公开(公告)号：US08705664B2

公开(公告)日：2014-04-22

申请号：US13205435

申请日：2011-08-08

申请人： Fan Mo ,  Sameep Dave

发明人： Fan Mo ,  Sameep Dave

IPC分类号： H04L27/22

CPC分类号： H04B10/6165 ,  H04B10/2569 ,  H04B10/613 ,  H04B10/6166 ,  H04B10/6971 ,  H04L25/03057

摘要： A soft-decision forward error correction scheme for received optical signals is described. Differential decoding may be performed, for example, in each polarization after coherent QPSK detection. Hard decisions may be made based on judging the most likely transition between each pair of received input symbols. Soft-input generation is also described, representing the reliability of the hard decisions. The soft-input information may be generated through simplified algorithms that utilize the most likely transitions to determine a reliability assignment.

摘要翻译： 描述了用于接收的光信号的软判决前向纠错方案。 可以例如在相干QPSK检测之后的每个极化中执行差分解码。 可以基于判断每对接收到的输入符号之间的最可能的转换来进行硬判定。 还介绍了软输入代码，代表了硬判决的可靠性。 软输入信息可以通过利用最可能的转换来确定可靠性分配的简化算法生成。

公开(公告)号：US08559828B2

公开(公告)日：2013-10-15

申请号：US13356198

申请日：2012-01-23

申请人： Fan Mo ,  Sameep Dave

发明人： Fan Mo ,  Sameep Dave

IPC分类号： H04B10/00 ,  H04B10/50

CPC分类号： H04B10/505 ,  H04B10/077 ,  H04B10/516 ,  H04B10/6166 ,  H04B10/6971 ,  H04L27/2096 ,  H04L27/22

摘要： Methods, systems, and devices are described for formatting of data streams to be transmitted over fiber optic channels, and for processing received optical signals. A data transmission device may include a digital coding and modulation module that encodes a digital data stream, inserts unique words into the digital data stream, and modulates the encoded data stream and unique words onto optical channels for transmission over an optical fiber. A demodulation and decoding device may include a unique word identification module that identifies the unique words inserted in each optical channel stream, determines one or more characteristics of the plurality of optical channels based on the unique words, and provides the one or more characteristics to one or more other modules in the demodulator and decoding device.

公开(公告)号：US08516333B1

公开(公告)日：2013-08-20

申请号：US12950318

申请日：2010-11-19

申请人： Sameep Dave ,  Fan Mo

发明人： Sameep Dave ,  Fan Mo

IPC分类号： H03M13/00

CPC分类号： H03M13/1137 ,  H03M13/1165 ,  H03M13/27 ,  H03M13/353

摘要： Systems, devices, and methods are disclosed herein using a pre-interleaving process to be performed at the transmitter. Data is rearranged at the transmitter, and the rearranged data is transmitted over the communication channel in an order that is more suitable for parallel processing at the decoder. Because processing at the transmitter is bit-wise rather than the multi-bit, soft-decision information at the decoder, pre-interleaving may reduce use system resources when compared to a re-interleaving process at the decoder.

摘要翻译： 本文公开了使用在发送器执行的预交错处理的系统，设备和方法。 在发射机处重新布置数据，并且重新排列的数据以更适合于解码器并行处理的顺序在通信信道上发送。 因为在发射机处的处理是比特而不是解码器处的多位软判决信息，所以与解码器上的重新交织过程相比，预交错可以减少使用系统资源。

公开(公告)号：US20120189324A1

公开(公告)日：2012-07-26

申请号：US13205435

申请日：2011-08-08

申请人： Fan Mo ,  Sameep Dave

发明人： Fan Mo ,  Sameep Dave

IPC分类号： H04B10/06 ,  H04L27/06

CPC分类号： H04B10/6165 ,  H04B10/2569 ,  H04B10/613 ,  H04B10/6166 ,  H04B10/6971 ,  H04L25/03057

摘要： A soft-decision forward error correction scheme for received optical signals is described. Differential decoding may be performed, for example, in each polarization after coherent QPSK detection. Hard decisions may be made based on judging the most likely transition between each pair of received input symbols. Soft-input generation is also described, representing the reliability of the hard decisions. The soft-input information may be generated through simplified algorithms that utilize the most likely transitions to determine a reliability assignment.

