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公开(公告)号：US20170026203A1
公开(公告)日：2017-01-26
申请号：US15283654
申请日：2016-10-03
发明人： Timothy Thomas , Mark Cudak
CPC分类号： H04L25/03305 , H04B17/0082 , H04B17/345 , H04L25/03006 , H04L25/03178 , H04L27/0014 , H04L27/22 , H04L2027/0016 , H04L2027/003 , H04L2027/0038 , H04L2027/0046 , H04L2027/0055 , H04L2027/0067 , H04L2027/0085 , H04W84/042
摘要： A group of data symbols for a current block of data symbols in multiple blocks received over a communication channel is equalized, based on a pilot block, to generate a group of equalized symbols. The group of equalized symbols is de-rotated as a function of a current phase estimate to determine initial de-rotated equalized symbols. The phase estimate is an estimate of phase caused by noise for blocks previous to the current block. Additionally, a phase metric is calculated from real and imaginary parts of the initial de-rotated equalized symbols, wherein the phase metric estimates phase caused by noise for the current block. The current phase estimate is updated with the phase metric. The initial de-rotated equalized symbols are de-rotated by the phase metric to determine final equalized and de-rotated symbol estimates. The final equalized and de-rotated symbol estimates are output. Apparatus, methods, and computer program products are disclosed.
摘要翻译： 基于导频块，在通过通信信道接收的多个块中的当前数据符号块的一组数据符号被均衡，以生成一组均衡的符号。 作为当前相位估计的函数，均衡符号组被去旋转以确定初始去旋转均衡符号。 相位估计是对当前块之前的块的噪声引起的相位的估计。 另外，根据初始去旋转均衡符号的实部和虚部来计算相位量度，其中相位度量估计由当前块的噪声引起的相位。 当前相位估计用相位量度更新。 初始去旋转的均衡符号通过相位度量被去旋转以确定最终的均衡和去旋转符号估计。 输出最终均衡和去旋转的符号估计。 公开了装置，方法和计算机程序产品。
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公开(公告)号：US20160381581A1
公开(公告)日：2016-12-29
申请号：US14835437
申请日：2015-08-25
CPC分类号： H04L5/0048 , H04L27/0014 , H04L27/22 , H04L2027/003 , H04L2027/0034 , H04L2027/0048 , H04L2027/0095 , H04W84/12
摘要： Methods and system for carrier frequency offset (CFO) estimation are described. The method includes determining correlation values between a plurality of samples from a received signal and a plurality of reference signals corresponding to a plurality of CFO candidates. A set of correlation values which exceeds a threshold is determined and a corresponding CFO candidate for each correlation value in the set is selected. A CFO estimate based on an interpolation of selected CFO candidates is then calculated.
摘要翻译： 描述载波频率偏移（CFO）估计的方法和系统。 该方法包括从接收到的信号和对应于多个CFO候选的多个参考信号确定多个样本之间的相关值。 确定超过阈值的一组相关值，并且选择该集合中的每个相关值的对应的CFO候选。 然后计算基于所选CFO候选的内插的CFO估计。
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公开(公告)号：US09509352B2
公开(公告)日：2016-11-29
申请号：US14925771
申请日：2015-10-28
发明人： Marek Klemes
CPC分类号： H04B1/123 , H04B1/10 , H04B1/1027 , H04L1/00 , H04L1/0036 , H04L27/0014 , H04L27/38 , H04L2025/0342 , H04L2027/0067
摘要： A noise cancellation method comprises receiving, by an adaptive phase-noise cancellation apparatus, a noise-corrupted symbol from a receiver, performing a hard decision process on the noise-corrupted symbol to generate a substantially clean symbol based upon the noise-corrupted symbol, calculating a phase deviation of the noise-corrupted symbol based upon the substantially clean symbol and the noise-corrupted symbol, generating a phase error based upon the phase deviation and transmitting, at an output of the adaptive phase-noise cancellation apparatus, a phase corrected symbol determined in accordance with a subtraction of the generated phase error from the received noise-corrupted symbol.
