公开(公告)号：US4813073A

公开(公告)日：1989-03-14

申请号：US69250

申请日：1987-07-02

申请人： Fuyun Ling

发明人： Fuyun Ling

IPC分类号： H04B3/23 ,  H04L5/14

CPC分类号： H04B3/232 ,  H04B3/237 ,  H04B3/238

摘要： Echo cancellation to remove, from a locally received data communication signal, an echo signal component having a changing phase difference relative to the phase of a locally transmitted data communication signal, said locally transmitted communication signal are generated by modulating a carrier based on sequences of complex data signal points, is accomplished by correcting the phase of an input sequence of complex samples of the modulated carrier based on the changing phase difference to generate complex phase corrected samples, and generating a real-valued simulation of the echo signal based on the complex, phase corrected samples. Another aspect is estimating the phase difference between two signals based on samples of the real signal component of one of the signals, and the real component of the difference between the signals; successive estimates of the phase difference are generated based on successive applications of an approximate Hilbert transform to samples of each of the real signal component of one of the signals, and to the samples of the real component of the difference between the signals, each application of the Hilbert transform being limited to two of the samples. Another aspect is averaging a succession of sample values and scaling the result of the averaging in accordance with a variable scaling factor; the succession of sample values is accumulated as a cumulative sample value, and an output indicative of the result is provided by comparing the cumulative sample value with a threshold that is based on the variable scaling factor.

公开(公告)号：US08839079B2

公开(公告)日：2014-09-16

申请号：US13589651

申请日：2012-08-20

申请人： Jinghu Chen ,  Wanlun Zhao ,  Michael Mingxi Fan ,  Fuyun Ling ,  Peter John Black ,  Krishna Kiran Mukkavilli ,  Weihong Jing ,  Jia Tang

发明人： Jinghu Chen ,  Wanlun Zhao ,  Michael Mingxi Fan ,  Fuyun Ling ,  Peter John Black ,  Krishna Kiran Mukkavilli ,  Weihong Jing ,  Jia Tang

IPC分类号： H03M13/00 ,  H04L1/00

CPC分类号： H04L1/0051 ,  H04L1/0053 ,  H04L1/0066 ,  H04L1/20

摘要： The present disclosure describes methods and apparatuses for improved transport block decoding in devices capable of wireless communication, which may include user equipment and network entities. For example, the present disclosure presents methods and apparatuses for decoding a code block from a plurality of code blocks corresponding to a transport block, obtaining a reliability indicator that identifies a reliability of the decoding of the code block, comparing the reliability indicator to a reliability threshold, and determining whether to decode a subsequent code block from the plurality of code blocks based on the comparing. Furthermore, these methods and apparatuses may include determining not to decode at least one subsequent code block of the transport block where the comparing indicates that the reliability indicator is less than the reliability threshold. As such, device power is not unnecessarily consumed by decoding likely superfluous code blocks.

摘要翻译： 本公开描述了用于在能够进行无线通信的设备中改进传输块解码的方法和装置，其可以包括用户设备和网络实体。 例如，本公开提供了用于从对应于传输块的多个代码块中解码代码块的方法和装置，获得识别代码块的解码的可靠性的可靠性指示符，将可靠性指示符与可靠性进行比较 阈值，并且基于所述比较来确定是否从所述多个代码块解码后续代码块。 此外，这些方法和装置可以包括确定不解码传输块的至少一个后续码块，其中比较指示可靠性指示符小于可靠性阈值。 因此，通过解码可能的多余代码块，不会不必要地消耗器件功率。

公开(公告)号：US20140036698A1

公开(公告)日：2014-02-06

申请号：US13565316

申请日：2012-08-02

申请人： Wanlun Zhao ,  Fuyun Ling ,  Mingxi Fan ,  Jinghu Chen

发明人： Wanlun Zhao ,  Fuyun Ling ,  Mingxi Fan ,  Jinghu Chen

IPC分类号： H04W24/02

CPC分类号： H04W24/02 ,  H04L25/03133

摘要： A method of wireless communication includes receiving a wireless signal at a linear receiver, and iteratively computing an inverted covariance matrix in frequency domain, one channel code at a time. The method also includes computing receiver demodulation coefficients based on the inverted covariance matrix and the frequency domain channel estimate or time domain channel estimate. The method further includes deriving a transmitter symbol based on a received signal vector and the coefficients.

