公开(公告)号：US20060007989A1

公开(公告)日：2006-01-12

申请号：US11217948

申请日：2005-09-01

申请人： Tao Chen ,  Fuyun Ling ,  Edward Tiedemann

发明人： Tao Chen ,  Fuyun Ling ,  Edward Tiedemann

IPC分类号： H04B1/69 ,  H04B17/00

CPC分类号： H04B17/327 ,  H04B17/309

摘要： In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.

公开(公告)号：US06975669B2

公开(公告)日：2005-12-13

申请号：US10050338

申请日：2002-01-15

申请人： Fuyun Ling ,  Nagabhushana T. Sindhushayana ,  Eduardo A. S. Esteves

发明人： Fuyun Ling ,  Nagabhushana T. Sindhushayana ,  Eduardo A. S. Esteves

IPC分类号： H03M13/25 ,  H03M13/29 ,  H04L1/20 ,  H04B1/707

CPC分类号： H03M13/6337 ,  H03M13/2957 ,  H03M13/658 ,  H04L1/20

摘要： An efficient telecommunications receiver system for accurately decoding a received composite signal having a data signal component and a pilot signal component includes a first circuit for receiving the composite signal and extracting a pilot signal and a data signal from received composite signal. A second circuit calculates a log-likelihood ratio as a function of a channel estimate based on the pilot signal. A third circuit scales the log-likelihood ratio by a predetermined log-likelihood ratio scaling factor and provides an accurate log-likelihood value in response thereto. A fourth circuit decodes the received composite signal based on the accurate log-likelihood value and the data signal. The third circuit includes a carrier signal-to-interference ratio circuit for computing a first signal-to-interference ratio and a second signal-to-interference ratio based partly on the pilot signal.

摘要翻译： 一种用于对具有数据信号分量和导频信号分量的接收复合信号进行精确解码的有效电信接收机系统包括用于接收复合信号并从接收的复合信号中提取导频信号和数据信号的第一电路。 第二电路基于导频信号计算作为信道估计的函数的对数似然比。 第三电路将对数似然比缩小预定的对数似然比缩放因子，并响应于此提供准确的对数似然值。 第四电路基于准确的对数似然值和数据信号对接收到的复合信号进行解码。 第三电路包括用于基于导频信号计算第一信号干扰比和第二信号干扰比的载波信号干扰比电路。

公开(公告)号：US06414988B1

公开(公告)日：2002-07-02

申请号：US09310232

申请日：1999-05-12

申请人： Fuyun Ling

发明人： Fuyun Ling

IPC分类号： H04B1707

CPC分类号： H04B1/7115 ,  H04B2201/70703 ,  H04L25/0214

摘要： Apparatus for a transmitter and a receiver which enhance the performance of a system coherent demodulation by utilizing non-pilot sub-channels to enhance the accuracy of estimates of amplitude and phase noise inherent in the transmission channel is described. This enhancement is accomplished by utilizing the corrected received data on a fundamental channel to enhance a pilot channel estimate, which is subsequently utilized by a dot product module in demodulating a supplementary data channel.

摘要翻译： 描述了用于通过利用非导频子信道来提高传输信道固有的幅度和相位噪声的估计精度来增强系统相干解调性能的发射机和接收机的装置。 该增强通过利用基本信道上的校正的接收数据来增强导频信道估计来实现，该导频信道估计随后由点积模块在解调辅助数据信道中使用。

公开(公告)号：US5822359A

公开(公告)日：1998-10-13

申请号：US323944

申请日：1994-10-17

申请人： Eugene J. Bruckert ,  Shawn B. Dempster ,  Fuyun Ling

发明人： Eugene J. Bruckert ,  Shawn B. Dempster ,  Fuyun Ling

IPC分类号： H04B7/26 ,  H04B1/707

CPC分类号： H04B7/2628

摘要： A method and apparatus is provided to facilitate coherent communication in a random access channel. In encoding, reference symbols are inserted into a stream of access channel message data symbols and appended to a synchronization message to form a reference coded access channel transmission. Subsequently, the access channel transmission is prepared for transmission over a communication channel by being spread with a spreading code. In decoding, a known synchronization sequence is correlated with a received communication signal to generate a correlation peak when a synchronization message is present. The received communication signal is despread with a spreading code to derive a stream of reference samples and data samples. A channel response is determined from the correlation peak and revised based on estimates derived from the stream of reference samples. Finally, an estimated data symbol is detected from the stream of data samples by utilizing the revised channel response.

