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.

公开(公告)号：US08879380B2

公开(公告)日：2014-11-04

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

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.

公开(公告)号：US08654880B2

公开(公告)日：2014-02-18

申请号：US13388810

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： H04L27/3488 ,  H03M13/1171 ,  H03M13/15 ,  H03M13/1515 ,  H03M13/255 ,  H03M13/2732 ,  H03M13/2906 ,  H03M13/356 ,  H04L1/0041 ,  H04L1/0058 ,  H04L1/0071 ,  H04L27/2626 ,  H04L27/3405 ,  H04L27/36

摘要： Modern coding and modulation techniques have greatly improved the transmission of signals. A method is described including receiving a stream of data bits, demultiplexing the stream into a first and second substream, encoding the first and second substream using a low density parity check coding process, and mapping the first substream to a first region of a symbol constellation map and the second substream to a second region. Also, an apparatus is described including a demultiplexer that produces a first and second bitstream, a first encoder that encodes the first substream using a low density parity check coding process at a first encoding rate, a second encoder that encodes the second substream at a second rate, and a symbol mapper that maps bits from the first substream to a first region of a symbol constellation map and maps bits from the second substream to a second region.

摘要翻译： 现代编码和调制技术大大提高了信号的传输。 描述了一种方法，包括接收数据比特流，将流解复用为第一和第二子流，使用低密度奇偶校验编码过程对第一和第二子流进行编码，以及将第一子流映射到符号星座的第一区域 将第二子流映射到第二区域。 此外，描述了一种包括产生第一和第二比特流的解复用器的装置，使用第一编码率的低密度奇偶校验编码处理对第一子流进行编码的第一编码器，第二编码器，其在第二编码器中编码第二子流 速率，以及符号映射器，其将来自第一子流的比特映射到符号星座图的第一区域，并将来自第二子流的比特映射到第二区域。

公开(公告)号：US08559490B2

公开(公告)日：2013-10-15

申请号：US12452411

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： H04B3/46 ,  H04B17/00 ,  H04Q1/20

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 phase error corrector and a channel estimation and equalization element. The phase error corrector rotates a signal in accordance with an estimate of a phase error, e.g., CPE, which is determined as a function of channel state information (CSI) provided by the channel estimation and equalization element.

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接收机包括相位误差校正器和信道估计和均衡元件。 相位误差校正器根据由信道估计和均衡元件提供的信道状态信息（CSI）的函数确定的相位误差（例如CPE）的估计来旋转信号。

公开(公告)号：US08516556B2

公开(公告)日：2013-08-20

申请号：US12790499

申请日：2010-05-28

申请人： James MacNider ,  Avi Lior ,  Li Zou

发明人： James MacNider ,  Avi Lior ,  Li Zou

IPC分类号： G06F15/16

CPC分类号： H04L63/0892 ,  H04L47/19 ,  H04L47/2433 ,  H04L47/32

摘要： Methods for congestion control by a AAA server are provided. In an embodiment of the invention a hint indicator is embedded in reply messages from a AAA server. In subsequent messages received by that AAA server, the AAA server determines when the hint indicator is present. Processing decisions for the subsequent message are based on the presence of the hint indicator. In another embodiment, a method for congestion control at the AAA server is provided. At the AAA server a message received from a network access server is stored and timestamped in an ingress message queue. A congestion state for the AAA server is determined based on an ingress queue state and a message age state. The message is processed based on the congestion state. In alternative embodiments, message processing is based on the congestion state, message type and number of round trip messages.

摘要翻译： 提供AAA服务器的拥塞控制方法。 在本发明的实施例中，提示指示符嵌入在来自AAA服务器的应答消息中。 在该AAA服务器接收到的后续消息中，AAA服务器确定提示指示器何时存在。 后续消息的处理决定基于提示指示符的存在。 在另一实施例中，提供了一种AAA服务器的拥塞控制方法。 在AAA服务器处，从网络接入服务器接收到的消息被存储并存入入口消息队列中。 基于进入队列状态和消息时间状态来确定AAA服务器的拥塞状态。 基于拥塞状态处理消息。 在替代实施例中，消息处理基于拥塞状态，消息类型和往返消息数量。

公开(公告)号：US08401097B2

公开(公告)日：2013-03-19

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： H04K1/10

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：US20110296500A1

公开(公告)日：2011-12-01

申请号：US12790499

申请日：2010-05-28

申请人： James MacNider ,  Avi Lior ,  Li Zou

发明人： James MacNider ,  Avi Lior ,  Li Zou

IPC分类号： G06F21/00

CPC分类号： H04L63/0892 ,  H04L47/19 ,  H04L47/2433 ,  H04L47/32

摘要： Methods for congestion control by a AAA server are provided. In an embodiment of the invention a hint indicator is embedded in reply messages from a AAA server. In subsequent messages received by that AAA server, the AAA server determines when the hint indicator is present. Processing decisions for the subsequent message are based on the presence of the hint indicator. In another embodiment, a method for congestion control at the AAA server is provided. At the AAA server a message received from a network access server is stored and timestamped in an ingress message queue. A congestion state for the AAA server is determined based on an ingress queue state and a message age state. The message is processed based on the congestion state. In alternative embodiments, message processing is based on the congestion state, message type and number of round trip messages.

摘要翻译： 提供AAA服务器的拥塞控制方法。 在本发明的实施例中，提示指示符嵌入在来自AAA服务器的应答消息中。 在该AAA服务器接收到的后续消息中，AAA服务器确定提示指示器何时存在。 后续消息的处理决定基于提示指示符的存在。 在另一实施例中，提供了一种AAA服务器的拥塞控制方法。 在AAA服务器处，从网络接入服务器接收到的消息被存储并存入入口消息队列中。 基于进入队列状态和消息时间状态来确定AAA服务器的拥塞状态。 基于拥塞状态处理消息。 在替代实施例中，消息处理基于拥塞状态，消息类型和往返消息数量。

公开(公告)号：US20110264982A1

公开(公告)日：2011-10-27

申请号：US12998418

申请日：2009-10-16

申请人： Wei Zhou ,  Li Zou

发明人： Wei Zhou ,  Li Zou

IPC分类号： H03M13/07 ,  G06F11/10 ,  H03M13/29

CPC分类号： G06F11/10 ,  H04L1/0072 ,  H04L1/008 ,  H04L1/0083

摘要： A method for protecting signalling information in a frame to be transmitted to a receiver in a communication system, comprising: encoding frame signalling information of the frame to protect the frame signalling information; and encoding Forward Error Correaction FEC block signalling information of FEC blocks in the frame by using Reed-Muller codes to protect the FEC block signaling information.

摘要翻译： 一种用于保护要发送到通信系统中的接收机的帧中的信令信息的方法，包括：对所述帧的帧信令信息进行编码以保护所述帧信令信息; 并通过使用Reed-Muller码来编码帧中FEC块的前向纠错FEC块信令信息，以保护FEC块信令信息。