摘要翻译： 描述了用于接收的光信号的软判决前向纠错方案。 可以例如在相干QPSK检测之后的每个极化中执行差分解码。 可以基于判断每对接收到的输入符号之间的最可能的转换来进行硬判定。 还介绍了软输入代码，代表了硬判决的可靠性。 软输入信息可以通过利用最可能的转换来确定可靠性分配的简化算法生成。

公开(公告)号：US07760880B2

公开(公告)日：2010-07-20

申请号：US11249197

申请日：2005-10-13

申请人： Sameep Dave ,  Fan Mo

发明人： Sameep Dave ,  Fan Mo

IPC分类号： H04N7/167 ,  H03M13/00

CPC分类号： H03M13/1137

摘要： A decoder may perform node data reordering for bit node processing and node data reordering for bit node to check node interconnections. The decoder may also utilize a single barrel shifting operation on data read from an edge memory for bit node processing or check node processing during a memory read operation. The decoder may also utilize a single format conversion on data read from an edge memory for bit node processing or check node processing. The decoder may also utilize a simplified check node process for check node processing.

摘要翻译： 解码器可以执行用于位节点处理的节点数据重新排序和用于位节点的节点数据重新排序以校验节点互连。 在存储器读取操作期间，解码器还可以对从边缘存储器读取的数据进行比特节点处理或校验节点处理的单个桶移位操作。 解码器还可以对从边缘存储器读取的数据对位节点处理或校验节点处理采用单一格式转换。 解码器还可以利用用于校验节点处理的简化校验节点过程。

公开(公告)号：US08705977B1

公开(公告)日：2014-04-22

申请号：US13356192

申请日：2012-01-23

申请人： Fan Mo ,  Sameep Dave ,  Yuri Zelensky

发明人： Fan Mo ,  Sameep Dave ,  Yuri Zelensky

IPC分类号： H04B10/00 ,  H04B10/69 ,  H04B10/61

CPC分类号： H04B10/6165 ,  H04B10/2569 ,  H04B10/613 ,  H04B10/6166 ,  H04B10/6971 ,  H04L25/03057

摘要： Methods, systems, and devices are described for tap adjustment and reseeding in a digital filter. Filter and signal characteristics are measured and tap adjustments and reseeding of tap values may be performed based on the filter and signal characteristics. Filter characteristics that may be measured include a filter center of mass which may provide an indication that filter taps for a filter may be drifting toward a filter edge and thus reducing the dynamic range of the filter. Signal characteristics may include a timing offset between received input signals, and characteristics related to which of a particular input signal is present at a filter output. Filter taps, according to various embodiments, may be adjusted, and/or re-initialized responsive to one or more of the signal or filter characteristics.

摘要翻译： 描述了用于数字滤波器中的抽头调整和重新进给的方法，系统和装置。 测量滤波器和信号特性，并且可以基于滤波器和信号特性来执行抽头值的抽头调整和再充电。 可以测量的滤波器特性包括滤波器质心，其可以提供用于滤波器的滤波器抽头可能向滤波器边缘漂移并因此减小滤波器的动态范围的指示。 信号特性可以包括接收的输入信号之间的定时偏移，以及与滤波器输出处存在特定输入信号的特性有关的特性。 根据各种实施例，可以响应于信号或滤波器特性中的一个或多个来调整和/或重新初始化滤波器抽头。

公开(公告)号：US08566668B1

公开(公告)日：2013-10-22

申请号：US12984013

申请日：2011-01-04

申请人： Sameep Dave ,  Fan Mo

发明人： Sameep Dave ,  Fan Mo

IPC分类号： H03M13/00

CPC分类号： H03M13/1114 ,  H03M13/1137

摘要： Systems, devices, and methods are disclosed for a novel edge memory architecture. An architecture is described wherein the extrinsic information typically stored inside the edge memory is reformatted. Instead of storing the extrinsic information for every edge, the novel edge memory stores a set of possible extrinsic information values for a check node in a “value memory.” The edge memory also stores an index for each edge in a second, “index memory,” identifying which value stored in the value memory applies to each respective edge.

摘要翻译： 公开了一种新颖的边缘存储架构的系统，设备和方法。 描述了其中通常存储在边缘存储器内的外在信息被重新格式化的架构。 新边缘存储器不是存储每个边缘的外在信息，而是存储“值存储器”中的校验节点的一组可能的外在信息值。 边缘存储器还存储在第二“索引存储器”中的每个边缘的索引，其识别存储在值存储器中的值应用于每个相应边缘。