摘要翻译： 提供了一种用于促进随机接入信道中的相干通信的方法和装置。 在编码中，将参考符号插入到访问信道消息数据符号流中，并附加到同步消息以形成参考编码接入信道传输。 随后，通过利用扩展码扩展来准备通过通信信道传输的接入信道传输。 在解码中，当存在同步消息时，已知的同步序列与所接收的通信信号相关，以产生相关峰值。 接收到的通信信号用扩展码解扩，以导出参考样本和数据样本流。 从相关峰确定信道响应并根据从参考样本流导出的估计进行修正。 最后，通过利用经修改的信道响应从数据样本流中检测估计的数据符号。

公开(公告)号：US5329547A

公开(公告)日：1994-07-12

申请号：US31258

申请日：1993-03-11

申请人： Fuyun Ling

发明人： Fuyun Ling

IPC分类号： H04K1/00 ,  H03M13/00 ,  H04B1/707 ,  H04B7/08 ,  H04L25/02

CPC分类号： H04B7/0845 ,  H03M13/00 ,  H04B1/707 ,  H04L25/0228

摘要： A method and apparatus is provided for encoding and decoding to facilitate coherent communication. In encoding, reference symbols are inserted into a stream of input data symbols to form a reference coded stream of input data symbols. Subsequently, the reference coded stream of input data symbols are prepared for transmission over a communication channel by spreading the reference coded stream of input data symbols with a spreading code prior to transmission over the communication channel. In decoding, a received communication signal is despread with a spreading code to derive a stream of reference samples and a stream of data samples. The channel response is estimated by utilizing the stream of reference samples. Finally, an estimated data symbol is detected from the stream of data samples by utilizing the estimated channel response.

摘要翻译： 提供了一种用于编码和解码以便于相干通信的方法和装置。 在编码中，将参考符号插入到输入数据符号流中以形成输入数据符号的参考编码流。 随后，准备输入数据符号的参考编码流，以在通过通信信道传输之前通过扩展输入数据符号的参考编码流进行传输。 在解码中，接收的通信信号用扩展码解扩，以导出参考样本流和数据样本流。 通过利用参考样本流来估计信道响应。 最后，通过利用估计的信道响应从数据样本流中检测估计的数据符号。

公开(公告)号：US5245611A

公开(公告)日：1993-09-14

申请号：US709004

申请日：1991-05-31

申请人： Fuyun Ling ,  Gerald P. Labedz

发明人： Fuyun Ling ,  Gerald P. Labedz

IPC分类号： H04J3/00 ,  H04L7/08 ,  H04L25/02 ,  H04L27/00 ,  H04L27/14 ,  H04L27/22 ,  H04L27/233

CPC分类号： H04L27/2332 ,  H04L2027/003 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0095 ,  H04L25/0212

摘要： The present invention relates to a method and apparatus for providing carrier frequency offset compensation in a time division multiple access (TDMA) communication system. In this effort a TDMA receiver is adapted to receive, via a transmission channel, a transmitted signal burst which includes a synchronization signal pattern, a message signal portion and at least one known portion, in a TDMA time slot. Initially, a phase error at that portion of the received signal which corresponds to the known portion of the transmitted signal is determined. Thereafter, various received signal parameters are adjusted in order to eliminate the phase error and thereby compensate for any carrier frequency offsets.

摘要翻译： 本发明涉及一种用于在时分多址（TDMA）通信系统中提供载频偏移补偿的方法和装置。 在这种努力中，TDMA接收机适于经由传输信道在TDMA时隙中接收包括同步信号模式，消息信号部分和至少一个已知部分的发射信号脉冲串。 首先，确定与发送信号的已知部分对应的接收信号部分的相位误差。 此后，调整各种接收的信号参数以消除相位误差，从而补偿任何载波频率偏移。

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。