专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08044832B1 Interleaver for turbo equalization 有权
公开(公告)号：US08044832B1
公开(公告)日：2011-10-25
申请号：US13038141
申请日：2011-03-01
申请人： Yifei Zhang , Kiran Gunnam , Gregory Burd
发明人： Yifei Zhang , Kiran Gunnam , Gregory Burd
IPC分类号： H03M7/00
CPC分类号： H03M13/2782 , H03M13/1102 , H03M13/116 , H03M13/2707 , H03M13/2742 , H03M13/2957 , H03M13/6325
摘要： A plurality of “local” interleavers replaces a single global interleaver for processing encoded data. If the encoded data may be represented as a matrix of data blocks, or “circulants,” each local interleaver can be the size of one or a small number of circulants. Thus, for example, if the matrix has a certain number of rows and columns, the number of local interleavers may be equal to the number of columns. Each local interleaver is small so latency is low.

2. 发明授权

US07911364B1 Interleaver for turbo equalization 有权
标题翻译：交换机用于涡轮均衡
公开(公告)号：US07911364B1
公开(公告)日：2011-03-22
申请号：US12203691
申请日：2008-09-03
申请人： Yifei Zhang , Kiran Gunnam , Gregory Burd
发明人： Yifei Zhang , Kiran Gunnam , Gregory Burd
IPC分类号： H03M7/00
CPC分类号： H03M13/2782 , H03M13/1102 , H03M13/116 , H03M13/2707 , H03M13/2742 , H03M13/2957 , H03M13/6325
摘要： A plurality of “local” interleavers replaces a single global interleaver for processing encoded data. If the encoded data may be represented as a matrix of data blocks, or “circulants,” each local interleaver can be the size of one or a small number of circulants. Thus, for example, if the matrix has a certain number of rows and columns, the number of local interleavers may be equal to the number of columns. Each local interleaver is small so latency is low.
摘要翻译：多个“本地”交织器替换单个全局交织器来处理编码数据。如果编码数据可以表示为数据块或“循环”的矩阵，则每个局部交织器可以是一个或少数循环的大小。因此，例如，如果矩阵具有一定数量的行和列，则本地交织器的数量可以等于列数。每个局部交织器都很小，所以延迟很低。

3. 发明授权

US08745468B1 Iterative decoding systems using noise-biasing 有权
标题翻译：使用噪声偏置的迭代解码系统
公开(公告)号：US08745468B1
公开(公告)日：2014-06-03
申请号：US12357200
申请日：2009-01-21
申请人： Yifei Zhang , Nedeljko Varnica , Gregory Burd
发明人： Yifei Zhang , Nedeljko Varnica , Gregory Burd
IPC分类号： H03M13/00
CPC分类号： G06F11/1004 , H03M13/1102 , H03M13/1111 , H03M13/1117 , H03M13/2951 , H03M13/3723 , H03M13/6331 , H03M13/6508 , H03M13/658
摘要： Systems, methods, and apparatus are provided for improving the iterative decoding performance of a decoder, for example, as used in a wireless communications receiver or in a data retrieval unit. A decoding technique may receive and process a set of channel samples using an iterative decoder. If the iterative decoder output indicates a decoding failure, noise samples may be combined with the received channel samples to create biased channel samples. Noise samples may be generated using a pseudo-random noise generator and/or by using signals already present in the communications receiver or data retrieval unit. The biased channel samples may be provided to the iterative decoder and the iterative decoder may re-run using the biased channel samples.
摘要翻译：提供了系统，方法和装置，用于改进解码器的迭代解码性能，例如，如在无线通信接收机或数据检索单元中所使用的那样。解码技术可以使用迭代解码器来接收和处理一组信道样本。如果迭代解码器输出指示解码失败，则可以将噪声样本与接收到的信道样本组合以产生偏置信道样本。可以使用伪随机噪声发生器和/或通过使用已经存在于通信接收器或数据检索单元中的信号来产生噪声样本。可以将偏置的信道样本提供给迭代解码器，并且迭代解码器可以使用偏置信道样本重新运行。

