公开(公告)号：US09537683B1

公开(公告)日：2017-01-03

申请号：US14876246

申请日：2015-10-06

申请人： Mahdi Zamani ,  Hossein Najafi ,  Demin Yao ,  Jeebak Mitra ,  Chuandong Li ,  Zhuhong Zhang

发明人： Mahdi Zamani ,  Hossein Najafi ,  Demin Yao ,  Jeebak Mitra ,  Chuandong Li ,  Zhuhong Zhang

IPC分类号： H03D1/00 ,  H04L27/06 ,  H04L25/03 ,  H04L27/26

CPC分类号： H04L25/03273 ,  H04L25/03203 ,  H04L27/0014 ,  H04L27/2275 ,  H04L27/3836 ,  H04L2027/0038

摘要： A method and apparatus for performing residual phase noise compensation is described. A coarse carrier compensation of a received modulated signal is performed to obtain a coarse carrier compensated signal and a trellis-based residual carrier recovery is performed to estimate a residual phase noise of the coarse carrier compensated signal. The coarse carrier compensated signal is compensated based on the estimated residual phase noise.

摘要翻译： 描述了执行剩余相位噪声补偿的方法和装置。 执行接收的调制信号的粗略载波补偿以获得粗略的载波补偿信号，并且执行基于网格的残余载波恢复以估计粗略载波补偿信号的残余相位噪声。 基于估计的残余相位噪声补偿粗略载波补偿信号。

公开(公告)号：US08983010B2

公开(公告)日：2015-03-17

申请号：US14225137

申请日：2014-03-25

申请人： Anchor Hill Communications, LLC

发明人： Eric Jacobsen

IPC分类号： H03D1/00 ,  H04L27/06 ,  H04L27/01 ,  H04L25/03 ,  H04L27/00

CPC分类号： H04L27/01 ,  H04L25/03057 ,  H04L25/03318 ,  H04L2027/0038

摘要： Briefly, in accordance with one or more embodiments, in response to receiving a single carrier signal that is not phase locked, channel equalization may be applied to the signal via a channel equalizer. The equalized signal may be phase averaged to provide a signal that is at least partially phase stabilized. The channel equalizer may then be trained by feeding back the at least partially phase stabilized phase reference to the channel equalizer. The resulting signal may then be decoded via coherent or quasi-coherent detection.

摘要翻译： 简而言之，根据一个或多个实施例，响应于接收到不锁相的单载波信号，信道均衡可以经由信道均衡器施加到信号。 均衡信号可以相位平均以提供至少部分相位稳定的信号。 然后可以通过将至少部分相位稳定的相位基准反馈到信道均衡器来训练信道均衡器。 然后可以通过相干或准相干检测来对结果信号进行解码。

公开(公告)号：US08897412B2

公开(公告)日：2014-11-25

申请号：US13714530

申请日：2012-12-14

申请人： Thushara Hewavithana ,  Bernard Arambepola

发明人： Thushara Hewavithana ,  Bernard Arambepola

IPC分类号： H04B1/10 ,  H04L27/01 ,  H04L27/26

CPC分类号： H04L27/01 ,  H04L27/2647 ,  H04L27/3836 ,  H04L2027/0038 ,  H04L2027/0087

摘要： An approach is provided to mitigate phase noise by correcting common phase error and inter-carrier-interference in a received signal. The approach involves determining a received signal includes phase noise comprising at least a common phase error component and an inter-carrier-interference component. The approach also involves causing the common phase error to be corrected based on one or more pilot carriers. The approach further involves causing an estimate of a main signal component to be subtracted from the one or more pilot carriers. The approach additionally involves determining a sequence of estimated coefficients of a multiplicative phase noise sequence. The approach also involves causing the inter-carrier-inference to be corrected by processing the multiplicative phase noise sequence using the sequence of estimated coefficients. The approach further involves causing an equalized data signal to be output based on the corrected common phase error and the corrected inter-carrier-interference.

