公开(公告)号：US20150325266A1

公开(公告)日：2015-11-12

申请号：US14278188

申请日：2014-05-15

Applicant: LSI Corporation

Inventor： Wu Chang ,  Parviz Rahgozar ,  Ming Jin ,  Haitao Xia

IPC: G11B20/10

CPC classification number: G11B20/10509 ,  G11B20/10009 ,  G11B20/10481

Abstract: Variations of the Nelder-Mead direct search method are employed to find read channel parameter settings in a discrete field having three or more dimensions. The three or more dimensions correspond to read channel parameters, at least some of which are highly correlated. The steps of the Nelder-Mead method are executed according to a methodology to arrive at substantially optimal parameter settings for a read channel, even where a discrete function defining parameter outcomes is noisy. In some embodiments, dimensional collapse, considered inefficient in a two-dimensional field, is allowed in order to reach an optimal solution in a greater-than-two-dimensional field.

Abstract translation: 采用Nelder-Mead直接搜索方法的变化来在具有三维或更多维度的离散场中找到读通道参数设置。 三个或更多维度对应于读通道参数，其中至少一些是高度相关的。 Nelder-Mead方法的步骤是根据方法执行的，以便为读通道达到基本上最佳的参数设置，即使定义参数结果的离散函数是嘈杂的。 在一些实施例中，为了在大于二维的场中达到最优解，允许在二维场中被认为是无效的尺寸塌陷。

公开(公告)号：US09171572B1

公开(公告)日：2015-10-27

申请号：US14278188

申请日：2014-05-15

Applicant: LSI Corporation

Inventor： Wu Chang ,  Parviz Rahgozar ,  Ming Jin ,  Haitao Xia

IPC: G11B5/09 ,  G11B20/10

CPC classification number: G11B20/10509 ,  G11B20/10009 ,  G11B20/10481

Abstract: Variations of the Nelder-Mead direct search method are employed to find read channel parameter settings in a discrete field having three or more dimensions. The three or more dimensions correspond to read channel parameters, at least some of which are highly correlated. The steps of the Nelder-Mead method are executed according to a methodology to arrive at substantially optimal parameter settings for a read channel, even where a discrete function defining parameter outcomes is noisy. In some embodiments, dimensional collapse, considered inefficient in a two-dimensional field, is allowed in order to reach an optimal solution in a greater-than-two-dimensional field.

Abstract translation: 采用Nelder-Mead直接搜索方法的变化来在具有三维或更多维度的离散场中找到读通道参数设置。 三个或更多维度对应于读通道参数，其中至少一些是高度相关的。 Nelder-Mead方法的步骤是根据方法执行的，以便为读通道达到基本上最佳的参数设置，即使定义参数结果的离散函数是嘈杂的。 在一些实施例中，为了在大于二维的场中达到最优解，允许在二维场中被认为是无效的尺寸塌陷。

公开(公告)号：US08773789B1

公开(公告)日：2014-07-08

申请号：US13767317

申请日：2013-02-14

Applicant: LSI Corporation

Inventor： Wu Chang ,  Parviz Rahgozar ,  Ming Jin ,  Haitao Xia

IPC: G11B27/36 ,  G11B20/10

CPC classification number: G11B20/10481

Abstract: In one embodiment, a read/write chip for a hard disc drive has at least one on-chip, in-channel, hardware-based optimization processor that is part of one or more channels (e.g., read, write, and/or servo) of the read/write chip. The optimization processor can iteratively evaluate the performance of a channel for different values of one or more different parameters that control channel processing by generating an appropriate metric value for each different parameter value. The optimization processor can then select an optimal parameter value for subsequent channel processing.

Abstract translation: 在一个实施例中，用于硬盘驱动器的读/写芯片具有至少一个片上，基于信道内的基于硬件的优化处理器，其是一个或多个通道（例如，读，写和/或伺服）的一部分 ）的读/写芯片。 优化处理器可以通过针对每个不同的参数值生成适当的度量值来迭代地评估一个或多个不同参数的不同值的信道的性能，所述不同参数控制信道处理。 然后，优化处理器可以为随后的信道处理选择最佳参数值。