公开(公告)号：US07844008B2

公开(公告)日：2010-11-30

申请号：US11706821

申请日：2007-02-12

申请人： Wei Li ,  Haifeng Wang ,  Jorma Lilleberg ,  Ming Chen ,  Shixin Cheng

发明人： Wei Li ,  Haifeng Wang ,  Jorma Lilleberg ,  Ming Chen ,  Shixin Cheng

IPC分类号： H04L5/12 ,  H04L23/02

CPC分类号： H04L25/03216 ,  H04L2025/03426

摘要： A QRD-M decomposition includes a first and a sequential second stage, at least. In the first stage, M branches are selected from among more than M branches entering the first stage as survive branches from which multiple decompositions are calculated. In the second stage, more than M branches are selected from among those branches entering the second stage as survive branches from which multiple decompositions are calculated. The symbol of the received signal is decided from a branch that is a survive branch of both the first and second stages. The second stage may be within a window that may include additional stages at which the pruning decision down to M survive branches is delayed. One or more windows may be used in a single QRD-M decomposition. In an embodiment, all branches entering the second stage are survive branches. It is shown that the marginal increased computational load increases accuracy.

摘要翻译： QRD-M分解至少包括第一和第二阶段。 在第一阶段，从分支进入第一阶段的M个分支中选出M个分支作为计算多个分解的生存分支。 在第二阶段，从进入第二阶段的那些分支中选出超过M个分支作为计算多重分解的生存分支。 接收信号的符号由作为第一和第二级的存活分支的分支决定。 第二阶段可能在一个窗口内，可能包括另外一个阶段，在此阶段，由M延续出来的剪枝决定被延迟。 单个QRD-M分解中可以使用一个或多个窗口。 在一个实施例中，进入第二阶段的所有分支都是能够分支的。 显示边际增加的计算负载提高了精度。

公开(公告)号：US20080187066A1

公开(公告)日：2008-08-07

申请号：US11826360

申请日：2007-07-13

申请人： Haifeng Wang ,  Jorma Lilleberg ,  Wei Li ,  Ming Chen ,  Shixin Cheng

发明人： Haifeng Wang ,  Jorma Lilleberg ,  Wei Li ,  Ming Chen ,  Shixin Cheng

IPC分类号： H04L1/02

CPC分类号： H04L1/0656 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L5/0046 ,  H04L25/0246 ,  H04L25/03216 ,  H04L2025/03414 ,  H04L2025/03426

摘要： In a multiple-input multiple output (MIMO) system, high-rate data transmission is achieved by dividing the original data stream into several parallel data substreams, each of which is transmitted from a corresponding transmit antenna (spatial multiplexing) and received by multiple receive antennas. The number of spatial streams depends on the number of antennas. In a receiver, a search-tree based QR Decomposition-M (QRD-M) algorithm is used. According to the invention, multiple spatial signal streams received from a MIMO channel are pre-ordered based on modulation alphabets of said received spatial signal streams prior to performing a QRD-M detection.

摘要翻译： 在多输入多输出（MIMO）系统中，通过将原始数据流划分成若干并行数据子流实现高速率数据传输，每个子流从相应的发射天线（空间复用）发送并通过多个接收 天线。 空间流的数量取决于天线的数量。 在接收机中，使用基于搜索树的QR分解-M（QRD-M）算法。 根据本发明，在执行QRD-M检测之前，从MIMO信道接收的多个空间信号流是基于所接收的空间信号流的调制字母预先排序的。

公开(公告)号：US20060159187A1

公开(公告)日：2006-07-20

申请号：US11036588

申请日：2005-01-14

申请人： Haifeng Wang ,  Wei Li ,  Ming Chen ,  Shixin Cheng

发明人： Haifeng Wang ,  Wei Li ,  Ming Chen ,  Shixin Cheng

IPC分类号： H04K1/10 ,  H04B1/10

CPC分类号： H04L27/2605 ,  H04L25/0212 ,  H04L2025/03414 ,  H04L2025/03522

摘要： A system and method for a transceiver structure, where Different Known Guard Intervals (DKGI) are appended to multiple, consecutive data blocks and are then used in combination with Channel State Information (CSI) to restore cyclic convolution in the time domain. Once restored, the CSI and cyclic convolution are transformed into the frequency domain by FFT processing to facilitate equalization of the channel through Frequency Domain Equalization (FDE). Through performance of time domain channel estimation, there is no need for pilot signals and related overhead, thus channel capacity is enhanced.

