公开(公告)号：US09112571B1

公开(公告)日：2015-08-18

申请号：US14622615

申请日：2015-02-13

申请人： THALES

发明人： Mathieu Raimondi ,  Hanaa Al Bitar ,  Charles Fernet

IPC分类号： H04B1/00 ,  H04B1/10 ,  H04B7/185 ,  H04B1/76 ,  H04B1/69

CPC分类号： H04B1/1081 ,  G01S19/21 ,  G01S19/30 ,  H04B1/69 ,  H04B1/76 ,  H04B7/185

摘要： A method is provided for correlating a received satellite radio-navigation signal made up of a first pilot signal modulated with a first spreading code and a second data signal modulated with a second primary spreading code of a length equal to that of the first spreading code, the second data signal being further modulated with a secondary sequence comprising a plurality of chips, the duration of a chip being equal to a multiple of the length of the second primary spreading code, the first pilot signal and the second data signal being synchronous. The correlation method comprises the following steps: first correlations, over a plurality N of periods of the first spreading code, of the radio-navigation signal with the first spreading code; the selection, out of the N first correlations, of a subset containing a number M of correlations; and the coherent integration of the M correlations of the subset.

摘要翻译： 提供了一种用于将由第一扩展码调制的第一导频信号和由等于第一扩展码长度的第二主扩展码调制的第二数据信号组成的接收的卫星无线电导航信号相关联的方法， 所述第二数据信号被包括多个芯片的次级序列进一步调制，所述芯片的持续时间等于所述第二主扩展码的长度的倍数，所述第一导频信号和所述第二数据信号是同步的。 相关方法包括以下步骤：在具有第一扩展码的无线电导航信号的第一扩展码的多个N个周期中进行第一相关; 在N个第一相关中，选择包含M个相关的子集; 以及该子集的M个相关性的相干整合。

公开(公告)号：US20150139089A1

公开(公告)日：2015-05-21

申请号：US14227085

申请日：2014-03-27

申请人： Shahrnaz Azizi ,  Thomas J. Kenney ,  Eldad Perahia

发明人： Shahrnaz Azizi ,  Thomas J. Kenney ,  Eldad Perahia

IPC分类号： H04B1/76 ,  H04W4/00

CPC分类号： H04W72/044 ,  H04B7/0413 ,  H04B7/0452 ,  H04B17/336 ,  H04J11/00 ,  H04J2011/0096 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/0064 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2695 ,  H04L69/22 ,  H04W4/80 ,  H04W24/02 ,  H04W52/0216 ,  H04W52/0219 ,  H04W56/002 ,  H04W72/0413 ,  H04W72/0453 ,  H04W74/04 ,  H04W84/12 ,  Y02B70/30 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/22

摘要： Embodiments of a master station and method for high-efficiency Wi-Fi (HEW) communication using traveling pilots are generally described herein. In some embodiments, the master station is arranged for communicating with a plurality of HEW and may be configured to transmit, during an initial portion of an HEW control period, a master-sync transmission that includes a multi-device HEW preamble arranged to signal and identify data fields for a plurality of scheduled HEW stations. The master station may transmit during the HEW control period the data fields with traveling pilots to the scheduled HEW stations. The master station may also receive data fields with traveling pilots transmitted by the scheduled HEW stations during the HEW control period. The traveling pilots may comprise pilot signals that are shifted among orthogonal-frequency multiplexed (OFDM) subcarriers during transmission of one or more of the data fields.

摘要翻译： 这里一般地描述使用移动导频的用于高效Wi-Fi（HEW）通信的主站和方法的实施例。 在一些实施例中，主站被布置为与多个HEW进行通信，并且可以被配置为在HEW控制周期的初始部分期间发送主同步传输，该主同步传输包括布置成信号的多设备HEW前导码 识别多个调度的HEW站的数据字段。 主站可以在HEW控制周期期间将具有旅行飞行员的数据字段发送到预定的HEW站。 在HEW控制周期期间，主站还可以接收由调度的HEW站发送的行驶导频的数据字段。 行驶导频可以包括在一个或多个数据字段的传输期间在正交频分复用（OFDM）子载波之间移位的导频信号。

公开(公告)号：US20080291978A1

公开(公告)日：2008-11-27

申请号：US11751109

申请日：2007-05-21

申请人： Elias Jonsson ,  Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Stephen J. Grant

发明人： Elias Jonsson ,  Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Stephen J. Grant

IPC分类号： H04B1/76 ,  H04B1/69

CPC分类号： H04B1/712 ,  H04B7/0634 ,  H04B2201/709727

摘要： A parametric form of G-Rake and chip equalization for closed-loop transmit diversity is provided, that accounts for impairment correlation between transmit antennas. In a closed-loop transmit diversity system, the base station transmits a signal from two or more antennas, using one of a predetermined set of relative phase offsets at one of the antennas. The parametric estimation of the impairment or data covariance is performed by summing terms, including a term for each possible phase offset. The terms are weighted by fitting parameters. The fitting parameters are jointly solved by fitting the impairment or data covariance estimate to a measured impairment or data covariance. In another aspect, a measured impairment covariance is formed by exploiting a special relationship between the pilot channels of the different transmit antennas.

