公开(公告)号：US08718194B2

公开(公告)日：2014-05-06

申请号：US12955802

申请日：2010-11-29

申请人： Dung Ngoc Doan ,  Tao Luo ,  Taesang Yoo ,  Yongbin Wei ,  Xiaoxia Zhang

发明人： Dung Ngoc Doan ,  Tao Luo ,  Taesang Yoo ,  Yongbin Wei ,  Xiaoxia Zhang

IPC分类号： H03K9/00

CPC分类号： H04L25/0232 ,  H04L5/005 ,  H04L5/0051 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0242 ,  H04L25/0256

摘要： Aspects of the present disclosure describe an efficient channel estimation algorithm for high-speed processing of dedicated reference signals. The channel estimation algorithm may utilize one or more compressed interpolation matrices. The compressed interpolation matrices may be selected based on the Doppler value and signal to noise ratio (SNR) of the channel.

摘要翻译： 本公开的方面描述了用于专用参考信号的高速处理的有效的信道估计算法。 信道估计算法可以利用一个或多个压缩插值矩阵。 可以基于信道的多普勒值和信噪比（SNR）来选择压缩内插矩阵。

公开(公告)号：US20110129009A1

公开(公告)日：2011-06-02

申请号：US12955802

申请日：2010-11-29

申请人： Dung Ngoc Doan ,  Tao Luo ,  Taesang Yoo ,  Yongbin Wei ,  Xiaoxia Zhang

发明人： Dung Ngoc Doan ,  Tao Luo ,  Taesang Yoo ,  Yongbin Wei ,  Xiaoxia Zhang

IPC分类号： H04B1/10 ,  H04B17/00

CPC分类号： H04L25/0232 ,  H04L5/005 ,  H04L5/0051 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0242 ,  H04L25/0256

摘要： Aspects of the present disclosure describe an efficient channel estimation algorithm for high-speed processing of dedicated reference signals. The channel estimation algorithm may utilize one or more compressed interpolation matrices. The compressed interpolation matrices may be selected based on the Doppler value and signal to noise ratio (SNR) of the channel.

摘要翻译： 本公开的方面描述了用于专用参考信号的高速处理的有效的信道估计算法。 信道估计算法可以利用一个或多个压缩插值矩阵。 可以基于信道的多普勒值和信噪比（SNR）来选择压缩内插矩阵。

公开(公告)号：US08576692B2

公开(公告)日：2013-11-05

申请号：US12878983

申请日：2010-09-09

申请人： Xiaoxia Zhang ,  Yongbin Wei ,  Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo

发明人： Xiaoxia Zhang ,  Yongbin Wei ,  Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo

IPC分类号： H04J11/00

CPC分类号： H04L5/0051 ,  H04L5/0032 ,  H04L5/0037

摘要： Techniques for transmitting UE-specific reference signals (UE-RSs) in a wireless network are described. In an aspect, a UE-RS may be transmitted in different manners depending on the number of layers used for data transmission. In one design, a cell may determine subcarriers for a UE-RS based on a frequency shift if data is transmitted on one layer and based on a predetermined set of subcarriers (with no frequency shift) if data is transmitted on multiple layers. In another aspect, a UE-RS may be transmitted on subcarriers determined based on a frequency shift for data transmission on multiple layers. In yet another aspect, a UE-RS may be transmitted from a plurality of cells to a UE for coordinated multi-point (CoMP). In yet another aspect, a UE-RS may be transmitted in a data section of a subframe including only the data section.

摘要翻译： 描述了用于在无线网络中传送UE专用参考信号（UE-RS）的技术。 在一方面，可以根据用于数据传输的层数以不同的方式发送UE-RS。 在一种设计中，如果在多层上传输数据，则基于如果在一层上传送数据并且基于预定的一组子载波（无频移），则小区可以基于频移来确定UE-RS的子载波。 在另一方面，可以在基于用于多层数据传输的频移确定的子载波上发送UE-RS。 在另一方面，UE-RS可以从多个小区发送到用于协调多点（CoMP）的UE。 在另一方面，可以在仅包括数据部分的子帧的数据部分中发送UE-RS。

公开(公告)号：US20110216842A1

公开(公告)日：2011-09-08

申请号：US12878983

申请日：2010-09-09

申请人： Xiaoxia Zhang ,  Yongbin Wei ,  Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo

发明人： Xiaoxia Zhang ,  Yongbin Wei ,  Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo

IPC分类号： H04L27/28

CPC分类号： H04L5/0051 ,  H04L5/0032 ,  H04L5/0037

摘要： Techniques for transmitting UE-specific reference signals (UE-RSs) in a wireless network are described. In an aspect, a UE-RS may be transmitted in different manners depending on the number of layers used for data transmission. In one design, a cell may determine subcarriers for a UE-RS based on a frequency shift if data is transmitted on one layer and based on a predetermined set of subcarriers (with no frequency shift) if data is transmitted on multiple layers. In another aspect, a UE-RS may be transmitted on subcarriers determined based on a frequency shift for data transmission on multiple layers. In yet another aspect, a UE-RS may be transmitted from a plurality of cells to a UE for coordinated multi-point (CoMP). In yet another aspect, a UE-RS may be transmitted in a data section of a subframe including only the data section.

