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1. 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。

2. 发明授权

US08307268B2 Iterative decoder systems and methods 有权
标题翻译：迭代解码器系统和方法
公开(公告)号：US08307268B2
公开(公告)日：2012-11-06
申请号：US12329581
申请日：2008-12-06
申请人： Panu Chaichanavong , Nedeljko Varnica , Nitin Nangare , Gregory Burd , Zining Wu
发明人： Panu Chaichanavong , Nedeljko Varnica , Nitin Nangare , Gregory Burd , Zining Wu
IPC分类号： G06F11/00
CPC分类号： H03M13/41 , G11B20/1426 , G11B20/1803 , G11B2020/10759 , G11B2020/1457 , H03M13/09 , H03M13/1105 , H03M13/1111 , H03M13/1114 , H03M13/13 , H03M13/29 , H03M13/2948 , H03M13/3746 , H03M13/4146 , H03M13/6343 , H03M13/6502 , H03M13/6561
摘要： Systems and methods are provided for improved designs and performance for iterative decoder systems. In some embodiments, the iterative decoder may be decoupled from FIR samples through an FIR RAM, thus resulting in a less complex design and shorter processing times. In some embodiments, an intermediate memory may be used when passing information between the SOVA and LDPC of the iterative decoder. In some embodiments, the SOVA-required information may be continuously serialized from information received from the LDPC during each LDPC iteration. In some embodiments, the 1/(1+D2) precoder of the HR RLL encoder may be split into two serial, 1/(1+D) precoders. One 1/(1+D) precoder may be pulled outside of the HR RLL encoder and used in conjunction with the iterative decoder. This may allow for a 1/(1+D) precoder that may be used with the iterative decoder while maintaining the RLL constraints imposed upon the encoded information by the HR RLL encoder.
摘要翻译：提供了系统和方法，用于改进迭代解码器系统的设计和性能。在一些实施例中，迭代解码器可以通过FIR RAM从FIR样本去耦，从而导致较不复杂的设计和较短的处理时间。在一些实施例中，当在迭代解码器的SOVA和LDPC之间传递信息时，可以使用中间存储器。在一些实施例中，可以在每次LDPC迭代期间从从LDPC接收的信息中连续序列化所需的SOVA信息。在一些实施例中，HR RLL编码器的1 /（1 + D2）预编码器可以被分成两个串行1 /（1 + D）个预编码器。一个1 /（1 + D）预编码器可以被拉出HR RLL编码器外部并与迭代解码器结合使用。这可以允许可以与迭代解码器一起使用的1 /（1 + D）预编码器，同时保持由HR RLL编码器对编码信息施加的RLL约束。

3. 发明授权

US08312354B1 Method and apparatus for improved performance of iterative decoders on channels with memory 有权
标题翻译：用于改善具有存储器的通道上的迭代解码器性能的方法和装置
公开(公告)号：US08312354B1
公开(公告)日：2012-11-13
申请号：US12336280
申请日：2008-12-16
申请人： Nedeljko Varnica , Nitin Nangare , Gregory Burd , Zining Wu
发明人： Nedeljko Varnica , Nitin Nangare , Gregory Burd , Zining Wu
IPC分类号： H03M13/45
CPC分类号： H03M13/6331 , H03M13/1105 , H03M13/2957 , H03M13/3905 , H03M13/4138
摘要： Systems and methods for improving the performance of iterative decoders on various channels with memory are disclosed. These systems and methods may reduce the frequency or number of situations in which the iterative decoder cannot produce decoded data that matches the data that was originally sent in a communications or data storage system. The iterative decoder includes a SISO channel detector and an ECC decoder and decodes the coded information according to at least one iterative decoding algorithm in regular decoding mode and/or at least one iterative decoding algorithm in error-recovery mode.
摘要翻译：公开了用于改善具有存储器的各种通道上的迭代解码器的性能的系统和方法。这些系统和方法可以减少迭代解码器不能产生与最初在通信或数据存储系统中发送的数据匹配的解码数据的情况的频率或数量。迭代解码器包括SISO信道检测器和ECC解码器，并且按照常规解码模式中的至少一个迭代解码算法和/或错误恢复模式中的至少一个迭代解码算法解码编码信息。