4. 发明授权

US08769380B1 Methods and apparatus for error recovery in memory systems employing iterative codes 有权
标题翻译：使用迭代代码的存储器系统中的错误恢复方法和装置
公开(公告)号：US08769380B1
公开(公告)日：2014-07-01
申请号：US13285723
申请日：2011-10-31
申请人： Gregory Burd , Nedeljko Varnica , Yifei Zhang , Nitin Nangare
发明人： Gregory Burd , Nedeljko Varnica , Yifei Zhang , Nitin Nangare
IPC分类号： H03M13/00 , H03M13/11 , H03M13/45 , H04L1/00
CPC分类号： H03M13/1128 , H03M13/1105 , H03M13/1142 , H03M13/152 , H03M13/2906 , H03M13/3707 , H03M13/3715 , H03M13/3723 , H03M13/4138 , H03M13/458 , H03M13/6331 , H04L1/0042 , H04L1/0051 , H04L1/0057
摘要： Systems and methods for error recovery are presented. Data is decoded with an iterative decoding scheme having a first set of parameters. In response to a determination that the iterative decoding scheme has failed, the data is re-read. While the data is being re-read, the iterative decoding scheme is reconfigured with a second set of parameters, and the data is decoded with the reconfigured iterative decoding scheme. In response to determination that the reconfigured iterative decoding scheme has failed, an error type associated with the data is determined. An error recovery scheme is selected from a plurality of error recovery schemes for the data based on the determined error type.
摘要翻译：介绍了错误恢复的系统和方法。用具有第一组参数的迭代解码方案对数据进行解码。响应于迭代解码方案失败的确定，重新读取数据。在重新读取数据的同时，使用第二组参数来重新配置迭代解码方案，并用重新配置的迭代解码方案对数据进行解码。响应于确定重新配置的迭代解码方案已经失败，确定与数据相关联的错误类型。基于所确定的错误类型，从用于数据的多个错误恢复方案中选择错误恢复方案。

5. 发明授权

US09363036B1 Methods and apparatus for defect detection and correction via nonbinary iterative decoding 有权
标题翻译：通过非二次迭代解码进行缺陷检测和校正的方法和装置
公开(公告)号：US09363036B1
公开(公告)日：2016-06-07
申请号：US13292640
申请日：2011-11-09
申请人： Yifei Zhang , Gregory Burd
发明人： Yifei Zhang , Gregory Burd
IPC分类号： H03M13/00 , H04L1/00
CPC分类号： H04L1/0009 , H03M13/1111 , H03M13/2957 , H03M13/3723 , H03M13/373 , H03M13/3738 , H03M13/458 , H03M13/6331 , H04L1/005 , H04L1/0055
摘要： In nonbinary iterative decoding, a data recovery scheme corrects for corrupted or defective data by determining reliability metrics for blocks of decoded nonbinary data. Block or windowed detectors generate block reliability metrics for data blocks (rather than individual bits) of decoded data using soft information from the regular decoding mode or from new iterative decoding iterations performed during defect detection mode. A defect detection system triggers corrective decoding of selected data blocks based on the block reliability metrics, by for example, comparing the block reliability metrics to a threshold or by selecting an adjustable number of the least reliable data blocks.
摘要翻译：在非二进制迭代解码中，数据恢复方案通过确定解码的非二进制数据块的可靠性度量来校正损坏或缺陷数据。块或窗口检测器使用来自常规解码模式的软信息或在缺陷检测模式期间执行的新的迭代解码迭代来生成解码数据的数据块（而不是单独位）的块可靠性度量。缺陷检测系统通过例如将块可靠性度量与阈值进行比较或者通过选择可调节数量的最不可靠的数据块来触发基于块可靠性度量来校正所选数据块的解码。

