公开(公告)号：US20100023699A1

公开(公告)日：2010-01-28

申请号：US12177341

申请日：2008-07-22

申请人： Timothy James Reidel ,  Li Zou

发明人： Timothy James Reidel ,  Li Zou

IPC分类号： G06F12/08 ,  G06F17/30 ,  G06F12/02

CPC分类号： G06Q10/06 ,  H04L67/22 ,  H04L69/12

摘要： A system and a method are described, whereby a data cache enables the realization of an efficient design of a usage analyzer for monitoring subscriber access to a communications network. By exploiting the speed advantages of cache memory, as well as adopting innovative data loading and retrieval choices, significant performance improvements in the time required to access the necessary data records can be realized.

摘要翻译： 描述了一种系统和方法，由此数据高速缓存能够实现使用分析器的有效设计，用于监视对通信网络的订户访问。 通过利用高速缓冲存储器的速度优势，以及采用创新的数据加载和检索选择，可以实现访问必要数据记录所需时间的显着性能改进。

公开(公告)号：US08566527B2

公开(公告)日：2013-10-22

申请号：US12177341

申请日：2008-07-22

申请人： Timothy James Reidel ,  Li Zou

发明人： Timothy James Reidel ,  Li Zou

IPC分类号： G06F12/06

CPC分类号： G06Q10/06 ,  H04L67/22 ,  H04L69/12

摘要： A system and a method are described, whereby a data cache enables the realization of an efficient design of a usage analyzer for monitoring subscriber access to a communications network. By exploiting the speed advantages of cache memory, as well as adopting innovative data loading and retrieval choices, significant performance improvements in the time required to access the necessary data records can be realized.

摘要翻译： 描述了一种系统和方法，由此数据高速缓存能够实现使用分析器的有效设计，用于监视对通信网络的订户访问。 通过利用高速缓冲存储器的速度优势，以及采用创新的数据加载和检索选择，可以实现访问必要数据记录所需时间的显着性能改进。

公开(公告)号：US08934330B2

公开(公告)日：2015-01-13

申请号：US13519577

申请日：2009-12-29

申请人： Ben Niu ,  Gang Liu ,  Li Zou

发明人： Ben Niu ,  Gang Liu ,  Li Zou

IPC分类号： H04J11/00 ,  H04L25/02 ,  H04L27/26

CPC分类号： H04L27/2647 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0222 ,  H04L25/0232

摘要： The present invention provides a method for channel estimation used in a receiver of a multi-carrier communication system, including: receiving a multi-carrier symbols from a transmitter of the multi-carrier communication system; and obtaining channel information of sub-carriers carrying data of the multi-carrier symbols, using selectively time direction interpolation and frequency direction interpolation for channel information of a plurality of scatter pilots of the multi-carrier symbols.

摘要翻译： 本发明提供一种用于多载波通信系统的接收机中的信道估计方法，包括：从多载波通信系统的发射机接收多载波符号; 以及使用多载波符号的多个散射导频的信道信息选择性地进行时间内插和频率方向插值来获得承载多载波符号数据的子载波的信道信息。

公开(公告)号：US08793551B2

公开(公告)日：2014-07-29

申请号：US12737107

申请日：2009-06-24

申请人： Wei Zhou ,  Li Zou ,  Yuping Zhao ,  Xiaoxin Zhang

发明人： Wei Zhou ,  Li Zou ,  Yuping Zhao ,  Xiaoxin Zhang

IPC分类号： H03M13/00

CPC分类号： H03M13/256 ,  H03M13/1171 ,  H03M13/253 ,  H04L1/0057 ,  H04L1/006 ,  H04L1/0065 ,  H04L27/3416 ,  H04L27/38

摘要： A concatenated coded modulation communication system and method combines Trellis Coded Modulation with non-Gray code constellation mapping, interleaving, and non-binary Low Density Parity Check coded channel modulation with Gray code constellation mapping to improve error performance.