摘要翻译： 提供了一种通过校正接收信号中的公共相位误差和载波间干扰来减轻相位噪声的方法。 该方法包括确定接收信号包括至少包括公共相位误差分量和载波间干扰分量的相位噪声。 该方法还涉及基于一个或多个导频载波来校正公共相位误差。 该方法还包括导致从一个或多个导频载波减去主信号分量的估计。 该方法还涉及确定乘法相位噪声序列的估计系数序列。 该方法还涉及通过使用估计系数的序列处理乘法相位噪声序列来使得载波间推理被校正。 该方法进一步包括使得基于校正的公共相位误差和校正的载波间干扰来输出均衡的数据信号。

公开(公告)号：US20140072024A1

公开(公告)日：2014-03-13

申请号：US13607245

申请日：2012-09-07

申请人： Nirmal C. Warke ,  Robert F. Payne ,  Gerd Schuppener ,  Brad Kramer

发明人： Nirmal C. Warke ,  Robert F. Payne ,  Gerd Schuppener ,  Brad Kramer

IPC分类号： H04L27/01

CPC分类号： H04L27/0014 ,  H04L27/2273 ,  H04L27/3818 ,  H04L2027/0032 ,  H04L2027/0036 ,  H04L2027/0038 ,  H04L2027/0057 ,  H04L2027/0069

摘要： A method is provided. A multi-amplitude signal is received and downconverted so as to generate I and Q signals using a local oscillator signal. The I and Q signals are equalized, and the equalized I and Q signals are digitized. First and second gains are adjusted with the second and first digital signals, respectively, and applied to the equalized I and Q signals, respectively. The difference between the first and second amplified signals is determined, and an error signal is generated from the difference between the first and second amplified signals. The local oscillator signal is then adjusted with the error signal.

摘要翻译： 提供一种方法。 多幅度信号被接收和下变频，以便使用本地振荡器信号产生I和Q信号。 I和Q信号被均衡，并且均衡的I和Q信号被数字化。 第一和第二增益分别用第二和第一数字信号进行调整，分别应用于均衡的I和Q信号。 确定第一和第二放大信号之间的差异，并且从第一和第二放大信号之间的差产生误差信号。 然后用误差信号调整本机振荡器信号。

公开(公告)号：US20130202022A1

公开(公告)日：2013-08-08

申请号：US13728876

申请日：2012-12-27

申请人： Huawei Technologies Co., Ltd.

发明人： Meng Cai

IPC分类号： H04L27/01

CPC分类号： H04L27/01 ,  H04L7/0058 ,  H04L7/033 ,  H04L25/0204 ,  H04L25/0242 ,  H04L25/03019 ,  H04L25/03273 ,  H04L2025/03426 ,  H04L2025/03611 ,  H04L2027/0038 ,  H04L2027/0065

摘要： A method and a device which are for signal processing and are applied to a microwave communication system are disclosed. The method includes: performing equalization processing on each input signal by using an equalizer so as to obtain an equalized signal corresponding to the each input signal; performing phase estimation on phase noise in the equalized signal to obtain an estimated phase of the phase noise; performing phase rotation on the equalized signal to offset the estimated phase of the phase noise, so as to obtain a phase rotation signal; suppressing residual phase noise in the phase rotation signal by using a phase-locked loop so as to output an error signal and a received signal; and performing an iterative update on a filter coefficient of the equalizer by using the error signal.

摘要翻译： 公开了一种用于信号处理并应用于微波通信系统的方法和装置。 该方法包括：通过使用均衡器对每个输入信号执行均衡处理，以获得对应于每个输入信号的均衡信号; 对均衡信号中的相位噪声执行相位估计，以获得相位噪声的估计相位; 在均衡信号上执行相位旋转以偏移相位噪声的估计相位，以获得相位旋转信号; 通过使用锁相环来抑制相位旋转信号中的残留相位噪声，以输出误差信号和接收信号; 以及通过使用误差信号对均衡器的滤波器系数执行迭代更新。

