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首页> 外文期刊>IEEE Transactions on Magnetics >Look-Ahead Maximum Likelihood Data Detector for Optical Disk Drives
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Look-Ahead Maximum Likelihood Data Detector for Optical Disk Drives

机译：光盘驱动器的前瞻性最大似然数据检测器

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摘要

A simple maximum likelihood detector is described for system-on-chip (SoC) implementation for optical disk drives. As compared to the Viterbi detector (VD) commonly used for storage devices, this detector offers a solution for the speed bottleneck of the VD and less hardware complexity. Using look-ahead samples eliminates the need for a path memory and also resolves the speed bottleneck so that only a “select” operation is required within a clock cycle by moving the other two operations “add” and “compare” out of a clock cycle loop. Another advantage of this detector is that the target sample values can be constructed at the current sample time. This means that sample error can be estimated with significantly less delay for adaptive control loops. This detector is based on two-dimensional boundary functions, which can be readily derived by a simple procedure for finding a set of error events in the respective signal transition and envelope groups. This detector is currently used in a Samsung DVD super-multi-SoC.
机译：描述了一种用于光盘驱动器的片上系统（SoC）实现的简单最大似然检测器。与通常用于存储设备的维特比检测器（VD）相比，该检测器为VD的速度瓶颈和较低的硬件复杂性提供了解决方案。使用前瞻性样本消除了对路径存储的需求，并且解决了速度瓶颈，因此，通过将其他两个操作“加”和“比较”移出一个时钟周期，可以在一个时钟周期内只需要“选择”操作。环。该检测器的另一个优点是可以在当前采样时间构建目标采样值。这意味着对于自适应控制环路，可以以明显更少的延迟来估计采样误差。该检测器基于二维边界函数，可以通过简单的过程轻松找到二维边界函数，以找到相应信号转换和包络组中的一组错误事件。该检测器当前用于Samsung DVD super-multi-SoC。

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