公开(公告)号：US20120189322A1

公开(公告)日：2012-07-26

申请号：US13356198

申请日：2012-01-23

申请人： Fan Mo ,  Sameep Dave

发明人： Fan Mo ,  Sameep Dave

IPC分类号： H04B10/04 ,  H04B10/12

CPC分类号： H04B10/505 ,  H04B10/077 ,  H04B10/516 ,  H04B10/6166 ,  H04B10/6971 ,  H04L27/2096 ,  H04L27/22

摘要： Methods, systems, and devices are described for formatting of data streams to be transmitted over fiber optic channels, and for processing received optical signals. A data transmission device may include a digital coding and modulation module that encodes a digital data stream, inserts unique words into the digital data stream, and modulates the encoded data stream and unique words onto optical channels for transmission over an optical fiber. A demodulation and decoding device may include a unique word identification module that identifies the unique words inserted in each optical channel stream, determines one or more characteristics of the plurality of optical channels based on the unique words, and provides the one or more characteristics to one or more other modules in the demodulator and decoding device.

摘要翻译： 描述了通过光纤通道传输的数据流的格式化以及处理所接收的光信号的方法，系统和设备。 数据传输设备可以包括对数字数据流进行编码的数字编码和调制模块，将唯一字插入到数字数据流中，并且将经编码的数据流和唯一字调制到光信道上以在光纤上传输。 解调和解码设备可以包括识别在每个光信道流中插入的唯一字的唯一字识别模块，基于唯一字确定多个光信道的一个或多个特性，并将一个或多个特性提供给一个 或更多其他模块在解调器和解码设备。

公开(公告)号：US20120189319A1

公开(公告)日：2012-07-26

申请号：US13205437

申请日：2011-08-08

申请人： Fan Mo ,  Sameep Dave ,  Lawrence W. Esker

发明人： Fan Mo ,  Sameep Dave ,  Lawrence W. Esker

IPC分类号： H04L27/01 ,  H04B10/00

CPC分类号： H04B10/6165 ,  H04B10/2569 ,  H04B10/613 ,  H04B10/6166 ,  H04B10/6971 ,  H04L25/03057

摘要： Polarization mode dispersion (PMD) in a dual-pole optical communications network is compensated for using an adaptive PMD equalizer. The PMD equalizer may include a number of substantially identical filter modules that provide partial outputs which may be combined to form a PMD compensated output. A constant modulus algorithm (CMA)-based equalizer may track PMD across both poles and generates an error signal. The CMA-based equalizer includes a filter bank, and uses an update algorithm and tap/output adjustments based on a difference between combined tap energies and an index, and feedback from a forward error correction code frame synchronizer.

摘要翻译： 使用自适应PMD均衡器来补偿双极光通信网络中的极化模式色散（PMD）。 PMD均衡器可以包括多个基本相同的滤波器模块，其提供可以组合以形成PMD补偿输出的部分输出。 基于恒模算法（CMA）的均衡器可以跟踪两极的PMD并产生误差信号。 基于CMA的均衡器包括滤波器组，并且使用基于组合抽头能量和索引之间的差的更新算法和抽头/输出调整以及来自前向纠错码帧同步器的反馈。

公开(公告)号：US20110047442A1

公开(公告)日：2011-02-24

申请号：US12858510

申请日：2010-08-18

申请人： Sameep Dave ,  Russell Fuerst ,  Mark Kohoot ,  Jim Keszenheimer ,  William H. Thesling

发明人： Sameep Dave ,  Russell Fuerst ,  Mark Kohoot ,  Jim Keszenheimer ,  William H. Thesling

IPC分类号： H03M13/05 ,  G06F11/10

CPC分类号： G06F11/1068

摘要： Methods, systems, and devices are described for forward error correction for flash memory. Encoded data from flash memory may be used to generate a number of data streams. At each of a number of error detection sub-modules operating in parallel, a different one of the data streams is processed. Each error detection sub-module may detect whether a portion of the respective received stream contains an error, and forward the portion to an error correction module. The error correction module, physically separate from the error detection sub-modules, may correct the forwarded portions of the respective received streams containing an error. The age and error rate associated with the flash memory may be monitored, and a coding rate or other aspects may be dynamically adapted to account for these factors.

摘要翻译： 描述了用于闪存的前向纠错的方法，系统和设备。 来自闪存的编码数据可用于生成多个数据流。 在并行操作的多个错误检测子模块中的每一个处理处理不同的数据流。 每个错误检测子模块可以检测相应接收流的一部分是否包含错误，并将该部分转发到纠错模块。 与错误检测子模块物理分离的纠错模块可以校正包含错误的相应接收流的转发部分。 可以监视与闪存相关联的年龄和错误率，并且编码率或其他方面可以动态地适应于考虑这些因素。