4. 发明申请

US20090150746A1 ITERATIVE DECODER SYSTEMS AND METHODS 有权
标题翻译：迭代解码器系统和方法
公开(公告)号：US20090150746A1
公开(公告)日：2009-06-11
申请号：US12329581
申请日：2008-12-06
申请人： Panu Chaichanavong , Nedeljko Varnica , Nitin Nangare , Gregory Burd , Zining Wu
发明人： Panu Chaichanavong , Nedeljko Varnica , Nitin Nangare , Gregory Burd , Zining Wu
IPC分类号： H03M13/05 , G06F11/07
CPC分类号： H03M13/41 , G11B20/1426 , G11B20/1803 , G11B2020/10759 , G11B2020/1457 , H03M13/09 , H03M13/1105 , H03M13/1111 , H03M13/1114 , H03M13/13 , H03M13/29 , H03M13/2948 , H03M13/3746 , H03M13/4146 , H03M13/6343 , H03M13/6502 , H03M13/6561
摘要： Systems and methods are provided for improved designs and performance for iterative decoder systems. In some embodiments, the iterative decoder may be decoupled from FIR samples through an FIR RAM, thus resulting in a less complex design and shorter processing times. In some embodiments, an intermediate memory may be used when passing information between the SOVA and LDPC of the iterative decoder. In some embodiments, the SOVA-required information may be continuously serialized from information received from the LDPC during each LDPC iteration. In some embodiments, the 1/(1+D2) precoder of the HR RLL encoder may be split into two serial, 1/(1+D) precoders. One 1/(1+D) precoder may be pulled outside of the HR RLL encoder and used in conjunction with the iterative decoder. This may allow for a 1/(1+D) precoder that may be used with the iterative decoder while maintaining the RLL constraints imposed upon the encoded information by the HR RLL encoder.
摘要翻译：提供了系统和方法，用于改进迭代解码器系统的设计和性能。在一些实施例中，迭代解码器可以通过FIR RAM从FIR样本去耦，从而导致较不复杂的设计和较短的处理时间。在一些实施例中，当在迭代解码器的SOVA和LDPC之间传递信息时，可以使用中间存储器。在一些实施例中，可以在每次LDPC迭代期间从从LDPC接收的信息中连续序列化所需的SOVA信息。在一些实施例中，HR RLL编码器的1 /（1 + D2）预编码器可以被分成两个串行，1 /（1 + D）个预编码器。一个1 /（1 + D）预编码器可以被拉出HR RLL编码器外部并与迭代解码器结合使用。这可以允许可以与迭代解码器一起使用的1 /（1 + D）预编码器，同时保持由HR RLL编码器对编码信息施加的RLL约束。

5. 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.

6. 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。

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

US08799737B1 Soft-information modification in concatenated decoding systems 有权
标题翻译：级联解码系统中的软信息修改
公开(公告)号：US08799737B1
公开(公告)日：2014-08-05
申请号：US13370354
申请日：2012-02-10
申请人： Nedeljko Varnica , Gregory Burd
发明人： Nedeljko Varnica , Gregory Burd
IPC分类号： H03M13/00
CPC分类号： H03M13/658 , H03M13/1111 , H03M13/4138 , H03M13/6331
摘要： Systems, methods, and other embodiments associated with data decoding are described. According to one embodiment, a method includes receiving an output value from one of a first block and a second block that form a pair of concatenated decoding blocks. The method includes determining a value of a modification criteria and modifying the output value based, at least in part, on the value of the modification criteria to form a modified output value. The modified output value is input to one of the first and second decoding blocks.
摘要翻译：描述与数据解码相关联的系统，方法和其他实施例。根据一个实施例，一种方法包括从形成一对级联解码块的第一块和第二块中的一个接收输出值。该方法包括至少部分地基于修改标准的值来确定修改标准的值并修改输出值，以形成修改的输出值。修改的输出值被输入到第一和第二解码块之一。

9. 发明授权

US08683277B1 Defect detection using pattern matching on detected data 有权
标题翻译：检测数据使用模式匹配进行缺陷检测
公开(公告)号：US08683277B1
公开(公告)日：2014-03-25
申请号：US13180723
申请日：2011-07-12
申请人： Nedeljko Varnica , Gregory Burd
发明人： Nedeljko Varnica , Gregory Burd
IPC分类号： G11C29/00 , G01R31/28 , G06F11/00
CPC分类号： G11C29/38 , G11B20/1889
摘要： Systems and methods for detection of defects on a magnetic storage medium. The method comprises: (1) receiving incoming detected data generated by reading information recorded on a storage medium, (2) identifying the defects in the storage medium based on comparison between the incoming detected data and a data pattern wherein the data pattern is predetermined; and (3) storing location information indicative of locations of the defects on the storage medium.
摘要翻译：用于检测磁存储介质上的缺陷的系统和方法。该方法包括：（1）接收通过读取记录在存储介质上的信息产生的输入检测数据，（2）基于输入的检测数据与数据模式预先确定的数据模式之间的比较识别存储介质中的缺陷; 和（3）将指示缺陷位置的位置信息存储在存储介质上。

10. 发明授权

US08683274B1 Error correction coding for varying signal-to-noise ratio channels 有权
标题翻译：改变信噪比通道的纠错编码
公开(公告)号：US08683274B1
公开(公告)日：2014-03-25
申请号：US13179429
申请日：2011-07-08
申请人： Nedeljko Varnica , Gregory Burd , Zining Wu
发明人： Nedeljko Varnica , Gregory Burd , Zining Wu
IPC分类号： G06F11/00
CPC分类号： H03M13/1148 , H03M13/033 , H03M13/1102 , H03M13/353
摘要： An ERSEC system that applies a level of error correction that is inversely related to susceptibility to error as indicated by a signal-to-noise ratio (SNR) profile of a channel. The SNR profile is estimated, detected or retrieved from an external source. The ERSEC system is used with any channel for which the SNRs can vary spatially, temporally or both.
摘要翻译： ERSEC系统，其应用与通道的信噪比（SNR）轮廓所指示的与误差易感性成反比关系的纠错水平。从外部源估计，检测或检索SNR分布。 ERSEC系统与任何可以在空间上，时间上或两者上变化的信道一起使用。

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