公开(公告)号：US20120314755A1

公开(公告)日：2012-12-13

申请号：US13589688

申请日：2012-08-20

申请人： Philip J. Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory S. Sternberg ,  Rui Yang ,  Bin Li

发明人： Philip J. Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory S. Sternberg ,  Rui Yang ,  Bin Li

IPC分类号： H04L27/01

CPC分类号： H04L25/03038 ,  H04B1/7097 ,  H04L27/0014 ,  H04L2025/03509 ,  H04L2025/03547 ,  H04L2025/03585 ,  H04L2025/03611 ,  H04L2025/03617 ,  H04L2025/03687 ,  H04L2027/003 ,  H04L2027/0038 ,  H04L2027/0065

摘要： An adaptive equalizer including an equalizer filter and a tap coefficients generator used to process a sample data stream derived from a plurality of received signals is disclosed. The tap coefficients generator includes an equalizer tap update unit, a vector norm square estimator, an active taps mask generator, a switch and a pilot amplitude reference unit used to minimize the dynamic range of the equalizer filter. A dynamic mask vector is used to mask active taps generated by the equalizer tap update unit when an unmasked signal output by the equalizer filter is selected by the switch to generate an error signal fed to the equalizer tap update unit. A fixed mask vector is used to mask active taps generated by the equalizer tap update unit when a masked signal output by the equalizer filter is used to generate the error signal.

摘要翻译： 公开了一种包括均衡器滤波器和用于处理从多个接收信号导出的采样数据流的抽头系数发生器的自适应均衡器。 抽头系数发生器包括均衡器抽头更新单元，矢量范数平方估计器，有源抽头掩码发生器，用于最小化均衡器滤波器的动态范围的开关和导频振幅参考单元。 当由开关选择由均衡器滤波器输出的未屏蔽信号以产生馈送到均衡器抽头更新单元的误差信号时，动态屏蔽矢量用于屏蔽均衡器抽头更新单元产生的有效抽头。 当使用由均衡器滤波器输出的屏蔽信号来产生误差信号时，固定屏蔽矢量用于屏蔽均衡器抽头更新单元产生的有源抽头。

公开(公告)号：US08266509B2

公开(公告)日：2012-09-11

申请号：US12507835

申请日：2009-07-23

申请人： Li Fung Chang ,  Yongqian Wang

发明人： Li Fung Chang ,  Yongqian Wang

IPC分类号： H03M13/03

CPC分类号： H04L1/0059 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1829 ,  H04L1/1835 ,  H04L1/1845 ,  H04L1/203 ,  H04L1/208 ,  H04L25/03006 ,  H04L25/03318 ,  H04L25/067 ,  H04L27/0008 ,  H04L2025/03401 ,  H04L2025/03407 ,  H04L2025/03726 ,  H04L2027/0038

摘要： A wireless device for implementing Incremental Redundancy (IR) operations includes an IR memory dedicated to storing data related to the IR operations. The IR memory includes a Type I IR memory adapted to store IR status information of a Radio Link Control (RLC) data block and a Type II IR memory adapted to store the RLC data block.

摘要翻译： 用于实现增量冗余（IR）操作的无线设备包括专用于存储与IR操作有关的数据的IR存储器。 IR存储器包括适于存储无线电链路控制（RLC）数据块的IR状态信息的I型IR存储器和适于存储RLC数据块的II型IR存储器。

公开(公告)号：US08204156B2

公开(公告)日：2012-06-19

申请号：US12317970

申请日：2008-12-31

申请人： Thushara Hewavithana ,  Bernard Arambepola ,  Parveen K. Shukla ,  Sahan S. Gamage ,  Vinesh Bhunjun

发明人： Thushara Hewavithana ,  Bernard Arambepola ,  Parveen K. Shukla ,  Sahan S. Gamage ,  Vinesh Bhunjun

IPC分类号： H04L27/00 ,  H03D3/22

CPC分类号： H04L27/3827 ,  H04L27/2273 ,  H04L2027/003 ,  H04L2027/0036 ,  H04L2027/0038 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0069

摘要： Apparatuses, systems, and methods that employ conditional probabilities to calculate phase errors are disclosed. For a received signal, the embodiments may develop several phase error estimates relative to each point of a constellation, the number and location of points of the constellation depending on the modulation technique of the received signal. In addition to calculating the phase error estimates, the embodiments may also calculate weights, or probabilities, associated with each of the estimates. The embodiments may use the estimates and the weights to calculate a composite phase error estimate. The composite phase error estimate may be used to correct the received signal and eliminate or reduce the impact of the phase error.

