公开(公告)号：US09391824B2

公开(公告)日：2016-07-12

申请号：US14194736

申请日：2014-03-02

申请人： Esmael Hejazi Dinan

发明人： Esmael Hejazi Dinan

IPC分类号： H04J11/00 ,  H04J3/06 ,  H04W4/00 ,  H04W56/00 ,  H04L7/00 ,  H04L27/28 ,  H04L27/26 ,  H04L5/00 ,  H04W72/04 ,  H04W74/00

CPC分类号： H04W56/0045 ,  H04L5/0085 ,  H04L5/0098 ,  H04L27/2657 ,  H04L27/2666 ,  H04W56/0005 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0453 ,  H04W74/006 ,  H04W74/0833

摘要： Transmission timing of a random access preamble in an uplink carrier of a carrier group being determined employing a synchronization signal transmitted on a downlink carrier of the carrier group. The wireless device receives a time alignment command from the base station. The time alignment command comprises a time adjustment value and an index identifying the carrier group. The wireless device applies the time adjustment value to uplink signals transmitted on all activated uplink carriers in the carrier group.

摘要翻译： 使用在载波组的下行链路载波上发送的同步信号来确定载波组的上行链路载波中的随机接入前导码的发送定时。 无线设备从基站接收时间对准命令。 时间对准命令包括时间调整值和识别载波组的索引。 无线设备将时间调整值应用于在载波组中的所有激活的上行链路载波上发送的上行链路信号。

公开(公告)号：US09385908B2

公开(公告)日：2016-07-05

申请号：US14151964

申请日：2014-01-10

申请人： Icom Incorporated

发明人： Nobuyoshi Nishikawa

IPC分类号： H04L27/28 ,  H04L27/26

CPC分类号： H04L27/2636 ,  H04L27/262

摘要： A communication apparatus comprises an inserter that inserts an element having a value of 0 or nearly 0 into a predetermined position of a modulated signal to generate inserted data; an operator that adds a pilot signal comprising a data series of which the elements at the positions corresponding to the predetermined positions in the modulated signal are multiplied by a first amplitude coefficient and the elements other than the elements multiplied by the first amplitude coefficient are multiplied by a second amplitude coefficient to the inserted data to generate a post-operation data; an IFFT unit that performs IFFT on the post-operation data; and a transmitter that generates a baseband signal based on the post-operation data on which the IFFT is performed and transmits a transmission signal generated from the baseband signal.

摘要翻译： 通信装置包括插入器，其将具有0或接近0的值的元素插入调制信号的预定位置以产生插入数据; 一个运算符，其加上一个导频信号，该导频信号包括数据序列，其中与调制信号中的预定位置相对应的位置处的元素被乘以第一幅度系数，并将乘以第一幅度系数的元素之外的元素乘以 对所插入的数据的第二幅度系数，以产生操作后数据; 对操作后数据执行IFFT的IFFT单元; 以及发送器，其基于执行了IFFT的后期操作数据生成基带信号，并发送从基带信号生成的发送信号。

公开(公告)号：US09383430B2

公开(公告)日：2016-07-05

申请号：US14932031

申请日：2015-11-04

申请人： Deere & Company

发明人： Richard G. Keegan

IPC分类号： H04L1/02 ,  H04L27/28 ,  G01S5/02 ,  H04L27/26

CPC分类号： G01S5/0273 ,  G01S5/02 ,  G01S5/021 ,  G01S5/0221 ,  G01S5/0278 ,  G01S5/08 ,  G01S5/14 ,  H04L1/02 ,  H04L27/26 ,  H04L27/2601 ,  H04L27/2663 ,  H04L27/2665 ,  H04L27/28 ,  H04W64/00

摘要： A first estimator determines a coarse estimate of a time of arrival of at least one subcarrier of an OFDM-like multitone signals by adjusting the coarse estimate of the time of arrival in accordance with a code (first) correlation function. A second estimator determines a precise estimate of the time of arrival of at least one subcarrier of the OFDM-like multitone signals by adjusting the precise time of arrival to align the slope of the subcarrier phases of the OFDM-like multitone signals in accordance with a phase (second) correlation function and consistent with the coarse estimate of the time of arrival associated with the code correlation function. A data processor estimates the location of the receiver or estimated range based on the precise estimate.

摘要翻译： 第一估计器通过根据代码（第一）相关函数调整到达时间的粗略估计来确定OFDM类多音信号的至少一个副载波的到达时间的粗估计。 第二估计器通过调整精确的到达时间来确定OFDM类多音信号的至少一个副载波的到达时间的精确估计，以使得类似OFDM的多音信号的副载波相位的斜率根据 相位（第二）相关函数，与与码相关函数相关的到达时间的粗略估计一致。 数据处理器基于精确估计来估计接收机的位置或估计范围。

公开(公告)号：US20160191292A1

公开(公告)日：2016-06-30

申请号：US15060727

申请日：2016-03-04

申请人： LG Electronics Inc.

