , Diana Pani
发明人： Guodong Zhang , Paul Marinier , Yingxue K. Li , Stephen E. Terry , Diana Pani
IPC分类号： H04W72/04 , H04L1/16 , H04L1/18 , H04L5/00 , H04B7/022 , H04L1/00 , H04W28/06 , H04W72/12 , H04B7/06
CPC分类号： H04W72/04 , H04B7/022 , H04B7/0626 , H04L1/1607 , H04L1/1861 , H04L5/0055 , H04L2001/0092 , H04W28/06 , H04W72/12
摘要： Systems, methods, and instrumentalities are disclosed for a user equipment (UE) to provide feedback in a multi-site scheduling system (e.g., a system where multiple entities may schedule and/or send data to the UE). For example, the UE may receive a first data from a first network entity and a second data from a second network entity. A network entity may include entities that transmit data and/or control information to the UE, e.g., an eNodeB (eNB). The UE may generate feedback relating to received data, such as ACK/NACK information or channel state information (CSI). The UE may send a first feedback relating to the first data in a first subframe and a second feedback relating to the second data in a second subframe.

8. 发明申请

US20130201841A1 UPLINK FEEDBACK FOR MULTI-SITE SCHEDULING 有权
标题翻译：用于多站点调度的上行反馈
公开(公告)号：US20130201841A1
公开(公告)日：2013-08-08
申请号：US13566044
申请日：2012-08-03
申请人： Guodong Zhang , Paul Marinier , Yingxue K. Li , Stephen E. Terry , Diana Pani
发明人： Guodong Zhang , Paul Marinier , Yingxue K. Li , Stephen E. Terry , Diana Pani
IPC分类号： H04W72/04
CPC分类号： H04W72/04 , H04B7/022 , H04B7/0626 , H04L1/1607 , H04L1/1861 , H04L5/0055 , H04L2001/0092 , H04W28/06 , H04W72/12
摘要： Systems, methods, and instrumentalities are disclosed for a user equipment (UE) to provide feedback in a multi-site scheduling system (e.g., a system where multiple entities may schedule and/or send data to the UE). For example, the UE may receive a first data from a first network entity and a second data from a second network entity. A network entity may include entities that transmit data and/or control information to the UE, e.g., an eNodeB (eNB). The UE may generate feedback relating to received data, such as ACK/NACK information or channel state information (CSI). The UE may send a first feedback relating to the first data in a first subframe and a second feedback relating to the second data in a second subframe.
摘要翻译：公开了用于用户设备（UE）在多站点调度系统（例如，其中多个实体可以向UE调度和/或发送数据的系统）中提供反馈的系统，方法和工具。例如，UE可以从第一网络实体接收第一数据，并从第二网络实体接收第二数据。网络实体可以包括向UE（例如，eNodeB（eNB））发送数据和/或控制信息的实体。 UE可以产生与接收到的数据有关的反馈，例如ACK / NACK信息或信道状态信息（CSI）。 UE可以在第二子帧中发送与第一子帧中的第一数据有关的第一反馈和与第二数据有关的第二反馈。

9. 发明申请

US20110249656A1 Sending Feedback for Multiple Downlink Carriers 有权
标题翻译：发送多个下行链路载波的反馈
公开(公告)号：US20110249656A1
公开(公告)日：2011-10-13
申请号：US13026820
申请日：2011-02-14
申请人： Lujing Cai , Benoit Pelletier , Hong O. Zhang , Fengjun Xi , Yan Li , Yingxue K. Li , Christopher R. Cave
发明人： Lujing Cai , Benoit Pelletier , Hong O. Zhang , Fengjun Xi , Yan Li , Yingxue K. Li , Christopher R. Cave
IPC分类号： H04W4/00 , H04W72/04
CPC分类号： H04W72/04 , H04L1/0026 , H04L1/0028 , H04L1/0073 , H04L1/08 , H04L1/1671 , H04L1/1812 , H04L5/0053 , H04L2025/03808 , H04W52/325
摘要： Feedback information for multiple serving cells are transmitted on high speed dedicated physical control channel (HS-DPCCH). A slot format for transmitting feedback information is determined based on the number of configured secondary serving cells and whether multiple input multiple-output (MIMO) is configured in the serving cells. Spreading factor is reduced to 128 when two secondary serving cells are configured and MIMO is configured in at least one of the two configured secondary serving cells, or when three secondary serving cells are configured. The serving cells are grouped into feedback groups, each feedback group having one or more serving cells. Channel coding may be applied to feedback information for the feedback groups. The resulting encoded feedback information for the feedback groups is concatenated to form composite feedback information.
摘要翻译：用于多个服务小区的反馈信息在高速专用物理控制信道（HS-DPCCH）上发送。用于发送反馈信息的时隙格式基于所配置的辅助服务小区的数量确定，并且是否在服务小区中配置多输入多输出（MIMO）。当配置两个辅助服务小区并且在两个配置的辅助服务小区中的至少一个中配置MIMO时，或者当配置三个辅助服务小区时，扩频因子减少到128。服务小区被分组成反馈组，每个反馈组具有一个或多个服务小区。信道编码可以应用于反馈组的反馈信息。所产生的用于反馈组的编码的反馈信息被级联以形成复合反馈信息。

10. 发明授权

US09331757B2 Open loop spatial processing 有权
标题翻译：开环空间处理
公开(公告)号：US09331757B2
公开(公告)日：2016-05-03
申请号：US13457145
申请日：2012-04-26
申请人： Shahrokh Nayeb Nazar , Robert L. Olesen , Manasa Raghavan , Muhammad U. Fazili , William E. Lawton , Yingxue K. Li
发明人： Shahrokh Nayeb Nazar , Robert L. Olesen , Manasa Raghavan , Muhammad U. Fazili , William E. Lawton , Yingxue K. Li
IPC分类号： H04B7/02 , H04B7/04 , H04L25/02 , H04L25/03
CPC分类号： H04B7/0456 , H04B7/022 , H04B7/0626 , H04L25/0206 , H04L25/03343 , H04L2025/03426
摘要： Methods and apparatus for multiple-input multiple-output (MIMO) transmissions are disclosed. A base station may precode wireless transmit/receive unit (WTRU)-specific reference signals and data that are transmitted to a WTRU using a randomly selected precoder. The precoder may be selected based on a predefined precoder selection sequence or by the base station. A different precoder may be applied to different resource blocks (RBs). In addition, a large delay cyclic delay diversity (CDD) or discrete Fourier transform (DFT) spreading may be applied on the WTRU-specific reference signals and the data. For heterogeneous deployed antennas, spatial diversity gain is achieved by dynamically scheduling resources between transmission points. A hopping scheme may be applied across the transmission points as the resources are dynamically partitioned between the transmission points. A different randomly selected precoder may be applied to each RB transmitted from a different transmission point.
摘要翻译：公开了用于多输入多输出（MIMO）传输的方法和装置。基站可以使用随机选择的预编码器对无线发射/接收单元（WTRU）特定的参考信号和数据进行预编码，所述参考信号和数据被发送到WTRU。可以基于预定义的预编码器选择序列或基站来选择预编码器。不同的预编码器可以应用于不同的资源块（RB）。此外，可以对WTRU特定的参考信号和数据应用大的延迟循环延迟分集（CDD）或离散傅立叶变换（DFT）扩展。对于异构部署的天线，通过在传输点之间动态调度资源来实现空间分集增益。当资源在传输点之间动态分配时，可以跨传输点应用跳频方案。可以将不同的随机选择的预编码器应用于从不同传输点发送的每个RB。

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