摘要翻译： 串联编码调制通信系统和方法将格雷码编码调制与非格雷码组合映射，交错和非二进制低密度奇偶校验编码信道调制与格雷码星座映射相结合，以改善误码性能。

公开(公告)号：US08660203B2

公开(公告)日：2014-02-25

申请号：US13388820

申请日：2010-07-20

申请人： Wei Zhou ,  Li Zou ,  Yuping Zhao ,  Xiaoxin Zhang ,  Peng Liu ,  Charles Chuanming Wang

发明人： Wei Zhou ,  Li Zou ,  Yuping Zhao ,  Xiaoxin Zhang ,  Peng Liu ,  Charles Chuanming Wang

IPC分类号： H04B7/02

CPC分类号： H04L27/38 ,  H03M13/655 ,  H03M13/6552 ,  H04L27/2647 ,  H04L27/3405 ,  H04L27/3488

摘要： Modern coding and modulation techniques have greatly improved the transmission and reception of signals. A method is described including receiving a signal de-mapping the signal into a first and second substream, decoding the first and second substream using a low density parity check decoding process, and combining the first and second decoded substream into a single data stream. An apparatus is described including a symbol de-mapper that receives a signal de-maps the modulation symbols in the signal into a first and second substream, a first decoder that decodes the first substream using a low density parity check coding process at a first decoding rate, a second decoder that decodes the second substream at a second encoding rate, and a combiner that combines the first substream and the second substream into a single data stream.

摘要翻译： 现代编码和调制技术大大提高了信号的发送和接收。 描述了一种方法，包括接收将信号解映射到第一和第二子流中的信号，使用低密度奇偶校验解码过程对第一和第二子流进行解码，以及将第一和第二解码子流合并成单个数据流。 描述了一种装置，其包括接收将信号中的调制符号解映射成第一和第二子流的信号的符号解映射器，第一解码器，其在第一解码时使用低密度奇偶校验编码处理对第一子流进行解码 速率，以第二编码速率解码第二子流的第二解码器，以及将第一子流和第二子流组合成单个数据流的组合器。

公开(公告)号：US08385473B2

公开(公告)日：2013-02-26

申请号：US12450215

申请日：2007-03-16

申请人： Peng Liu ,  Li Zou

发明人： Peng Liu ,  Li Zou

IPC分类号： H04L27/00

CPC分类号： H04L27/0012 ,  H04L27/2601

摘要： A receiver supports a single carrier (SC) form of modulation and a multi-carrier form of modulation such as orthogonal frequency division multiplexing (OFDM). Upon receiving a signal, the receiver determines a maximum fluctuation range (MFR) as a function of at least a fourth-order cumulant of a received signal; and classifies a modulation type of the received signal as a function of the determined maximum fluctuation range. After determining the modulation type of the received signal, the receiver switches to that modulation mode to recover data from the received signal.

摘要翻译： 接收机支持单载波（SC）形式的调制和诸如正交频分复用（OFDM）的多载波调制形式。 在接收到信号时，接收机确定作为接收信号的至少四阶累积量的函数的最大波动范围（MFR）; 并且根据确定的最大波动范围对接收信号的调制类型进行分类。 在确定接收信号的调制类型之后，接收机切换到该调制模式以从接收到的信号中恢复数据。

公开(公告)号：US20120287803A1

公开(公告)日：2012-11-15

申请号：US13519577

申请日：2009-12-29

申请人： Ben Niu ,  Gang Liu ,  Li Zou

发明人： Ben Niu ,  Gang Liu ,  Li Zou

IPC分类号： H04L12/26

CPC分类号： H04L27/2647 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0222 ,  H04L25/0232

摘要： The present invention provides a method for channel estimation used in a receiver of a multi-carrier communication system, including: receiving a multi-carrier symbols from a transmitter of the multi-carrier communication system; and obtaining channel information of sub-carriers carrying data of the multi-carrier symbols, using selectively time direction interpolation and frequency direction interpolation for channel information of a plurality of scatter pilots of the multi-carrier symbols.

