公开(公告)号：US09231754B2

公开(公告)日：2016-01-05

申请号：US14148295

申请日：2014-01-06

申请人： Futurewei Technologies, Inc.

发明人： Dong Wei ,  Guozhu Long ,  Jianhua Liu ,  Guijin Xu ,  Anni Wu

IPC分类号： H04J3/06 ,  H04L7/04 ,  H04L27/26

CPC分类号： H04L7/041 ,  H04J3/0638 ,  H04J3/065 ,  H04J3/0667 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675

摘要： An apparatus comprising a customer node configured to couple to an access node and to receive via a channel from the access node a time of day (TOD) value and a corresponding sample index (SNUM) value, wherein the TOD value and the SNUM value are used to estimate a second time of day (TOD′) value based on a propagation delay of the channel (L-Delay), and wherein the TOD value and the TOD′ value are used to estimate a second SNUM value (SNUM′) based on L-Delay and a plurality of parameters.

摘要翻译： 一种装置，包括被配置为耦合到接入节点并且经由来自接入节点的信道的时间（TOD）值和对应的采样索引（SNUM）值接收的客户节点，其中，所述TOD值和所述SNUM值是 用于基于通道的传播延迟（L-Delay）来估计第二时间（TOD'）值，并且其中TOD值和TOD'值用于基于第二SNUM值（SNUM'）估计 L-Delay和多个参数。

公开(公告)号：US20150358186A1

公开(公告)日：2015-12-10

申请号：US14269246

申请日：2014-05-05

申请人： Redline Communications, Inc.

发明人： Octavian Valeriu Sarca

IPC分类号： H04L27/01 ,  H04L27/26 ,  G06F9/38

CPC分类号： H04L27/01 ,  G06F9/3869 ,  H04J11/00 ,  H04L5/006 ,  H04L25/03159 ,  H04L25/03891 ,  H04L27/2601 ,  H04L27/265 ,  H04L27/2675 ,  H04L2025/03433 ,  H04L2025/03605

摘要： A system for an orthogonal frequency division multiplexed (OFDM) equalizer, said system comprising a program memory, a program sequencer and a processing unit connected to each other, wherein the processing unit comprises an input selection unit, an arithmetic logic unit (ALU), a coprocessor and an output selection unit; further wherein the program sequencer schedules the processing of one or more symbol-carrier pairs input to said OFDM equalizer using multiple threads; retrieves, for each of the one or more symbol-carrier pairs, multiple program instructions from said program memory; generates multiple expanded instructions corresponding to said retrieved multiple program instructions; and further wherein said ALU performs said processing of the one or more symbol-carrier pairs using the multiple threads across multiple pipeline stages, wherein said processing comprises said ALU executing arithmetic operations to process said expanded instructions using said multiple threads across the multiple pipeline stages.

摘要翻译： 一种用于正交频分复用（OFDM）均衡器的系统，所述系统包括程序存储器，程序定序器和彼此连接的处理单元，其中处理单元包括输入选择单元，算术逻辑单元（ALU） 协处理器和输出选择单元; 其中所述程序定序器使用多个线程调度输入到所述OFDM均衡器的一个或多个符号 - 载波对的处理; 对于所述一个或多个符号 - 载体对中的每一个检索来自所述程序存储器的多个程序指令; 产生对应于所述检索的多个程序指令的多个扩展指令; 并且其中所述ALU使用跨多个流水线级的多个线程执行所述一个或多个符号 - 载波对的所述处理，其中所述处理包括所述ALU执行算术运算，以使用所述多个流水线级上的所述多个线程来处理所述扩展指令。

公开(公告)号：US09197400B1

公开(公告)日：2015-11-24

申请号：US13898156

申请日：2013-05-20

申请人： MARVELL INTERNATIONAL LTD.

发明人： Jing Fang

IPC分类号： H04L27/06 ,  H04L7/00

CPC分类号： H04L27/2678 ,  H04L7/0079 ,  H04L27/2657 ,  H04L27/2672 ,  H04L27/2675

摘要： In a method for determining timing information in a receiver, a receiver receives a modulated signal and demodulates the modulated signal using an demodulator to produce a demodulated signal. An analog to digital converter converts the demodulated signal to a digital signal and first and second signals are produced from the digital signal. The first signal is analyzed to determine a first phase difference with respect to different portions of the signal, and the second signal is analyzed to determine a second phase difference with respect to different portions of the second signal. The second signal is a frequency domain representation of at least a portion of the first signal. A joint estimate of a sampling period offset and a carrier frequency offset is generated based on the first phase difference and the second phase difference.

