公开(公告)号：US20150015986A1

公开(公告)日：2015-01-15

申请号：US14323286

申请日：2014-07-03

Applicant: LSI Corporation

Inventor： Linjiang Guo ,  Zhi Bin Li ,  Yao Zhao ,  Dahua Qin

IPC: G11B5/596

CPC classification number: G11B5/59627 ,  G11B5/59688

Abstract: Improved threshold adaptation is provided for a predefined pattern in data. A detection threshold employed by a Euclidean detector to detect a pattern (such as a Servo Address Mark) in data is adapted by determining a minimum Euclidean distance metric Dp before the pattern is declared in a given portion of the data; determining a Euclidean distance metric Ds at a time when the pattern is found in the given portion, wherein at least one of the patterns is found using a Hamming detector; determining, for a plurality of the portions, a minimum Dp value, Dpmin, that is a substantial minimum Dp value for the plurality of portions and a maximum Ds value, Dsmax, that is a substantial maximum Ds value for the plurality of portions; and determining the detection threshold based on the minimum Dp value, Dpmin, and the maximum Ds value, Dsmax. The detection threshold is optionally based on a configurable margin gain value.

Abstract translation: 为数据中的预定义模式提供了改进的阈值适配。 通过在数据的给定部分中声明模式之前确定最小欧几里得距离度量Dp，来适应欧几里得检测器检测数据中的模式（例如伺服地址标记）的检测阈值; 确定在所述给定部分中发现所述图案时的欧几里得距离度量Ds，其中使用汉明检测器找到所述图案中的至少一个; 对于多个部分，确定作为多个部分的实质最小Dp值的最小Dp值Dpmin，以及作为多个部分的实质最大Ds值的最大Ds值Dsmax; 并且基于最小Dp值Dpmin和最大Ds值Dsmax来确定检测阈值。 检测阈值可选地基于可配置的裕量增益值。