摘要翻译： 本发明提供一种用于多载波通信系统的接收机中的信道估计方法，包括：从多载波通信系统的发射机接收多载波符号; 以及使用多载波符号的多个散射导频的信道信息选择性地进行时间内插和频率方向插值来获得承载多载波符号数据的子载波的信道信息。

公开(公告)号：US20100119013A1

公开(公告)日：2010-05-13

申请号：US12452407

申请日：2007-06-29

申请人： Peng Liu ,  Jilin Zou ,  Li Zou

发明人： Peng Liu ,  Jilin Zou ,  Li Zou

IPC分类号： H04L27/22

CPC分类号： H04L27/2647 ,  H04L25/022 ,  H04L25/03159 ,  H04L27/3854

摘要： A receiver is a Digital Video Broadcasting-Terrestrial/Handheld (DVB-T/H) receiver. The DVB-T/H receiver comprises a fast fourier transform (FFT) operative on a signal for providing an FFT output signal comprising a number of samples; a spectrum shifter for reordering the samples in the FFT output signal to provide a spectrum shifted signal; and a phase corrector for estimating a phase error from the FFT output signal and for correcting a phase of the spectrum shifted signal in accordance with the estimated phase error.

摘要翻译： 接收机是数字视频广播地面/手持（DVB-T / H）接收机。 DVB-T / H接收机包括对信号进行操作的快速傅里叶变换（FFT），用于提供包括多个样本的FFT输出信号; 用于对FFT输出信号中的采样进行重新排序以提供频谱移位信号的频谱移位器; 以及相位校正器，用于根据所估计的相位误差估计来自FFT输出信号的相位误差并用于校正频移信号的相位。

公开(公告)号：US20100002788A1

公开(公告)日：2010-01-07

申请号：US12448886

申请日：2007-01-19

申请人： Yiling Wu ,  Li Zou ,  Peng Liu

发明人： Yiling Wu ,  Li Zou ,  Peng Liu

IPC分类号： H04L27/28

CPC分类号： H04L25/0232 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/006 ,  H04L25/0226 ,  H04L27/2601

摘要： The present invention provides an interpolating method for an OFDM system, a channel estimation method and apparatus, in which each OFDM symbol has scattered pilots inserted, and the interpolating method comprising: the step of inserting at least one copy of the first scattered pilot in each OFDM symbol before the first scattered pilot as virtual pilots, and inserting at least one copy of the last scattered pilot in each OFDM symbol behind the last scattered pilot as virtual pilots, after obtaining the channel state information on the sub-channels which propagate the scattered pilots in the OFDM symbols by linear filtering; and the step of performing interpolation by a FIR filter with the channel state information.

摘要翻译： 本发明提供了一种用于OFDM系统的内插方法，信道估计方法和装置，其中每个OFDM符号具有插入的散射导频，并且所述内插方法包括：将每个所述第一分散导频的至少一个副本插入到每个 在第一散射导频之前的OFDM符号作为虚拟导频，并且在获得在传播散射的子信道上的信道状态信息之后，将最后分散导频后面的每个OFDM符号中的最后分散导频的至少一个拷贝插入虚拟导频 OFDM符号中的导频通过线性滤波; 以及通过具有信道状态信息的FIR滤波器进行插值的步骤。

公开(公告)号：US07065576B2

公开(公告)日：2006-06-20

申请号：US09965691

申请日：2001-09-27

申请人： Ibrahim Mostafa Kamel ,  Li Zou

发明人： Ibrahim Mostafa Kamel ,  Li Zou

IPC分类号： G06F15/16 ,  G06F15/173

CPC分类号： H04W4/08 ,  H04L12/185 ,  H04L12/189 ,  H04W8/08 ,  H04W8/14

摘要： An area is divided into regions or cells each having an associated multicast group address. The cells are organized using a quad-tree data structure that is dynamically updated. Mobile entities within a given cell elect one of their members as coordinator for assessing cost data associated with subdividing or merging the cell with other sibling cells. The coordinators communicate this cost data to a partitioning entity, which may be a central server, that computes a new partition scheme using a greedy algorithm. The new partition scheme is then broadcast to the mobile entities for use in subsequent communication. Mobile entities join multicast groups that intersect with their individual vision domains. In this way, mobile entities can acquire information from other mobile entities without the need to monitor all multicast group transmissions.