摘要翻译： 用于收发器结构的系统和方法，其中将不同的已知保护间隔（DKGI）附加到多个连续数据块，然后与信道状态信息（CSI）结合使用以在时域中恢复循环卷积。 一旦恢复，CSI和循环卷积通过FFT处理转换成频域，以促进通过频域均衡（FDE）的信道的均衡。 通过执行时域信道估计，不需要导频信号和相关开销，从而增强了信道容量。

公开(公告)号：US20080107203A1

公开(公告)日：2008-05-08

申请号：US11873912

申请日：2007-10-17

申请人： Haifeng Wang ,  Wei Li ,  Ming Chen ,  Shixin Cheng

发明人： Haifeng Wang ,  Wei Li ,  Ming Chen ,  Shixin Cheng

IPC分类号： H04L27/00

CPC分类号： H04L5/0048 ,  H04B1/707 ,  H04B2201/70701 ,  H04L5/0007 ,  H04L5/0064 ,  H04L25/0226 ,  H04L27/2613

摘要： A method for providing a plurality of user equipment with a pilot sequence, the plurality of user equipment being allocated a bandwidth, the method including scattering the pilot sequence over the bandwidth orthogonally in the frequency domain among the plurality of user equipment.

摘要翻译： 一种用于向多个用户设备提供导频序列的方法，所述多个用户设备被分配带宽，所述方法包括在所述多个用户设备中在所述频域中正交地在所述带宽上散布所述导频序列。

公开(公告)号：US20080162902A1

公开(公告)日：2008-07-03

申请号：US11706821

申请日：2007-02-12

申请人： Wei Li ,  Haifeng Wang ,  Jorma Lilleberg ,  Ming Chen ,  Shixin Cheng

发明人： Wei Li ,  Haifeng Wang ,  Jorma Lilleberg ,  Ming Chen ,  Shixin Cheng

IPC分类号： G06F9/00

CPC分类号： H04L25/03216 ,  H04L2025/03426

摘要： A QRD-M decomposition includes a first and a sequential second stage, at least. In the first stage, M branches are selected from among more than M branches entering the first stage as survive branches from which multiple decompositions are calculated. In the second stage, more than M branches are selected from among those branches entering the second stage as survive branches from which multiple decompositions are calculated. The symbol of the received signal is decided from a branch that is a survive branch of both the first and second stages. The second stage may be within a window that may include additional stages at which the pruning decision down to M survive branches is delayed. One or more windows may be used in a single QRD-M decomposition. In an embodiment, all branches entering the second stage are survive branches. It is shown that the marginal increased computational load increases accuracy.

摘要翻译： QRD-M分解至少包括第一和第二阶段。 在第一阶段，从分支进入第一阶段的M个分支中选出M个分支作为计算多个分解的生存分支。 在第二阶段，从进入第二阶段的那些分支中选出超过M个分支作为计算多重分解的生存分支。 接收信号的符号由作为第一和第二级的存活分支的分支决定。 第二阶段可能在一个窗口内，可能包括另外一个阶段，在此阶段，由M延续出来的剪枝决定被延迟。 单个QRD-M分解中可以使用一个或多个窗口。 在一个实施例中，进入第二阶段的所有分支都是能够分支的。 显示边际增加的计算负载提高了精度。