摘要翻译： 一种无线通信方法包括在线性接收机处接收无线信号，并且一次迭代地计算频域中的反向协方差矩阵，一个信道码。 该方法还包括基于反协方差矩阵和频域信道估计或时域信道估计来计算接收机解调系数。 该方法还包括基于接收信号向量和系数导出发射机符号。

公开(公告)号：US20130235956A1

公开(公告)日：2013-09-12

申请号：US13540974

申请日：2012-07-03

申请人： Qiang Shen ,  Fuyun Ling ,  Aamod Dinkar Khandekar ,  Sequei Anatolievich Glazko ,  Insung Kang ,  Ming Kang ,  Dario Fertonani ,  Yuheng Huang

发明人： Qiang Shen ,  Fuyun Ling ,  Aamod Dinkar Khandekar ,  Sequei Anatolievich Glazko ,  Insung Kang ,  Ming Kang ,  Dario Fertonani ,  Yuheng Huang

IPC分类号： H04L25/03

CPC分类号： H04L25/0391 ,  H04B7/2618 ,  H04L25/0244

摘要： In wireless communication systems, received signal estimation and detection is computationally intensive. During such processing, received signal matrices may be conditioned prior to inversion to improve stability. In particular, code domain conditioning, followed by time domain conditioning prior to inversion results in improved receiver performance. Such code and time domain conditioning may be particularly suited to a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system where code values are not averaged out of a received signal matrix.

摘要翻译： 在无线通信系统中，接收信号估计和检测是计算密集型的。 在这种处理期间，接收信号矩阵可以在反转之前被调节以提高稳定性。 特别地，代码域调节，随后在反转之前的时域调节导致改进的接收机性能。 这样的代码和时域调节可能特别适合于其中码值不从接收信号矩阵中进行平均的时分同步码分多址（TD-SCDMA）系统。

公开(公告)号：US08488706B2

公开(公告)日：2013-07-16

申请号：US12559318

申请日：2009-09-14

申请人： John W. Ketchum ,  Steven J. Howard ,  Jay Rod Walton ,  Mark S. Wallace ,  Fuyun Ling

发明人： John W. Ketchum ,  Steven J. Howard ,  Jay Rod Walton ,  Mark S. Wallace ,  Fuyun Ling

IPC分类号： H04B7/02

CPC分类号： H04W52/346 ,  H04L1/0009 ,  H04L1/0068 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/06 ,  H04L25/03343 ,  H04L2001/0096 ,  H04W52/24 ,  H04W52/42

摘要： Techniques to process data for transmission over a set of transmission channels selected from among all available transmission channels. In an aspect, the data processing includes coding data based on a common coding and modulation scheme to provide modulation symbols and pre-weighting the modulation symbols for each selected channel based on the channel's characteristics. The pre-weighting may be achieved by “inverting” the selected channels so that the received SNRs are approximately similar for all selected channels. With selective channel inversion, only channels having SNRs at or above a particular threshold are selected, “bad” channels are not used, and the total available transmit power is distributed across only “good” channels. Improved performance is achieved due to the combined benefits of using only the NS best channels and matching the received SNR of each selected channel to the SNR required by the selected coding and modulation scheme.

摘要翻译： 用于处理数据以在从所有可用传输信道中选择的一组传输信道上进行传输的技术。 在一方面，数据处理包括基于公共编码和调制方案的编码数据，以提供调制符号并且基于该信道的特征对每个所选择的信道预先加权调制符号。 预加权可以通过“反转”所选择的信道来实现，使得接收的SNR对于所有选择的信道大致相似。 通过选择性信道反转，仅选择具有等于或高于特定阈值的SNR的信道，不使用“坏”信道，并且总可用发射功率仅在“良好”信道上分布。 由于仅使用NS最佳通道并将每个所选信道的接收SNR与所选择的编码和调制方案所需的SNR相匹配的优点，可以实现改进的性能。