摘要翻译： 提供了用于闭环发射分集的G-Rake和码片均衡的参数形式，其考虑了发射天线之间的损害相关性。 在闭环发射分集系统中，基站使用在天线之一处的预定相对相位偏移集合中的一个从两个或多个天线发射信号。 损伤或数据协方差的参数估计是通过求和术语来执行的，包括每个可能的相位偏移的项。 这些术语通过拟合参数加权。 拟合参数通过将损伤或数据协方差估计拟合为测量的损伤或数据协方差来共同解决。 在另一方面，通过利用不同发射天线的导频信道之间的特殊关系来形成测量的损害协方差。

公开(公告)号：US07342912B1

公开(公告)日：2008-03-11

申请号：US10187026

申请日：2002-06-28

申请人： Adam B. Kerr ,  Erik D. Lindskog ,  Christopher Brunner ,  Mitchell D. Trott

发明人： Adam B. Kerr ,  Erik D. Lindskog ,  Christopher Brunner ,  Mitchell D. Trott

IPC分类号： H04B7/212 ,  H04B1/76

CPC分类号： H04B7/0615 ,  H04L25/0224

摘要： A method and apparatus are provided that optimizes a transmitted user-specific signal. In one embodiment, the invention includes receiving signals from a remote radio, deriving estimates of receive channels corresponding to the received signals using the received signals, deriving a model of an expected transmit channel to the remote radio based on the receive channel estimates, deriving a set of transmit parameters to be applied to an array of transmit antennas to transmit a signal to the remote radio by optimizing a transmit power criteria using the model of the expected transmit channel and constraints on the estimated quality of a signal transmitted over the expected transmit channel, and transmitting to the remote radio by applying the derived set of transmit parameters to the transmit antenna array.

摘要翻译： 提供了一种优化发送的用户特定信号的方法和装置。 在一个实施例中，本发明包括从远程无线电接收信号，使用接收到的信号导出对应于接收信号的接收信道的估计，基于接收信道估计导出到远程无线电的期望发射信道的模型，导出 通过使用预期发射信道的模型优化发射功率标准并对通过预期发射信道传输的信号的估计质量的约束来将应用于发射天线阵列的发射参数集合发射到远程无线电信号。 并且通过将衍生的发射参数集合应用于发射天线阵列来发射到远程无线电装置。

公开(公告)号：US20050123034A1

公开(公告)日：2005-06-09

申请号：US10979829

申请日：2004-11-01

申请人： Yong Lee ,  Jong Kim

发明人： Yong Lee ,  Jong Kim

IPC分类号： H04N7/015 ,  H03K5/159 ,  H04B1/76 ,  H04J1/00 ,  H04L25/02 ,  H04L25/03 ,  H04L27/02 ,  H04N5/44

CPC分类号： H04L25/03146 ,  H04L2025/03382 ,  H04L2025/0349 ,  H04L2025/03509 ,  H04L2025/03605 ,  H04L2025/0377

摘要： A method of initializing en equalizer of VSB DTV receiver and an equalizer using the same are provided. The method includes the steps of: obtaining a channel estimation value by estimating an impulse response of a channel from a received signal, initializing the backward filter by using the channel estimation value; generating an imaginary training signal by an arithmetical operation for the channel estimation value and an generated known training sequence; and initializing the forward filter by using the imaginary training signal.

摘要翻译： 提供了一种初始化VSB DTV接收机的均衡器和使用其的均衡器的方法。 该方法包括以下步骤：通过从接收信号估计信道的脉冲响应，通过使用信道估计值初始化反向滤波器来获得信道估计值; 通过用于信道估计值和生成的已知训练序列的算术运算来产生虚拟训练信号; 并使用虚拟训练信号初始化正向滤波器。

公开(公告)号：US6002716A

公开(公告)日：1999-12-14

申请号：US952832

申请日：1997-11-25

申请人： Raimund Meyer ,  Robert Fischer ,  Wolfgang Gerstacker ,  Johannes Huber ,  Peter Schramm

发明人： Raimund Meyer ,  Robert Fischer ,  Wolfgang Gerstacker ,  Johannes Huber ,  Peter Schramm