摘要翻译： 在用于确定接收机中定时信息​​的方法中，接收机接收调制信号并使用解调器解调调制信号以产生解调信号。 模数转换器将解调信号转换为数字信号，并从数字信号产生第一和第二信号。 分析第一信号以确定关于信号的不同部分的第一相位差，并且分析第二信号以确定关于第二信号的不同部分的第二相位差。 第二信号是第一信号的至少一部分的频域表示。 基于第一相位差和第二相位差产生采样周期偏移和载波频率偏移的联合估计。

公开(公告)号：US20150333858A1

公开(公告)日：2015-11-19

申请号：US14792822

申请日：2015-07-07

申请人： Electronics and Telecommunications Research Institute

发明人： Il Gyu KIM ,  Hyeong Geun PARK ,  Young Jo KO ,  Kapseok CHANG ,  Hyo Seok YI ,  Young Hoon KIM ,  Seung Chan BANG

IPC分类号： H04J11/00 ,  H04L27/26

CPC分类号： H04W56/001 ,  H04J11/0069 ,  H04J11/0093 ,  H04L5/0037 ,  H04L5/005 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2675 ,  H04W36/0061 ,  H04W36/08 ,  H04W56/00

摘要： A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.

摘要翻译： 一种用于搜索其中多个小区被分组成多个小区组的通信系统的移动站中的小区的方法和装置，并且每个小区组包括至少两个小区。 该方法包括从接收信号检测主同步信号和次同步信号，以及基于主同步信号和次同步信号的组合来识别小区。 次同步信号与移动站所属的小区组相关，主同步信号与移动站所属小区相关。

公开(公告)号：US09178686B2

公开(公告)日：2015-11-03

申请号：US13983924

申请日：2012-01-20

申请人： Handa Chen

发明人： Handa Chen

IPC分类号： H04B17/02 ,  H04L7/00 ,  H04L7/04 ,  H04L27/26

CPC分类号： H04L7/0041 ,  H04L7/042 ,  H04L27/2656 ,  H04L27/2675 ,  H04L27/2692

摘要： A technique capable of improving a packet catch rate when applied to a communication device, for example. An SNR improvement circuit for improving an SNR of an input signal includes a delay unit for delaying the input signal to generate one or more delay signals, and an adder for adding the one or more delay signals and the input signal before being delayed. The input signal contains a periodic signal in which the same signal is repeated a predetermined number of times with a predetermined period. The delay unit generates the one or more delay signals with delay time which is α times (α is a natural number, and is set at different values with respect to two or more delay signals) longer than the predetermined period.

摘要翻译： 例如，当应用于通信设备时能够提高分组捕获速率的技术。 用于改善输入信号的SNR的SNR改善电路包括用于延迟输入信号以产生一个或多个延迟信号的延迟单元，以及用于在延迟之前将一个或多个延迟信号和输入信号相加的加法器。 输入信号包含周期信号，其中相同的信号以预定的周期重复预定次数。 延迟单元产生延迟时间为α倍（α为自然数，并相对于两个或更多个延迟信号设定在比预定周期长的不同值）的一个或多个延迟信号。

公开(公告)号：US09172571B2

公开(公告)日：2015-10-27

申请号：US14040700

申请日：2013-09-29

申请人： Apple Inc.

发明人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

IPC分类号： H04L27/26 ,  H04L5/00 ,  H04L7/00 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06

CPC分类号： H04W36/08 ,  H04B7/022 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/0667 ,  H04B7/0697 ,  H04J11/0069 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0048 ,  H04L7/0008 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2627 ,  H04L27/2628 ,  H04L27/2663 ,  H04L27/2665 ,  H04L27/2672 ,  H04L27/2675

摘要： A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.

公开(公告)号：US09172503B2

公开(公告)日：2015-10-27

申请号：US13300471

申请日：2011-11-18

申请人： Harri J. Pekonen ,  Heidi Himmannen

发明人： Harri J. Pekonen ,  Heidi Himmannen

IPC分类号： H03M13/00 ,  H04L1/00 ,  H04L27/26 ,  H04L12/939

CPC分类号： H04L1/0072 ,  H04L1/007 ,  H04L1/008 ,  H04L27/261 ,  H04L27/2675 ,  H04L49/557

摘要： A system and method for improving signaling channel robustness. Additional error correction is provided for (L1) dynamic signaling that is carried in P2 symbols in such way that high time diversity can be provided. In other embodiments, transmitted services are scheduled such that services will rotate or “move” between frames, thereby ensuring that a first slot for a service is not always transmitted in the same frequency.