公开(公告)号：US08401503B2

公开(公告)日：2013-03-19

申请号：US11358996

申请日：2006-02-21

申请人： Seong Taek Chung ,  Vinay Murthy ,  Alok Kumar Gupta ,  Fuyun Ling

发明人： Seong Taek Chung ,  Vinay Murthy ,  Alok Kumar Gupta ,  Fuyun Ling

IPC分类号： H04B1/18

CPC分类号： H03J7/04 ,  H03J1/0083

摘要： Techniques for performing frequency control using dual-loop automatic frequency control (AFC) are described. The dual-loop AFC includes an inner loop that corrects short-term frequency variations (e.g., due to Doppler effect) and an outer loop that corrects long-term frequency variations (e.g., due to component tolerances and temperature variations). In one design, a first inner loop is implemented for frequency control of a first system (e.g., a broadcast system), a second inner loop is implemented for frequency control of a second system (e.g., a cellular system), and at least one outer loop is implemented for adjusting a reference frequency used to receive signals from the first and second systems. Each inner loop estimates and corrects the frequency error in an input signal for the associated system and may be enabled when receiving the input signal from the system. The reference frequency may be used for frequency downconversion, sampling and/or other purposes.

摘要翻译： 描述了使用双回路自动频率控制（AFC）进行频率控制的技术。 双回路AFC包括校正短期频率变化（例如，由于多普勒效应引起的）的内部循环和校正长期频率变化（例如由于部件公差和温度变化）的外部回路。 在一种设计中，为第一系统（例如，广播系统）的频率控制实现第一内环，为第二系统（例如，蜂窝系统）的频率控制实现第二内环，并且至少一个 实现外部环路，用于调整用于从第一和第二系统接收信号的参考频率。 每个内循环估计和校正相关系统的输入信号中的频率误差，并且当从系统接收输入信号时可以使能频率误差。 参考频率可用于下变频，采样和/或其他目的。

公开(公告)号：US08325856B2

公开(公告)日：2012-12-04

申请号：US11860505

申请日：2007-09-24

申请人： Raghuraman Krishnamoorthi ,  Tao Tian ,  Fuyun Ling ,  Yuheng Huang

发明人： Raghuraman Krishnamoorthi ,  Tao Tian ,  Fuyun Ling ,  Yuheng Huang

IPC分类号： H04L27/06

CPC分类号： H04L27/2675 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/261 ,  H04L27/2655

摘要： An acquisition module includes a coherent correlator configured to receive a transmission having a pilot signal and correlate the received transmission with a local copy of the pilot signal to produce a first output, a delayed correlator configured to delay the first output and correlate the first output with the delayed first output to produce a second output, and a detector configured to detect the pilot signal in the transmission based on the second output.

摘要翻译： 获取模块包括相干相关器，其被配置为接收具有导频信号的传输并将接收到的传输与导频信号的本地副本相关联以产生第一输出，延迟相关器被配置为延迟第一输出并将第一输出与 延迟的第一输出以产生第二输出;以及检测器，被配置为基于所述第二输出来检测所述传输中的导频信号。

公开(公告)号：US08040965B2

公开(公告)日：2011-10-18

申请号：US12499951

申请日：2009-07-09

申请人： John W. Ketchum ,  Steven J. Howard ,  Jay Rod Walton ,  Mark S. Wallace ,  Fuyun Ling

发明人： John W. Ketchum ,  Steven J. Howard ,  Jay Rod Walton ,  Mark S. Wallace ,  Fuyun Ling

IPC分类号： H04L27/28

CPC分类号： H04W52/346 ,  H04L1/0009 ,  H04L1/0068 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/06 ,  H04L25/03343 ,  H04L2001/0096 ,  H04W52/24 ,  H04W52/42

摘要： Techniques to process data for transmission over a set of transmission channels selected from among all available transmission channels. In an aspect, the data processing includes coding data based on a common coding and modulation scheme to provide modulation symbols and pre-weighting the modulation symbols for each selected channel based on the channel's characteristics. The pre-weighting may be achieved by “inverting” the selected channels so that the received SNRs are approximately similar for all selected channels. With selective channel inversion, only channels having SNRs at or above a particular threshold are selected, “bad” channels are not used, and the total available transmit power is distributed across only “good” channels. Improved performance is achieved due to the combined benefits of using only the NS best channels and matching the received SNR of each selected channel to the SNR required by the selected coding and modulation scheme.