摘要翻译： 公开了使用条件概率来计算相位误差的装置，系统和方法。 对于接收到的信号，实施例可以根据接收信号的调制技术，相对于星座的每个点，星座的点的数量和位置来形成几个相位误差估计。 除了计算相位误差估计之外，实施例还可以计算与每个估计相关联的权重或概率。 实施例可以使用估计和权重来计算复合相位误差估计。 复合相位误差估计可以用于校正接收到的信号，并消除或减少相位误差的影响。

公开(公告)号：US20120087449A1

公开(公告)日：2012-04-12

申请号：US12979270

申请日：2010-12-27

申请人： CURTIS LING ,  TIMOTHY GALLAGHER

发明人： CURTIS LING ,  TIMOTHY GALLAGHER

IPC分类号： H04L25/08

CPC分类号： H04L27/2649 ,  H04L1/20 ,  H04L25/0204 ,  H04L27/2627 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2695 ,  H04L2027/003 ,  H04L2027/0038 ,  H04L2027/0067 ,  H04L2027/0075

摘要： Methods and apparatus for processing multichannel signals in a multichannel receiver are described. In one implementation, a plurality of demodulator circuits may provide a plurality of outputs to a processing module, with the processing module then simultaneously estimating noise characteristics based on the plurality of outputs and generating a common noise estimate based on the plurality of outputs. This common noise estimate may then be provided back the demodulators and used to adjust the demodulation of signals in the plurality of demodulators to improve phase noise performance.

摘要翻译： 描述了在多通道接收机中处理多信道信号的方法和装置。 在一个实现中，多个解调器电路可以向处理模块提供多个输出，处理模块然后基于多个输出同时估计噪声特性，并且基于多个输出生成公共噪声估计。 然后，可以将这种公共噪声估计提供给解调器，并用于调整多个解调器中的信号的解调以改善相位噪声性能。

公开(公告)号：US07885323B2

公开(公告)日：2011-02-08

申请号：US11878224

申请日：2007-07-23

申请人： Bruce J. Currivan ,  Loke Kun Tan ,  Thomas Joseph Kolze ,  Hanli Zou ,  Lin He

发明人： Bruce J. Currivan ,  Loke Kun Tan ,  Thomas Joseph Kolze ,  Hanli Zou ,  Lin He

IPC分类号： H03H7/30

CPC分类号： H04L25/03057 ,  H04L27/0014 ,  H04L2027/003 ,  H04L2027/0038 ,  H04L2027/0053

摘要： An apparatus is disclosed to compensate for non-linear effects resulting from the transmitter, the receiver, and/or the communication channel in a communication system. A receiver of the communication system contains an image cancellation module that compensates for images generated during the modulation and/or demodulation process. The image cancellation module includes a fine carrier correction loop to correct for frequency offsets between the transmitter and receiver. The image cancellation module includes a coarse acquisition mode and a decision directed mode. The decision directed mode allows for a larger signal-to-noise ratio for the receiver when compared against the coarse acquisition mode.

摘要翻译： 公开了一种用于补偿由通信系统中的发射机，接收机和/或通信信道产生的非线性效应的装置。 通信系统的接收机包含补偿在调制和/或解调过程中产生的图像的图像消除模块。 图像消除模块包括精确的载波校正环路，以校正发射机和接收机之间的频率偏移。 图像消除模块包括粗略采集模式和决策指导模式。 当与粗略采集模式进行比较时，决定导向模式允许接收机具有更大的信噪比。