摘要翻译： 一种用于改善信令信道鲁棒性的系统和方法。 为（P2）符号携带的（L1）动态信令提供额外的纠错，使得可以提供高时间分集。 在其他实施例中，传送的服务被调度为使得服务将在帧之间旋转或“移动”，从而确保用于服务的第一时隙不总是以相同的频率发送。

公开(公告)号：US20150256375A1

公开(公告)日：2015-09-10

申请号：US14721886

申请日：2015-05-26

申请人： Sony Corporation

发明人： Gholam Hosein ASJADI

IPC分类号： H04L27/26

CPC分类号： H04L27/2649 ,  H04L1/0057 ,  H04L1/0071 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2601 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2627 ,  H04L27/2647 ,  H04L27/265 ,  H04L27/2666 ,  H04L27/2671 ,  H04L27/2672 ,  H04L27/2675 ,  H04L2025/03414

摘要： The receiver comprises a demodulator configured to detect a signal representing the OFDM symbols and to generate a sampled digital version of the OFDM symbols in the time domain. A Fourier transform processor is configured to receive the time domain digital version of the OFDM symbols and to form a frequency domain version of the OFDM symbols, from which the pilot symbol bearing sub-carriers and the data symbol bearing sub-carriers can be recovered. A detector is configured to recover the data symbols from the data bearing sub-carriers of the OFDM symbols and to recover the pilot symbols from the pilot bearing sub-carriers of the OFDM symbols in accordance with the continuous pilot symbol pattern. The continuous pilot symbols are present at the same sub-carrier locations in first OFDM symbols and as second OFDM symbols. A transmitter is also provided.

摘要翻译： 接收机包括解调器，其被配置为检测表示OFDM符号的信号并且在时域中生成OFDM符号的采样数字版本。 傅里叶变换处理器被配置为接收OFDM符号的时域数字版本并且形成OFDM符号的频域版本，从中可以恢复带有导频符号的子载波和带有数据符号的子载波。 检测器被配置为从OFDM码元的承载子载波的数据符号中恢复数据符号，并且根据连续的导频符号模式从OFDM符号的导频承载子载波恢复导频符号。 连续导频符号存在于第一OFDM符号中的相同子载波位置处和作为第二OFDM符号。 还提供发射机。

公开(公告)号：US20150249518A1

公开(公告)日：2015-09-03

申请号：US14714027

申请日：2015-05-15

申请人： SHARP KABUSHIKI KAISHA

发明人： Shoichi SHITARA

IPC分类号： H04J11/00 ,  H04L27/26 ,  H04L5/00 ,  H04W28/06

CPC分类号： H04J11/0073 ,  H04J11/0069 ,  H04J11/0076 ,  H04J11/0079 ,  H04L5/0023 ,  H04L5/005 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2675 ,  H04W8/005 ,  H04W28/06 ,  H04W48/08 ,  H04W64/00 ,  H04W88/08

摘要： A mobile station communicates with a base station controlling over a cell containing a plurality of sectors. The mobile station also receives, from a base station, data of synchronization channels which includes sector specific codes respectively corresponding to sector identification numbers for identifying the sectors. In addition, the mobile station performs synchronization detection with reference to the data of synchronization channels, where the data of the synchronization channels mapped to a plurality of predetermined symbols at intervals of a half period of a frame and a plurality of predetermined subcarriers are specific to respective sectors in the same cell and common among adjacent cells.

摘要翻译： 移动台与在包含多个扇区的小区进行控制的基站进行通信。 移动台还从基站接收同步信道的数据，该同步信道包括分别对应于用于识别扇区的扇区标识号码的扇区特定码。 此外，移动站参照同步信道的数据执行同步检测，其中以帧的半周期和多个预定子载波的间隔映射到多个预定符号的同步信道的数据是特定于 相邻单元中的相应扇区和相邻小区中的公共。

公开(公告)号：US20150229368A1

公开(公告)日：2015-08-13

申请号：US14626482

申请日：2015-02-19

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Jun MA

IPC分类号： H04B7/04 ,  H04B7/08

CPC分类号： H04B7/0413 ,  H04B7/04 ,  H04B7/0811 ,  H04L7/04 ,  H04L27/2656 ,  H04L27/2675

摘要： Embodiments of the present invention provide a frame synchronization method. The frame synchronization method of the wireless system includes: separately delaying a signal received from one of N receiving antennas in K tributaries, and outputting K delayed signals, where N and K are positive integers; generating a first output signal by performing a correlation operation on the K delayed signals and a preamble subsequence; generating a second output signal by performing the correlation operation on each of the K delayed signals and each of the K delayed signals itself; and performing cancellation processing for the first output signal and the second output signal to obtain a string of data stream, obtaining a maximum value of the string of data stream as a correlation peak, so as to determine a position of a frame header according to a time point corresponding to the correlation peak.

摘要翻译： 本发明的实施例提供一种帧同步方法。 无线系统的帧同步方法包括：分别延迟从K个支路中的N个接收天线之一接收的信号，并输出K个延迟信号，其中N和K是正整数; 通过对K个延迟信号和前同步码序列执行相关运算来产生第一输出信号; 通过对K个延迟信号和K个延迟信号本身中的每一个执行相关运算来产生第二输出信号; 以及对所述第一输出信号和所述第二输出信号执行取消处理以获得一串数据流，获得所述数据串串的最大值作为相关峰值，以便根据第一输出信号和第二输出信号确定帧头的位置 时间点对应于相关峰值。