公开(公告)号：US5966262A

公开(公告)日：1999-10-12

申请号：US829642

申请日：1997-03-31

申请人： Barret J. Brickner ,  Jaekyun Moon ,  Bernardo Rub

发明人： Barret J. Brickner ,  Jaekyun Moon ,  Bernardo Rub

IPC分类号： G11B5/012 ,  G11B20/10 ,  G11B5/035

CPC分类号： G11B20/10009 ,  G11B5/012

摘要： An information handling system, such as a magnetic disk drive, includes a data channel which has a method and apparatus for detecting binary symbols from a received signal occurring at high data rates. The data channel includes a detector that has two inputs. The detector has a first portion which determines a first estimate of a binary input. The second portion, operating in parallel with the first portion, determines two conditional estimates for a second binary input. The estimate for the second binary input is selected after the first estimate is determined. The first and second estimates for the first and second binary inputs are then output from the detector. Each of the first and second portions of the detector uses a three dimensional observation space with orthogonal coordinate axes. Each of three consecutive synchronous observation samples of the received signal corresponding unambiguously to an axis in the observation space. A decision feedback equalizer removes intersymbol interference terms associated with prior detector outputs. Each detector portion uses a plurality of linear classifiers to partition the observation space. The second and/or third sample of the equivalent channel response is constrained relative to the first for the purpose of simplifying the linear classifiers. Boolean logic functions to decide into which decision region of the observation space a sample maps into. Advantageously, the detector runs at a frequency that is half the frequency of the remaining portions of the read channel.

摘要翻译： 诸如磁盘驱动器之类的信息处理系统包括数据通道，该数据通道具有从高数据速率发生的接收信号中检测二进制符号的方法和装置。 数据通道包括一个具有两个输入的检测器。 检测器具有确定二进制输入的第一估计的第一部分。 与第一部分并行操作的第二部分确定用于第二二进制输入的两个条件估计。 在确定第一估计之后选择第二二进制输入的估计。 然后从检测器输出第一和第二二进制输入的第一和第二估计。 检测器的第一和第二部分中的每一个使用具有正交坐标轴的三维观察空间。 接收信号的三个连续同步观测样本中的每一个明确地对应于观测空间中的轴。 决策反馈均衡器去除与现有检测器输出相关联的符号间干扰项。 每个检测器部分使用多个线性分类器来分割观察空间。 为了简化线性分类器，等效信道响应的第二和/或第三样本相对于第一样本被约束。 布尔逻辑函数用于决定样本映射到的观测空间的决定区域。 有利地，检测器以读取通道的剩余部分的频率的一半的频率运行。