摘要翻译： 描述了用于在无线网络中传送UE专用参考信号（UE-RS）的技术。 在一方面，可以根据用于数据传输的层数以不同的方式来发送UE-RS。 在一种设计中，如果在多层上传输数据，则基于如果在一层上传送数据并且基于预定的一组子载波（无频移），则小区可以基于频移来确定UE-RS的子载波。 在另一方面，可以在基于用于多层数据传输的频移确定的子载波上发送UE-RS。 在另一方面，UE-RS可以从多个小区发送到用于协调多点（CoMP）的UE。 在另一方面，可以在仅包括数据部分的子帧的数据部分中发送UE-RS。

公开(公告)号：US20110286376A1

公开(公告)日：2011-11-24

申请号：US12949020

申请日：2010-11-18

申请人： Taesang Yoo ,  Tao Luo ,  Xiaoxia Zhang ,  Ke Liu

发明人： Taesang Yoo ,  Tao Luo ,  Xiaoxia Zhang ,  Ke Liu

IPC分类号： H04W56/00 ,  H04W4/08

CPC分类号： H04W24/00 ,  H04W56/00 ,  H04W56/0015 ,  H04W56/0035

摘要： A method, an apparatus, and a computer program product for wireless communication are provided in which a system timing is estimated, derived from timing of one or more cells, a timing offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the timing offsets. In addition, a method, an apparatus, and a computer program product for wireless communication are provided in which a carrier frequency is estimated, derived from a frequency of one or more cells, a frequency offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the frequency offsets.

摘要翻译： 提供了一种用于无线通信的方法，装置和计算机程序产品，其中从一个或多个单元的定时导出系统定时，相对于估计的系统定时为多个单元确定定时偏移， 并且使用定时偏移来处理从多个单元接收的信号。 此外，提供了一种用于无线通信的方法，装置和计算机程序产品，其中从一个或多个单元的频率导出载波频率，相对于多个单元确定频率偏移 使用频率偏移来处理估计的系统定时和从多个小区接收的信号。

公开(公告)号：US20110261673A1

公开(公告)日：2011-10-27

申请号：US13094669

申请日：2011-04-26

申请人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Ke Liu

发明人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Ke Liu

IPC分类号： H04W72/04 ,  H04W24/00

CPC分类号： H04J11/0053 ,  H04B7/0473 ,  H04J11/0033

摘要： In one aspect, a method to enhance coverage in a heterogeneous wireless network wireless communication is disclosed. The method includes generating a reference signal indicating a plurality of transmit antenna ports and generating modulation symbols. Modulation symbols are assigned to each of the plurality of transmit antenna ports, in accordance with a spatial diversity coding scheme for the plurality of transmit antenna ports. At least one of the modulation symbols assigned to at least one of the plurality of transmit antenna ports is muted prior to transmission in accordance with the spatial diversity coding scheme. The non-muted modulation symbols and the reference signal are transmitted on the other of the plurality of transmit antenna ports.

摘要翻译： 一方面，公开了一种在异构无线网络无线通信中增强覆盖的方法。 该方法包括产生指示多个发射天线端口并产生调制符号的参考信号。 根据用于多个发射天线端口的空间分集编码方案，将调制符号分配给多个发射天线端口中的每一个。 根据空间分集编码方案，分配给多个发送天线端口中的至少一个的调制符号中的至少一个在发送之前被静音。 在多个发送天线端口中的另一个发送非静噪调制符号和参考信号。

公开(公告)号：US10111111B2

公开(公告)日：2018-10-23

申请号：US12949020

申请日：2010-11-18

申请人： Taesang Yoo ,  Tao Luo ,  Xiaoxia Zhang ,  Ke Liu

发明人： Taesang Yoo ,  Tao Luo ,  Xiaoxia Zhang ,  Ke Liu

IPC分类号： H04W24/00 ,  H04W56/00

摘要： A method, an apparatus, and a computer program product for wireless communication are provided in which a system timing is estimated, derived from timing of one or more cells, a timing offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the timing offsets. In addition, a method, an apparatus, and a computer program product for wireless communication are provided in which a carrier frequency is estimated, derived from a frequency of one or more cells, a frequency offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the frequency offsets.