6. 发明授权

US08799742B1 QC-LDPC decoder with list-syndrome decoding 有权
标题翻译：具有列表综合解码的QC-LDPC解码器
公开(公告)号：US08799742B1
公开(公告)日：2014-08-05
申请号：US13493760
申请日：2012-06-11
申请人： Yifei Zhang , Gregory Burd
发明人： Yifei Zhang , Gregory Burd
IPC分类号： H03M13/00 , H03M13/11 , H03M13/03
CPC分类号： H03M13/1142 , H03M13/036 , H03M13/1128 , H03M13/116 , H03M13/451 , H03M13/458
摘要： A QC-LDPC decoding system employing a trapping set look-up table is provided. The entries of the trapping set look-up table may be sorted according to failure frequencies of the trapping sets. The decoder may determine short-cycles associated with dominant trapping sets in order to decode the received codeword. If the iterative decoder of the QC-LDPC decoding system fails to produce a valid codeword, the decoder may compute the syndrome pattern of the processed codeword and search the look-up table for a trapping set class that is responsible for the iterative decoder's failure. If no responsible trapping set is found in the look-up table, the decoder may attempt to decode the received codeword using alternate decoding methods and subsequently determine a trapping set associated with the decoded codeword. If a trapping set is determined, then that trapping set may be added to the look-up table.
摘要翻译：提供了采用陷阱集查询表的QC-LDPC解码系统。陷阱集查询表的条目可以根据陷阱集合的故障频率进行排序。解码器可以确定与主要捕获集合相关联的短周期，以便解码所接收的码字。如果QC-LDPC解码系统的迭代解码器不能产生有效的码字，则解码器可以计算经处理的码字的校正码模式并搜索负责迭代解码器故障的陷阱集类的查找表。如果在查找表中没有发现负责的陷阱集，则解码器可以尝试使用替代解码方法来解码所接收的码字，并且随后确定与解码的码字相关联的陷阱集合。如果确定了捕获集合，则可以将该捕获集合添加到查找表中。

7. 发明授权

US08739009B1 Methods and apparatus for defect detection and correction via iterative decoding algorithms 有权
标题翻译：用于通过迭代解码算法进行缺陷检测和校正的方法和装置
公开(公告)号：US08739009B1
公开(公告)日：2014-05-27
申请号：US12328561
申请日：2008-12-04
申请人： Nedeljko Varnica , Yifei Zhang , Panu Chaichanavong , Gregory Burd
发明人： Nedeljko Varnica , Yifei Zhang , Panu Chaichanavong , Gregory Burd
IPC分类号： G06F11/00
CPC分类号： G06F11/0763 , G11B20/1833 , G11B2020/185 , H03M13/1111 , H03M13/2957 , H03M13/373 , H03M13/4138 , H03M13/6325 , H03M13/6343
摘要： In iterative decoding, a data recovery scheme corrects for corrupted or defective data by determining reliability metrics for blocks of decoded data. Block or windowed detectors generate block reliability metrics for data blocks (rather than individual bits) of decoded data using soft information from the regular decoding mode or from new iterative decoding iterations performed during error recovery mode. An error recovery system triggers corrective decoding of selected data blocks based on the block reliability metrics, by for example, comparing the block reliability metrics to a threshold or by selecting an adjustable number of the least reliable data blocks.
摘要翻译：在迭代解码中，数据恢复方案通过确定解码数据块的可靠性度量来校正损坏或缺陷数据。块或窗口检测器使用来自常规解码模式的软信息或在错误恢复模式期间执行的新的迭代解码迭代来生成解码数据的数据块（而不是单独位）的块可靠性度量。错误恢复系统通过例如将块可靠性度量与阈值进行比较或者通过选择可调节数量的最不可靠的数据块来触发基于块可靠性度量来对所选数据块的校正解码。