公开(公告)号：US20080101451A1

公开(公告)日：2008-05-01

申请号：US11733503

申请日：2007-04-10

申请人： Haifeng Wang ,  Jorma Lilleberg ,  Wei Li ,  Ming Chen ,  Shixin Cheng

发明人： Haifeng Wang ,  Jorma Lilleberg ,  Wei Li ,  Ming Chen ,  Shixin Cheng

IPC分类号： H03K5/159

CPC分类号： H04L25/03159 ,  H04L5/0007 ,  H04L25/0212 ,  H04L25/0232 ,  H04L27/2647 ,  H04L2025/03414

摘要： An approach is provided for subblock-wise frequency domain equalization, wherein a data block of a received signal is segmented into at least two subblocks at a receiving end of a transmission channel. The subblocks are then equalized separately in the frequency domain, and equalized subblocks are combined to obtain an equalized signal. Thereby, Doppler induced interference can be suppressed to achieve enhanced robustness to high Doppler and compensate performance degradation due to rapidly varying channels.

摘要翻译： 提供了一种用于子块频域均衡的方法，其中接收信号的数据块在传输信道的接收端被分段成至少两个子块。 然后在频域中分别对子块进行均衡，并且组合均衡的子块以获得均衡的信号。 因此，可以抑制多普勒感应干扰以实现对高多普勒的增强的鲁棒性并且补偿由于快速变化的信道而导致的性能下降。

公开(公告)号：US20070258352A1

公开(公告)日：2007-11-08

申请号：US11415725

申请日：2006-05-02

申请人： Haifeng Wang ,  Fang Wang ,  Ming Chen ,  Shixin Cheng

发明人： Haifeng Wang ,  Fang Wang ,  Ming Chen ,  Shixin Cheng

IPC分类号： H04J11/00

CPC分类号： H04W52/42 ,  H04L1/0045 ,  H04L1/0057 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/006

摘要： A multicarrier data transmission scheme is provided. According to the provided scheme, a radio transmitter encodes data bits with different degrees, the degree of an encoded data bit being defined by the number of parity check equations protecting the data bit. The data bits are preferably encoded with an irregular low-density parity check (LDPC) code. The encoded data bits are then mapped to symbols. The symbols are allocated to subcarriers of a multicarrier radio signal on the basis of channel state information obtained from the radio receiver and the degree used with respect to each symbol. On the basis of the channel state information, a number of subcarriers are truncated due to high attenuation, and the number of subcarriers to be truncated relative to the total number of subcarriers is substantially fixed. The available transmit power to the non-truncated subcarriers. The multicarrier signal comprising symbols on the non-truncated subcarriers is then transmitted to the radio receiver.

摘要翻译： 提供了一种多载波数据传输方案。 根据所提供的方案，无线电发射机对不同程度的数据比特进行编码，编码数据比特的程度由保护数据比特的奇偶校验方程数定义。 数据比特优选地用不规则的低密度奇偶校验（LDPC）码进行编码。 编码数据位然后映射到符号。 基于从无线电接收机获得的信道状态信息和相对于每个符号使用的程度，将符号分配给多载波无线电信号的子载波。 基于信道状态信息，由于高衰减而使多个子载波被截断，并且相对于子载波的总数而要被截断的子载波的数量基本上是固定的。 对非截断子载波的可用传输功率。 然后，将包括非截断子载波上的符号的多载波信号发送到无线电接收机。

公开(公告)号：US20080008231A1

公开(公告)日：2008-01-10

申请号：US11738908

申请日：2007-04-23

申请人： Haifeng Wang ,  Fang Wang ,  Ming Chen ,  Shixin Cheng

发明人： Haifeng Wang ,  Fang Wang ,  Ming Chen ,  Shixin Cheng

IPC分类号： H04L27/28 ,  H04B1/38 ,  H04L5/16 ,  H04K1/10

CPC分类号： H04L1/0026 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0656 ,  H04L27/2626

摘要： A method of transmitting data in a communications system comprising a first station and a second station. The method for transmitting data in a communications system comprises encoding data; allocating the encoded data to different quality channels based on how data is encoded; and transmitting the encoded data on the allocated channels from the first station to the second station.