公开(公告)号：US09143955B2

公开(公告)日：2015-09-22

申请号：US13101877

申请日：2011-05-05

申请人： Xiaoxia Zhang ,  Ke Liu ,  Kapil Bhattad ,  Taesang Yoo ,  Tao Luo

发明人： Xiaoxia Zhang ,  Ke Liu ,  Kapil Bhattad ,  Taesang Yoo ,  Tao Luo

IPC分类号： H04W4/00 ,  H04W24/02 ,  H04W48/08 ,  H04W16/14

CPC分类号： H04W24/02 ,  H04W16/14 ,  H04W48/08

摘要： Physical-Layer Cell Identifier (PCID) collisions may occur in a wireless network when two neighboring evolved Node Bs (eNBs) having different Global Cell Identifiers (GCID) select identical PCIDs. Evolved Node Bs may uniquely identify themselves by transmitting on a broadcast channel, such as a Physical Broadcast Channel (PBCH), a pattern of bits corresponding to the eNB's GCID. Individual User Equipments (UEs) may recognize the PCID collision by decoding the PBCH payload to identify different GCID-modulated payloads from two eNBs involved in the PCID collision. Alternatively, UEs may detect PCID collisions in the wireless network by monitoring Primary Synchronization Signals (PSS) and Secondary Synchronization Signals (SSS) on the PBCH for identical signals separated by a relatively large time offset. After detecting a PCID collision, the UEs may attempt by best effort to report the PCID collision, may report to a fallback eNB, or the UEs may use special resources on an uplink channel.

摘要翻译： 当具有不同的全局小区标识符（GCID）的两个相邻演进节点B（eNB）选择相同的PCID时，物理层小区标识符（PCID）冲突可能发生在无线网络中。 演进节点B可以通过在诸如物理广播信道（PBCH）的广播信道上发送与eNB的GCID相对应的比特模式来唯一地标识自身。 个体用户设备（UE）可以通过解码PBCH净荷来识别PCID冲突，从而识别来自涉及PCID冲突的两个eNB的不同GCID调制的有效载荷。 或者，UE可以通过监视PBCH上的主同步信号（PSS）和次同步信号（SSS）来检测无线网络中的PCID冲突，用相对较大的时间偏移分开的相同信号。 在检测到PCID冲突之后，UE可以尽最大努力报告PCID冲突，可以向后退eNB报告，或者UE可以在上行链路信道上使用特殊资源。

公开(公告)号：US08768359B2

公开(公告)日：2014-07-01

申请号：US13212812

申请日：2011-08-18

申请人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

发明人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

IPC分类号： H04W36/00 ,  H04B7/00

CPC分类号： H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

摘要： Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell.

摘要翻译： 描述了用于选择二次同步信号（SSS）检测的样本的方法和装置。 提供了多种替代方案用于高效的小区标识符检测。 在第一替代方案中，从采样间隔之间以不均匀的间隔对从小区接收的信号的多个突发进行采样，以确定用于小区识别的序列。 在第二替代方案中，从较强小区接收到的第一和第二信号的样本被取消，并且用于检测较弱小区的序列是通过减少从不重叠的较弱小区接收的第三信号的样本的影响来确定的 具有较强小区的主同步信号（PSS）或SSS。 在第三替代方案中，用于检测较弱小区的序列通过减少对应于来自较强小区的信号的高发射功率部分的任何采样突发的影响来确定。

公开(公告)号：US20120046056A1

公开(公告)日：2012-02-23

申请号：US13212812

申请日：2011-08-18

申请人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

发明人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

IPC分类号： H04B7/24

CPC分类号： H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

摘要： Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell.

摘要翻译： 描述了用于选择二次同步信号（SSS）检测的样本的方法和装置。 提供了多种替代方案用于高效的小区标识符检测。 在第一替代方案中，从采样间隔之间以不均匀的间隔对从小区接收的信号的多个突发进行采样，以确定用于小区识别的序列。 在第二替代方案中，从较强小区接收到的第一和第二信号的样本被取消，并且用于检测较弱小区的序列是通过减少从不重叠的较弱小区接收的第三信号的样本的影响来确定的 具有较强小区的主同步信号（PSS）或SSS。 在第三替代方案中，用于检测较弱小区的序列通过减少对应于来自较强小区的信号的高发射功率部分的任何采样突发的影响来确定。