IPC分类号： H04L27/01 ,  H04B1/76 ,  H04B7/005 ,  H04L12/28 ,  H04L25/02 ,  H03H7/30

CPC分类号： H04L12/5692 ,  H04L25/0236

摘要： A digital transmission system comprising a receiver, the receiver including a receiver input stage and a digital memory for storing a sequence of binary symbols of sample values, formed in the receiver input stage, of a signal distorted by a transmission channel, and an equalizer for forming a sequence of binary estimates from the sample values by an impulse response of a substitute system describing the transmission channel, the impulse response being determined by first correlations of coefficients of a known training sequence with the sample values of a part of the known training sequence extended by at least one binary symbol. To make a channel estimation possible for a higher degree of the impulse response of the transmission channel, and also to carry out the channel estimation always with a maximum quality, a variable first correlation window size and a variable number of first correlations are used for adapting the impulse response of the substitute system to the impulse response of the transmission channel. A reduction of the correlation window size enables more cross-correlation values to be formed with one sequence of sample values, so that an increase of the degree of the impulse response of the estimated transmission channel becomes possible. With a more favorable transmission behavior, the correlation window size can be extended by one or more known binary symbols, so that the quality of the estimate of the impulse response is enhanced.

摘要翻译： PCT No.PCT / IB97 / 00360 Sec。 371日期：1997年11月25日 102（e）1997年11月25日PCT PCT 1997年4月7日提交PCT公布。 第WO97 / 39536号公报 日期1997年10月23日一种数字传输系统，包括接收机，接收机包括接收机输入级和数字存储器，用于存储在接收机输入级中形成的采样值的二进制符号序列的由传输信道失真的信号 以及均衡器，用于通过描述传输信道的替代系统的脉冲响应从采样值形成二进制估计序列，所述脉冲响应由已知训练序列的系数的第一相关性与部分的样本值确定 已知训练序列由至少一个二进制符号扩展。 为了对传输信道的较高程度的脉冲响应进行信道估计，并且始终以最大质量执行信道估计，可以使用可变的第一相关窗口大小和可变数量的第一相关来适应 替代系统对传输信道的脉冲响应的脉冲响应。 相关窗口尺寸的减小使得能够用一个采样值序列形成更多的互相关值，使得估计的传输信道的脉冲响应程度的增加成为可能。 利用更有利的传输行为，可以通过一个或多个已知二进制符号来扩展相关窗口大小，从而提高脉冲响应的估计质量。

公开(公告)号：US5901185A

公开(公告)日：1999-05-04

申请号：US631141

申请日：1996-04-15

申请人： Amer Hassan

发明人： Amer Hassan

IPC分类号： H04L27/22 ,  H04B1/76 ,  H04B7/005 ,  H04B7/15 ,  H04L25/03 ,  H04Q7/38 ,  H04B1/10

CPC分类号： H04L25/03171

摘要： Radiotelephone communications, such as voice or data, are processed to produce a pilot symbol assisted modulation (PSAM) communications symbol sequence, the PSAM communications symbol sequence including a plurality of predetermined pilot symbols interleaved with a plurality of information symbols representing the radiotelephone communications. The PSAM communications symbol sequence is communicated over a radiotelephone communications channel having a transfer characteristic, producing a sequence of communications symbol data representing the communicated sequence of communication symbols. Pilot symbol data, corresponding to pilot symbols, and information symbol data, corresponding to information symbols, are identified in the sequence of communications symbol data. A data-augmented estimate of the transfer characteristic of the radiotelephone communications channel is generated from the pilot symbol data and the information symbol data. Estimates of information symbols are generated from the corresponding information symbol data and the generated estimate of the transfer characteristic. Radiotelephone communications are decoded from the generated estimates of the information symbols. Preferably, estimates of the transfer characteristic are iteratively generated by identifying a group of information symbol data corresponding to a group of information symbols, generating estimates of the group of identified information symbols from the group of information symbol data and a previously generated estimate of the radiotelephone communications channel transfer characteristic, and generating a new estimate of the transfer characteristic from the pilot symbol data, the information symbol data, and previously generated estimates of information symbols.

摘要翻译： 诸如语音或数据的无线电话通信被处理以产生导频符号辅助调制（PSAM）通信符号序列，PSAM通信符号序列包括与表示无线电话通信的多个信息符号交错的多个预定导频符号。 PSAM通信符号序列通过具有传输特性的无线电话通信信道进行通信，产生表示所传送的通信符号序列的通信符号数据序列。 对应于导频符号的导频符号数据和对应于信息符号的信息符号数据在通信符号数据的序列中被识别。 从导频符号数据和信息符号数据生成无线电话通信信道的传输特性的数据增强估计。 从相应的信息符号数据和生成的传送特性的估计值生成信息符号的估计。 从产生的信息符号的估计中解码无线电话通信。 优选地，通过识别与一组信息符号相对应的一组信息符号数据来迭代地生成传输特性的估计，从信息符号数据组生成所识别的信息符号组的估计和先前产生的无线电话估计 通信信道传输特性，以及从导频符号数据，信息符号数据和先前产生的信息符号估计值生成传输特性的新估计。