摘要翻译： 一种在包括第一站和第二站的通信系统中发送数据的方法。 在通信系统中发送数据的方法包括编码数据; 基于数据的编码方式将编码数据分配到不同的质量信道; 以及将所分配的信道上的编码数据从第一站传送到第二站。

公开(公告)号：US20070291860A1

公开(公告)日：2007-12-20

申请号：US11664446

申请日：2004-10-28

申请人： Haifeng Wang ,  Bingyang Wu ,  Ming Chen ,  Shixin Cheng

发明人： Haifeng Wang ,  Bingyang Wu ,  Ming Chen ,  Shixin Cheng

IPC分类号： H04L27/28

CPC分类号： H04L27/2621 ,  H04L1/0071 ,  H04L27/2614

摘要： This invention relates to a method, device, computer program and computer program product for determining a mapping for a sequence of information-carrying values, including determining K representations of a sequence of information-carrying values in K successive stages, respectively, wherein in a first stage, a first representation of said K representations is determined to be equal to said sequence of information-carrying values, wherein in subsequent stages, each representation is determined by performing a mapping operation on the representation determined in the preceding stage, and wherein said mapping operation is the same for each stage; calculating, in each stage, a parameter from a transformation of the representation determined in said stage; and determining for which stage of said K stages an extreme value of said parameter is calculated. The invention further relates to a method, device, computer program and computer program product for inverse-mapping a mapped sequence of information-carrying values, and a system for the transfer of information-carrying values.

摘要翻译： 本发明涉及一种用于确定信息载入值序列的映射的方法，装置，计算机程序和计算机程序产品，包括分别确定K个连续阶段中的信息携带值序列的K个表示，其中在 所述K表示的第一表示被确定为等于所述信息携带值的序列，其中在随后的阶段中，通过对在前一阶段中确定的表示执行映射操作来确定每个表示，并且其中所述 每个阶段的映射操作相同; 在每个阶段计算来自在所述阶段中确定的表示的变换的参数; 并且确定所述K级的哪一级被计算出所述参数的极值。 本发明还涉及用于对映射的信息携带值序列进行反映射的方法，装置，计算机程序和计算机程序产品，以及用于传送信息携带值的系统。

公开(公告)号：US08102882B2

公开(公告)日：2012-01-24

申请号：US11415725

申请日：2006-05-02

申请人： Haifeng Wang ,  Fang Wang ,  Ming Chen ,  Shixin Cheng

发明人： Haifeng Wang ,  Fang Wang ,  Ming Chen ,  Shixin Cheng

IPC分类号： H04J1/00

CPC分类号： H04W52/42 ,  H04L1/0045 ,  H04L1/0057 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/006

摘要： A multicarrier data transmission scheme is provided. According to the provided scheme, a radio transmitter encodes data bits with different degrees, the degree of an encoded data bit being defined by the number of parity check equations protecting the data bit. The data bits are preferably encoded with an irregular low-density parity check (LDPC) code. The encoded data bits are then mapped to symbols. The symbols are allocated to subcarriers of a multicarrier radio signal on the basis of channel state information obtained from the radio receiver and the degree used with respect to each symbol. On the basis of the channel state information, a number of subcarriers are truncated due to high attenuation, and the number of subcarriers to be truncated relative to the total number of subcarriers is substantially fixed. The available transmit power to the non-truncated subcarriers. The multicarrier signal comprising symbols on the non-truncated subcarriers is then transmitted to the radio receiver.

摘要翻译： 提供了一种多载波数据传输方案。 根据所提供的方案，无线电发射机对不同程度的数据比特进行编码，编码数据比特的程度由保护数据比特的奇偶校验方程数定义。 数据比特优选地用不规则的低密度奇偶校验（LDPC）码进行编码。 编码数据位然后映射到符号。 基于从无线电接收机获得的信道状态信息和相对于每个符号使用的程度，将符号分配给多载波无线电信号的子载波。 基于信道状态信息，由于高衰减而使多个子载波被截断，并且相对于子载波的总数而要被截断的子载波的数量基本上是固定的。 对非截断子载波的可用传输功率。 然后，将包括非截断子载波上的符号的多载波信号发送到无线电接收机。