8. 发明授权

US08301984B1 QC-LDPC decoder with list-syndrome decoding 有权
公开(公告)号：US08301984B1
公开(公告)日：2012-10-30
申请号：US13397479
申请日：2012-02-15
申请人： Yifei Zhang , Hongwei Song , Gregory Burd
发明人： Yifei Zhang , Hongwei Song , Gregory Burd
IPC分类号： H03M13/00
CPC分类号： H03M13/1142 , H03M13/036 , H03M13/1128 , H03M13/116 , H03M13/451 , H03M13/458
摘要： A QC-LDPC decoding system employing a trapping set look-up table is provided. The QC-LDPC decoding system includes an iterative decoder that utilizes a message-passing algorithm to decode a received codeword. If the iterative decoder fails to produce a valid codeword, additional processing is performed to decode the received codeword. The additional processing includes the steps of computing the syndrome pattern of the received codeword, searching the look-up table for a trapping set class that is responsible for the iterative decoder's failure, retrieving from the look-up table a syndrome pattern and an error pattern of a member of the responsible trapping set class, and calculating the error pattern of the received codeword based on its syndrome pattern and the information retrieved from the look-up table. The received codeword is then corrected based on its error pattern.

9. 发明授权

US08347195B1 Systems and methods for near-codeword detection and correction on the fly 有权
公开(公告)号：US08347195B1
公开(公告)日：2013-01-01
申请号：US12689611
申请日：2010-01-19
申请人： Nedeljko Varnica , Yifei Zhang , Gregory Burd
发明人： Nedeljko Varnica , Yifei Zhang , Gregory Burd
IPC分类号： H03M13/00
CPC分类号： H03M13/1142 , H03M13/1117 , H03M13/1128 , H03M13/1137 , H03M13/114 , H03M13/1145 , H03M13/116 , H03M13/3707 , H03M13/6331 , H03M13/6577
摘要： Systems and methods are provided for enhancing the performance and throughput of a low-density parity check (LDPC) decoder. In some embodiments, the enhanced performance and throughput may be achieved by detecting and correcting near-codewords before the decoder iterates up to a predetermined number of iterations. In some embodiments, a corrector runs concurrently with the decoder to correct a near-codeword when the near-codeword is detected. In alternate embodiments, the corrector is active while the decoder is not active. Both embodiments allow for on-the-fly codeword error corrections that improve the performance (e.g., reducing the number of errors) without decreasing the throughput of the decoder.

10. 发明授权

US08127209B1 QC-LDPC decoder with list-syndrome decoding 有权
标题翻译：具有列表综合解码的QC-LDPC解码器
公开(公告)号：US08127209B1
公开(公告)日：2012-02-28
申请号：US12180229
申请日：2008-07-25
申请人： Yifei Zhang , Hongwei Song , Gregory Burd
发明人： Yifei Zhang , Hongwei Song , Gregory Burd
IPC分类号： H03M13/00
CPC分类号： H03M13/1142 , H03M13/036 , H03M13/1128 , H03M13/116 , H03M13/451 , H03M13/458
摘要： A QC-LDPC decoding system employing a trapping set look-up table is provided. The QC-LDPC decoding system includes an iterative decoder that utilizes a message-passing algorithm to decode a received codeword. If the iterative decoder fails to produce a valid codeword, additional processing is performed to decode the received codeword. The additional processing includes the steps of computing the syndrome pattern of the received codeword, searching the look-up table for a trapping set class that is responsible for the iterative decoder's failure, retrieving from the look-up table a syndrome pattern and an error pattern of a member of the responsible trapping set class, and calculating the error pattern of the received codeword based on its syndrome pattern and the information retrieved from the look-up table. The received codeword is then corrected based on its error pattern.
摘要翻译：提供了采用陷阱集查询表的QC-LDPC解码系统。 QC-LDPC解码系统包括利用消息传递算法对接收到的码字进行解码的迭代解码器。如果迭代解码器不能产生有效码字，则执行附加处理以对接收到的码字进行解码。附加处理包括以下步骤：计算接收到的码字的校正子模式，在查找表中搜索负责迭代解码器失败的陷阱集类，从查找表中检索出校正子模式和错误模式负责陷阱集类的成员，并且基于其综合征模式和从查找表检索的信息来计算接收到的码字的错误模式。接收的码字然后根据其错误模式被校正。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式