公开(公告)号：US5748038A

公开(公告)日：1998-05-05

申请号：US873872

申请日：1997-06-12

申请人： Dragan Boscovic ,  Stephen Valentine ,  Babak Bastani ,  Anthony Wray

发明人： Dragan Boscovic ,  Stephen Valentine ,  Babak Bastani ,  Anthony Wray

IPC分类号： H03G3/20 ,  H03F1/32 ,  H03F1/34 ,  H04B1/76 ,  H03G3/30

CPC分类号： H03F1/3247 ,  H03F1/345 ,  H03F2201/3233

摘要： A method for amplitude training for a power amplifier is described employing adaptively changing an input training signal of a feedback circuit.

摘要翻译： PCT No.PCT / EP95 / 00753 Sec。 371日期1995年12月26日第 102（e）日期1995年12月26日PCT 1995年3月2日PCT公布。 第WO95 / 24765号公报 日期1995年9月14日利用自适应地改变反馈电路的输入训练信号来描述功率放大器的振幅训练方法。

公开(公告)号：US5652766A

公开(公告)日：1997-07-29

申请号：US281930

申请日：1994-07-28

申请人： Noboru Matsumura ,  Kazuaki Okuyama ,  Mitsuru Kashimura

发明人： Noboru Matsumura ,  Kazuaki Okuyama ,  Mitsuru Kashimura

IPC分类号： G06F13/38 ,  G06F3/147 ,  G08C19/28 ,  H04B1/76 ,  H04L12/951 ,  H04L12/955 ,  H04L29/02 ,  H04L27/04

CPC分类号： G08C19/28 ,  G06F3/147

摘要： A two-way transmitting apparatus which transmits display data and audio signal from an audio reproducing device to a remote controller and headphones with display by wireless transmitting, and transmits control signals to the audio reproducing apparatus according to one of the operation of a plurality of operation unit established on the remote controller and the headphones. The control data is divided into a predetermined number of blocks, the discrimination code "d" is inserted between respective blocks to generate the data sequence, and the data length per unit block is set to most approximate to the value of square root of the control data length.

摘要翻译： 一种双向发送装置，其通过无线发送将显示数据和音频信号从音频再现装置发送到遥控器和耳机，并且根据多个操作中的一个操作向控制信号发送控制信号 在遥控器和耳机上建立的单元。 控制数据被划分成预定数量的块，在各块之间插入鉴别代码“d”以产生数据序列，并且将每单位块的数据长度设置为最接近于控制的平方根值 数据长度。

公开(公告)号：US5631921A

公开(公告)日：1997-05-20

申请号：US471316

申请日：1995-05-17

申请人： Donald L. Schilling

发明人： Donald L. Schilling

IPC分类号： H04B1/707 ,  H04B1/7075 ,  H04B1/709 ,  H04B7/005 ,  H04B1/69 ,  H04B1/76 ,  H04Q7/22

CPC分类号： H04W52/221 ,  H04B1/707 ,  H04B1/7075 ,  H04W52/225 ,  H04W52/228 ,  H04W52/52 ,  H04B1/709

摘要： An apparatus for adaptive-power control of a spread-spectrum transmitter of a mobile station operating in a cellular-communications network using spread-spectrum modulation. A base station transmits a first spread-spectrum signal. A mobile station has an automatic-gain-control circuit for generating an AGC-output signal, from a received signal. The received signal includes the first spread-spectrum signal and an interfering signal. The mobile station also has a correlator for despreading the AGC-output signal, a power-measurement circuit responsive to processing the received signal with the despread AGC-output signal for generating a received-power level, a comparator coupled to the power-measurement circuit for generating a comparison signal by comparing the received-power level to a threshold level, a transmitter for transmitting a second spread-spectrum signal, an antenna, and a variable-gain device responsive to the comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal.

摘要翻译： 一种用于使用扩频调制在蜂窝通信网络中操作的移动台的扩频发射机的自适应功率控制的装置。 基站发送第一扩频信号。 移动台具有用于从接收信号产生AGC输出信号的自动增益控制电路。 所接收的信号包括第一扩频信号和干扰信号。 移动台还具有用于解扩AGC输出信号的相关器，响应于利用用于产生接收功率电平的解扩AGC输出信号处理接收信号的功率测量电路，耦合到功率测量电路的比较器 用于通过将接收功率电平与阈值电平进行比较来产生比较信号;响应于比较信号发送第二扩频信号的发射机，天线和可变增益装置，用于调整发射机功率电平 第二扩频信号。