公开(公告)号：US5204874A

公开(公告)日：1993-04-20

申请号：US839528

申请日：1992-02-19

申请人： David D. Falconer ,  Fuyun Ling

发明人： David D. Falconer ,  Fuyun Ling

IPC分类号： H04J13/00 ,  H03M13/23 ,  H03M13/27 ,  H03M13/41 ,  H04J11/00 ,  H04L23/02

CPC分类号： H03M13/23 ,  H03M13/271 ,  H03M13/41 ,  H04J13/004 ,  H04J13/12 ,  H04L23/02

摘要： A method and apparatus is provided for encoding and decoding. In encoding, bits (202) are encoded (204) into symbols (206) such that maximum likelihood decoding is facilitated. Groups of symbols (206) are translated by either interleaving by group each group within a block (208) and subsequently deriving an orthogonal code from each group (212) or deriving an orthogonal code from each group and subsequently interleaving by code each code within a block. In decoding, groups of samples (228, 229) are transformed by either generating metrics and index symbols (242) for each group of samples (232, 234, 236, 238, 240) and subsequently deinterleaving by group each group of metrics within a block (244) or deinterleaving by group each group of samples within a block and subsequently generating metrics and index symbols for each deinterleaved group of samples. Each metric represents the confidence that a group of samples is a particular orthogonal code. Subsequently, maximum likelihood decoding (266) generates an estimated bit (268) from the index symbols and metrics (260).

摘要翻译： 提供了一种用于编码和解码的方法和装置。 在编码中，比特（202）被编码（204）到符号（206）中，从而便于最大似然解码。 符号组（206）通过组块（208）中的每个组交织并随后从每个组（212）导出正交码或从每个组中导出正交码并随后通过代码中的每个代码在一个 块。 在解码中，通过针对每组样本（232,234,236,238,240）生成度量和索引符号（242）来变换样本组（228,229），并且随后通过组对每组样本中的每组度量进行解交织 块（244）或块中的每组样本对每组样本进行解交织，并随后为每个解交织的样本组生成度量和索引符号。 每个度量表示一组样本是特定正交码的置信度。 随后，最大似然解码（266）从索引符号和度量（260）生成估计位（268）。

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：US09042461B2

公开(公告)日：2015-05-26

申请号：US11373001

申请日：2006-03-09

申请人： Raghuraman Krishnamoorthi ,  Fuyun Ling ,  Rajiv Vijayan

发明人： Raghuraman Krishnamoorthi ,  Fuyun Ling ,  Rajiv Vijayan

IPC分类号： H04N7/18 ,  H04L27/26

CPC分类号： H04L27/2644

摘要： Systems and methods are provided for transmitting OFDM information via IFFT up-sampling components that transmit data at a higher sampling rate than conventional systems to simplify filter requirements and mitigate leakage between symbols. In one embodiment, an NL point IFFT is performed on a zero inserted set of frequency domain symbols. In another embodiment, the NL point IFFT is further optimized by exploiting the fact that (N−1) L of the frequency domain symbols are zero. This enables an embodiment that consists of a pre-processor that multiplies the input samples by complex phase factors, followed by L point IFFTs.

摘要翻译： 提供了系统和方法，用于通过IFFT上采样组件传输OFDM信息，该组件以比常规系统更高的采样速率传输数据，以简化滤波器要求并减轻符号之间的泄漏。 在一个实施例中，对零插入的频域符号组执行NL点IFFT。 在另一个实施例中，通过利用频域符号的（N-1）L为零的事实进一步优化NL点IFFT。 这使得能够由预处理器组成的实施例，该预处理器将输入样本乘以复相位因子，随后是L点IFFT。

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：US08826093B2

公开(公告)日：2014-09-02

申请号：US11335013

申请日：2006-01-18

申请人： Gordon Kent Walker ,  Chinnappa K. Ganapathy ,  Dhinakar Radhakrishnan ,  Fuyun Ling ,  Rajiv Vijayan

发明人： Gordon Kent Walker ,  Chinnappa K. Ganapathy ,  Dhinakar Radhakrishnan ,  Fuyun Ling ,  Rajiv Vijayan

IPC分类号： H04L1/18 ,  H04L1/00

CPC分类号： H04L1/0053 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/0083

摘要： Conserving power for coded transmissions comprises ceasing to process parity packets once associated data packets are deemed correct or corrected. Once data packets are deemed correct or corrected, the receiving unit can shut off during the transmission of parity packets.

摘要翻译： 编码传输的节省功率包括：一旦相关联的数据分组被认为是正确的或纠正的，停止处理奇偶分组。 一旦数据分组被认为是正确的或纠正的，接收单元可以在传输奇偶分组期间关闭。

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：US08509051B2

公开(公告)日：2013-08-13

申请号：US11933264

申请日：2007-10-31

申请人： Fuyun Ling ,  Murali Ramaswamy Chari ,  Ashok Mantravadi ,  Raghuraman Krishnamoorthi

发明人： Fuyun Ling ,  Murali Ramaswamy Chari ,  Ashok Mantravadi ,  Raghuraman Krishnamoorthi

IPC分类号： H04J11/00

CPC分类号： H04L5/003 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0039 ,  H04L5/0041 ,  H04L5/0053 ,  H04L5/0064 ,  H04L5/0094

摘要： Techniques for multiplexing and transmitting multiple data streams are described. Transmission of the multiple data streams occurs in “super-frames”. Each super-frame has a predetermined time duration and is further divided into multiple (e.g., four) frames. Each data block for each data stream is outer encoded to generate a corresponding code block. Each code block is partitioned into multiple subblocks, and each data packet in each code block is inner encoded and modulated to generate modulation symbols for the packet. The multiple subblocks for each code block are transmitted in the multiple frames of the same super-frame, one subblock per frame. Each data stream is allocated a number of transmission units in each super-frame and is assigned specific transmission units to achieve efficient packing. A wireless device can select and receive individual data streams.

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：US08442160B2

公开(公告)日：2013-05-14

申请号：US12939118

申请日：2010-11-03

申请人： Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling ,  Krishna Kiran Mukkavilli

发明人： Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling ,  Krishna Kiran Mukkavilli

IPC分类号： H04L27/06

CPC分类号： H04L25/0232 ,  H04L25/022

摘要： Time filtering channel estimates in a wireless communication system, such as an Orthogonal Frequency Division Multiplex (OFDM) system, can be used to improve the quality of channel estimates. The characteristics of an optimal channel estimate time filter can depend on the manner in which the channel estimate is determined as well as the time correlation of channel estimates. A receiver can implement an adaptive time filter for channel estimates in which the time filter response can vary based on channel estimate parameters. The channel estimate parameters can include the manner of determining channel estimates, a time correlation of channel estimates, and an estimated Doppler frequency. The time filter response can be varied continuously over a range of responses or can be varied discretely over a predetermined number of time filter responses.

摘要翻译： 在诸如正交频分复用（OFDM）系统的无线通信系统中的时间滤波信道估计可以用于提高信道估计的质量。 最优信道估计时间滤波器的特征可以取决于信道估计的方式以及信道估计的时间相关性。 接收机可以实现用于信道估计的自适应时间滤波器，其中时间滤波器响应可以基于信道估计参数而变化。 信道估计参数可以包括确定信道估计的方式，信道估计的时间相关性和估计的多普勒频率。 时间滤波器响应可以在响应范围内连续变化，或者可以在预定数量的时间滤波器响应上离散变化。