发明人： Dae Won LEE ,  Yu Jin NOH ,  Byeong Woo KANG ,  Yong Ho SEOK

IPC分类号： H04L27/28 ,  H04B7/04 ,  H04B7/06

CPC分类号： H04L69/323 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06 ,  H04L27/2626 ,  H04L27/2646 ,  H04L27/2647 ,  H04L27/28 ,  H04W84/12

摘要： A method for transmitting data in a wireless local area network, and a device therefore are discussed. The method according to one embodiment includes generating, by a transmitter, a very high throughput (VHT)-SIG-A field; generating, by the transmitter, a VHT-SIG-B field by applying a single column vector; and transmitting, by the transmitter, a physical layer protocol data unit (PPDU) to a receiver, the PPDU including the VHT-SIG-A field and the VHT-SIG-B field. The single column vector is obtained from a number of spatial streams for the receiver.

摘要翻译： 因此，讨论了在无线局域网中发送数据的方法和装置。 根据一个实施例的方法包括由发射机生成非常高吞吐量（VHT）-SIG-A场; 通过应用单列向量，由发射机生成VHT-SIG-B字段; 并且由所述发射机将物理层协议数据单元（PPDU）发送到接收机，所述PPDU包括所述VHT-SIG-A字段和所述VHT-SIG-B字段。 单列向量从接收机的多个空间流中获得。

公开(公告)号：US09363127B1

公开(公告)日：2016-06-07

申请号：US14530162

申请日：2014-10-31

申请人： Ertugrul Guvenkaya ,  Huseyin Arslan

发明人： Ertugrul Guvenkaya ,  Huseyin Arslan

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04L27/26

CPC分类号： H04L27/2647 ,  H04L25/03821 ,  H04L25/03834 ,  H04L27/2626 ,  H04L27/2637 ,  H04L27/2653

摘要： An optimum time domain windowing scheme for orthogonal frequency-division multiplexing (OFDM)-based waveforms in the sense of spectral concentration is proposed. Instead of evenly suppressing the sidelobes along the frequency, the sidelobe power is concentrated within a guard band while maximally suppressing the power for a desired frequency range. This is achieved by employing optimum finite duration pulses, prolate spheroidal wave functions (PSWF), to shape the OFDM transmit pulse. Also with per-subcarrier windowing scheme, the effect of inner subcarriers on sidelobes is diminished by utilizing the concentration bandwidth versus out-of-band power trade-off in PSWF and the multicarrier nature of the OFDM.

摘要翻译： 提出了在频谱浓度意义上的基于正交频分复用（OFDM）的波形的最佳时域加窗方案。 代替均匀地抑制沿着频率的旁瓣，旁瓣功率集中在保护带内，同时最大限度地抑制期望频率范围的功率。 这是通过采用最佳有限持续时间脉冲，扁平球形波函数（PSWF）来实现的，以形成OFDM发射脉冲。 同样采用每子载波加窗方案，通过利用集中带宽与PSWF中的带外功率权衡和OFDM的多载波特性，内部副载波对旁瓣的影响减小。

公开(公告)号：US09336788B2

公开(公告)日：2016-05-10

申请号：US14460464

申请日：2014-08-15

申请人： GOOGLE TECHNOLOGY HOLDINGS LLC

发明人： James P. Ashley ,  Udar Mittal

IPC分类号： H04L27/28 ,  G10L19/038

CPC分类号： H04N19/94 ,  G10L19/038 ,  H03M7/3082 ,  H03M7/4018 ,  H04N19/1887

摘要： Improved methods for coding an ensemble of pulse vectors utilize statistical models (i.e., probability models) for the ensemble of pulse vectors, to more efficiently code each pulse vector of the ensemble. At least one pulse parameter describing the non-zero pulses of a given pulse vector is coded using the statistical models and the number of non-zero pulse positions for the given pulse vector. In some embodiments, the number of non-zero pulse positions are coded using range coding. The total number of unit magnitude pulses may be coded using conditional (state driven) bitwise arithmetic coding. The non-zero pulse position locations may be coded using adaptive arithmetic coding. The non-zero pulse position magnitudes may be coded using probability-based combinatorial coding, and the corresponding sign information may be coded using bitwise arithmetic coding. Such methods are well suited to coding non-independent-identically-distributed signals, such as coding video information.

摘要翻译： 编码脉冲向量集合的改进方法利用用于脉冲向量集合的统计模型（即，概率模型），以更有效地编码集合的每个脉冲向量。 描述给定脉冲矢量的非零脉冲的至少一个脉冲参数使用统计模型和给定脉冲向量的非零脉冲位置的数量进行编码。 在一些实施例中，使用范围编码对非零脉冲位置的数量进行编码。 可以使用条件（状态驱动）按位算术编码对单位幅度脉冲的总数进行编码。 可以使用自适应算术编码对非零脉冲位置位置进行编码。 可以使用基于概率的组合编码来对非零脉冲位置幅度进行编码，并且可以使用按位运算编码对相应的符号信息进行编码。 这样的方法非常适合于编码非独立相同分布的信号，例如编码视频信息。

公开(公告)号：US09325461B2

公开(公告)日：2016-04-26

申请号：US14702436

申请日：2015-05-01

申请人： LG ELECTRONICS INC.