摘要翻译： 噪声消除方法包括：通过自适应相位噪声消除装置从接收机接收噪声损坏的符号，对噪声损坏的符号执行硬判决处理，以基于噪声损坏的符号产生基本上干净的符号， 基于基本上干净的符号和噪声损坏的符号来计算噪声损坏的符号的相位偏差，基于相位偏差产生相位误差，并在自适应相位噪声消除装置的输出处发送相位校正的相位误差 符号根据所接收到的噪声损坏符号的相位误差的减法而确定。
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44.发明申请公开(公告)号：US20160330064A1
公开(公告)日：2016-11-10
申请号：US15110451
申请日：2015-01-15
申请人： NEC CORPORATION
发明人： Norifumi KAMIYA , Eisaku SASAKI
CPC分类号： H04L27/3872 , H04L27/0014 , H04L2027/0067
摘要： To enable a large-capacity, high-quality data communication that is excellent in bit error rate characteristic even in an adverse noise environment mainly caused by phase noises or thermal noises. [Solution] Included are: a first phase error detection filter that generates, on the basis of a forward sequence of received symbols, a first phase difference value and a first phase error estimated value; a second phase error detection filter that generates, on the basis of a backward sequence of received symbols, a second phase difference value and a second phase error estimated value; a phase error combination means that generates a third phase error estimated value on the basis of the first and second phase error estimated values and one of the first and second phase difference values; and a phase error compensation means that compensates the phase error of the received symbols in accordance with the third phase error estimated value.
摘要翻译： 即使在主要由相位噪声或热噪声引起的不利噪声环境下，也能够实现出色性能优异的大容量，高质量的数据通信。 [解决方案]包括：第一相位误差检测滤波器，其基于接收符号的前向序列生成第一相位差值和第一相位误差估计值; 第二相位误差检测滤波器，其基于接收符号的反向序列生成第二相位差值和第二相位误差估计值; 相位误差组合装置，其基于第一和第二相位误差估计值和第一和第二相位差值之一产生第三相位误差估计值; 以及根据第三相位误差估计值补偿接收符号的相位误差的相位误差补偿装置。
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公开(公告)号：US20160308661A1
公开(公告)日：2016-10-20
申请号：US14686949
申请日：2015-04-15
发明人： Detlev Liebl
CPC分类号： H04L5/1461 , H04B1/0458 , H04B1/48 , H04L27/0014
摘要： The invention is related to a communication device and a method for wireless signal transmission. An interference reduction means is arranged in between a transmitting path and a receiving path. The interference reduction mean is a wideband interference reduction means which converts a signal from said transmitting path into an anti-phased signal to provide the anti-phased signal to said receiving path.
摘要翻译： 本发明涉及一种用于无线信号传输的通信设备和方法。 干扰减少装置设置在发送路径和接收路径之间。 干扰减少平均值是宽带干扰减少装置，其将来自所述发射路径的信号转换成反相信号，以将抗相位信号提供给所述接收路径。
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公开(公告)号：US20160291118A1
公开(公告)日：2016-10-06
申请号：US15005968
申请日：2016-01-25
申请人： Intel Corporation
发明人： Yuval Amizur
CPC分类号： G01S5/0226 , G01S5/0215 , G01S11/02 , H04B7/0456 , H04B7/06 , H04L27/0014 , H04W4/02
摘要： Described herein are techniques related to transmitter precoding for optimizing positioning performance. The techniques are directed to transmit signals with relatively higher transmission power, in a direction along the line of sight between the transmitter and the receiver, than signals transmitted in other directions. The techniques render the first signal arriving at the receiver, as it travels along the line of sight between the transmitter and the receiver, to have stronger signal strength than the signal strengths of other signals that travel through non-LoS paths to reach the receiver.
摘要翻译： 这里描述了与用于优化定位性能的发射机预编码有关的技术。 这些技术涉及在沿着发射机和接收机之间的视线的方向上具有相对更高的发射功率的信号，而不是在其它方向上传输的信号。 当技术沿着发射机和接收机之间的视线行进时，技术使第一个信号到达接收机，以具有比通过非LoS路径到达接收机的其他信号的信号强度更强的信号强度。
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公开(公告)号：US09455852B1
公开(公告)日：2016-09-27
申请号：US15077118
申请日：2016-03-22
申请人： TM IP HOLDINGS, LLC
发明人： Richard C. Gerdes
CPC分类号： H04L27/144 , H04J11/004 , H04L27/00 , H04L27/0008 , H04L27/0014 , H04L27/122
摘要： Methods, systems, and apparatus for detecting a center frequency of an input signal, the input signal including a carrier signal modulated with a modulation signal. Detecting a frequency of a second signal. Determining a difference signal between the center frequency of the input signal and the frequency of the second signal. Modifying the frequency of the second signal based on the difference signal to provide the carrier signal. And, outputting the carrier signal.