摘要翻译： 用于处理数据以在从所有可用传输信道中选择的一组传输信道上进行传输的技术。 在一方面，数据处理包括基于公共编码和调制方案的编码数据，以提供调制符号并且基于该信道的特征对每个所选择的信道预先加权调制符号。 预加权可以通过“反转”所选择的信道来实现，使得接收的SNR对于所有选择的信道大致相似。 通过选择性信道反转，仅选择具有等于或高于特定阈值的SNR的信道，不使用“坏”信道，并且总可用发射功率仅在“良好”信道上分布。 由于仅使用NS最佳通道并将每个所选信道的接收SNR与所选择的编码和调制方案所需的SNR相匹配的优点，可以实现改进的性能。

公开(公告)号：US07991040B2

公开(公告)日：2011-08-02

申请号：US11519256

申请日：2006-09-11

申请人： Durk L. van Veen ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

发明人： Durk L. van Veen ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

IPC分类号： H04B1/00

CPC分类号： H04L27/2614 ,  H04L27/2615

摘要： Methods and apparatus for reduction of a peak to average ratio for an OFDM transmit signal. In an aspect, a method is provided for reducing a peak to average ratio of a transmit waveform. The method includes obtaining a primary scrambler sequence, generating a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining the primary and secondary scrambler sequences to produce a PAR reduction sequence. In another aspect, an apparatus is provided for reducing a peak to average ratio of a transmit waveform. The apparatus includes a secondary generator configured to generate a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining logic configured to combine a primary scrambler sequence and the secondary scrambler sequences to produce a PAR reduction sequence.

摘要翻译： 降低OFDM发射信号的峰均比的方法和装置。 在一方面，提供了一种降低发射波形的峰均比的方法。 该方法包括：获得主加扰器序列，产生具有基于要加扰的数据的长度特性的次扰频序列，以及组合所述主加扰序列和次加扰序列以产生PAR减少序列。 在另一方面，提供一种用于减小发射波形的峰均比的装置。 该装置包括辅助发生器，其被配置为产生具有基于要加扰的数据的长度特性的二次扰频器序列，以及被配置为组合主加扰器序列和次加扰器序列以产生PAR减少序列的组合逻辑。

公开(公告)号：US07949060B2

公开(公告)日：2011-05-24

申请号：US12554608

申请日：2009-09-04

申请人： Fuyun Ling ,  Jay R. Walton ,  Steven J. Howard ,  Mark Wallace ,  John W. Ketchum

发明人： Fuyun Ling ,  Jay R. Walton ,  Steven J. Howard ,  Mark Wallace ,  John W. Ketchum

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0854 ,  H04B7/0891 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0026 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/006 ,  H04L5/0091 ,  H04L25/0204 ,  H04L25/021 ,  H04L25/0228 ,  H04L25/0244 ,  H04L25/0248 ,  H04L25/03159 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Techniques for transmitting data from a transmitter unit to a receiver unit in a multiple-input multiple-output (MIMO) communication system. In one method, at the receiver unit, a number of signals are received via a number of receive antennas, with the received signal from each receive antenna comprising a combination of one or more signals transmitted from the transmitter unit. The received signals are processed to derive channel state information (CSI) indicative of characteristics of a number of transmission channels used for data transmission. The CSI is transmitted back to the transmitter unit. At the transmitter unit, the CSI from the receiver unit is received and data for transmission to the receiver unit is processed based on the received CSI.

摘要翻译： 用于在多输入多输出（MIMO）通信系统中将数据从发射机单元传输到接收机单元的技术。 在一种方法中，在接收机单元处，经由多个接收天线接收多个信号，其中来自每个接收天线的接收信号包括从发射机单元发送的一个或多个信号的组合。 处理所接收的信号以导出指示用于数据传输的多个传输信道的特性的信道状态信息（CSI）。 CSI被发回到发射机单元。 在发射机单元处，接收来自接收机单元的CSI，并根据所接收到的CSI处理用于传输到接收机单元的数据。