发明人： Moon Il Lee ,  Jae Hoon Chung ,  Hyun Soo Ko ,  Seung Hee Han

IPC分类号： H04L27/28 ,  H04L5/00 ,  H04L27/26

CPC分类号： H04L5/0007 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/068 ,  H04B7/0684 ,  H04B7/0691 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2647

摘要： A method and an apparatus for transmitting a reference signal in a multiple antenna system are provided. The method includes transmitting a first reference signal based on a first sequence through a first antenna group, and transmitting a second reference signal based on a second sequence through a second antenna group, wherein the first reference signal and the second reference signal are transmitted through a same radio resource.

公开(公告)号：US09312939B2

公开(公告)日：2016-04-12

申请号：US14543055

申请日：2014-11-17

申请人： MARVELL WORLD TRADE LTD.

发明人： Rohit U. Nabar ,  Hongyuan Zhang ,  Sudhir Srinivasa ,  Xiayu Zheng

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04B7/06

CPC分类号： H04B7/0417 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0634

摘要： In a method for beamforming in a multiple input multiple output (MIMO) communication system, a data unit is received from a communication device via a MIMO communication channel, and it is determined whether the data unit satisfies one or more selection criteria. Further, when it is determined that the data unit satisfies the one or more selection criteria, the data unit is selected to be used in developing a steering matrix for transmitting data units to the communication device.

摘要翻译： 在多输入多输出（MIMO）通信系统中的波束形成方法中，经由MIMO通信信道从通信设备接收数据单元，并且确定数据单元是否满足一个或多个选择标准。 此外，当确定数据单元满足一个或多个选择标准时，数据单元被选择用于开发用于向通信设备发送数据单元的导向矩阵。

公开(公告)号：US09294179B2

公开(公告)日：2016-03-22

申请号：US13367799

申请日：2012-02-07

申请人： Colin D. Frank ,  Tyler A. Brown ,  Sandeep H. Krishnamurthy

发明人： Colin D. Frank ,  Tyler A. Brown ,  Sandeep H. Krishnamurthy

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04B7/06 ,  H04L25/02

CPC分类号： H04B7/0632 ,  H04B7/0634 ,  H04B7/0639 ,  H04L25/0204 ,  H04L25/0228

摘要： A wireless communication device and a method therein includes estimating a channel for each of a plurality of transmit antenna ports using a reference symbol received from the corresponding antenna port, determining a composite channel estimate based on the estimated channels and based on a precoding matrix, and determining an updated composite channel estimate using the composite channel estimate and using a gain correction corresponding to the precoding matrix. The gain correction can be obtained over-the-air or computed at the wireless communication device.

摘要翻译： 无线通信装置及其方法包括：使用从对应的天线端口接收的参考符号来估计多个发射天线端口中的每一个的信道，基于估计的信道确定复合信道估计，并且基于预编码矩阵，以及 使用所述复合信道估计来确定更新的复合信道估计并使用与所述预编码矩阵相对应的增益校正。 可以通过无线通信或无线通信设备计算增益校正。

公开(公告)号：US09282525B2

公开(公告)日：2016-03-08

申请号：US13925023

申请日：2013-06-24

申请人： Jianqiang Zeng ,  Steven M. Bosze ,  Raja V. Tamma ,  Kevin B. Traylor ,  Khurram Waheed

发明人： Jianqiang Zeng ,  Steven M. Bosze ,  Raja V. Tamma ,  Kevin B. Traylor ,  Khurram Waheed

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04W56/00

CPC分类号： H04W56/0005

摘要： Methods and systems are disclosed for frequency-domain symbol and frame synchronization for multi-carrier communication systems. Received signals are sampled and converted into frequency components associated with subcarriers within the multi-carrier communication signals. Symbol synchronization is performed in the frequency domain by performing correlation(s) between frequency components of the received signal and frequency-domain synchronization symbol(s). After symbol synchronization, frame synchronization correlation is also performed in the frequency domain between frequency components of the received signal and frequency-domain synchronization symbol(s). The disclosed embodiments are particularly useful for symbol and frame synchronization in multi-carrier received signals for power line communication (PLC) systems and/or other harsh noisy communication environments.

摘要翻译： 公开了用于多载波通信系统的频域符号和帧同步的方法和系统。 接收的信号被采样并转换成与多载波通信信号内的子载波相关联的频率分量。 通过执行接收信号的频率分量与频域同步符号之间的相关性，在频域中执行符号同步。 在符号同步之后，也在接收信号的频率分量与频域同步符号之间的频域中执行帧同步相关。 所公开的实施例对于用于电力线通信（PLC）系统和/或其他恶劣的噪声通信环境的多载波接收信号中的符号和帧同步特别有用。