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公开(公告)号：US09450715B2
公开(公告)日：2016-09-20
申请号：US14808062
申请日：2015-07-24
发明人： Shaoliang Zhang , Fatih Yaman , Yoshihisa Inada
CPC分类号： H04L1/205 , H04L1/206 , H04L27/00 , H04L27/0014 , H04L27/2656 , H04L27/3827
摘要： A system for carrier phase recovery, including a receiver for receiving one or more frames of L symbols. A phase estimator performs carrier phase estimation for the received frames of L symbols, and the resulting carrier phase estimates are stored in a non-transitory computer-readable storage medium. One or more rotators de-rotates the received frames of L symbols by one or more of the carrier phase estimates, and a data processor calculates a sum of the outputs of the L de-rotated signals raised to an nth power, and determines a real part of the sum. A minimum determination device determines a minimum of the real part of the sum with respect to the carrier phase estimates, and phase unwrapping and multiplier removal is performed if a minimum has been determined.
摘要翻译： 一种用于载波相位恢复的系统，包括用于接收一个或多个L个符号帧的接收机。 相位估计器对接收的L个符号的帧执行载波相位估计，并且所得到的载波相位估计被存储在非暂时的计算机可读存储介质中。 一个或多个旋转器通过载波相位估计中的一个或多个使L个符号的接收帧去旋转，并且数据处理器计算升高到第n个功率的L个去旋转信号的输出的和，并且确定真实的 总和的一部分。 最小确定装置确定相对于载波相位估计的总和的实部的最小值，并且如果已经确定了最小值，则执行相位展开和乘法器去除。
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公开(公告)号：US09450629B2
公开(公告)日：2016-09-20
申请号：US13104378
申请日：2011-05-10
申请人： Mark M. Cloutier
CPC分类号： H04B1/30 , H03C2200/0058 , H03C2200/0079 , H04L27/0014 , H04L27/364 , H04L2027/0018
摘要： A method for controlling local oscillator (LO) feed-through in a direct transmitter includes detecting a signal level corresponding to LO feed-through in a radio frequency (RF) signal that is output by a direct transmitter. Responsive to detecting the signal level corresponding to LO feed-through, DC offset levels are modified for an in-phase (I) signal and/or a quadrature-phase (Q) signal in the direct transmitter.
摘要翻译： 用于在直接发射机中控制本地振荡器（LO）馈通的方法包括检测由直接发射机输出的射频（RF）信号中与LO馈通相对应的信号电平。 响应于检测对应于LO馈通的信号电平，对于直接发射机中的同相（I）信号和/或正交相（Q）信号，DC偏移电平被修改。
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公开(公告)号：US09444664B2
公开(公告)日：2016-09-13
申请号：US14035873
申请日：2013-09-24
发明人： Zihuan Chen , Dafeng Tian , Xiaodong Li , Qiao Liu
CPC分类号： H04L27/0014 , H04L25/0202 , H04L2027/004 , H04L2027/0067
摘要： Embodiments of the present invention provide a method, includes: performing channel estimation on a signal of a current channel to obtain channel information of the current channel, performing calculation processing on the channel information obtained in current channel estimation and channel information obtained in previous channel estimation to obtain a phase difference of the current channel information, dividing the phase difference of the current channel information by a time interval between two times of channel estimation to obtain residual frequency offset information of the current channel, adding the residual frequency offset information of the current channel and frequency offset information which is of the channel and obtained in a previous calculation to obtain frequency offset information of the current channel, and outputting the frequency offset information of the current channel, so as to perform frequency offset correction on the signal of the channel according to the current frequency offset information.
摘要翻译： 本发明的实施例提供一种方法，包括：对当前信道的信号进行信道估计，以获得当前信道的信道信息，对在当前信道估计中获得的信道信息进行计算处理，并在先前信道估计中获得的信道信息 为了获得当前信道信息的相位差，将当前信道信息的相位差除以两次信道估计之间的时间间隔，以获得当前信道的剩余频率偏移信息，将当前信道的剩余频率偏移信息相加 通道和频率偏移信息，以获得当前通道的频率偏移信息，并输出当前通道的频率偏移信息，以便对通道的信号进行频率偏移校正 根据 当前频率偏移信息。
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