PRML磁盘驱动器读通道的约束不对称LMS算法

Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154) Pub Date : 2000-10-29 DOI:10.1109/ACSSC.2000.910992

R. Staszewski, K. Muhammad, P. Balsara

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引用次数: 5

摘要

我们提出了一种约束最小均方(C-LMS)算法的实现，并应用于磁盘驱动器读通道。所提出的C-LMS算法的主要优点是提高了外部时序恢复环路的稳定性，而内部自适应环路对回读数据进行频谱整形。这消除了在C-LMS算法适应期间定时恢复环路的任何不稳定行为。该算法采用0.18 /spl μ m / L/sub / CMOS技术在商业读通道中实现和制造。最坏的情况下，它的工作频率是550兆赫。

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A constrained asymmetry LMS algorithm for PRML disk drive read channels

We present an implementation of a constrained least mean square (C-LMS) algorithm with application to magnetic disk drive read channels. The main advantage offered by the presented C-LMS algorithm is improved stability of the outer timing recovery loop while the spectral shaping of read-back data is performed in the inner adaptation loop. This eliminates any unstable behavior of the timing recovery loop during C-LMS algorithm adaptation. The proposed algorithm has been implemented and fabricated in a commercial read-channel using a 0.18 /spl mu/m L/sub eff/ CMOS technology. It operates at 550 MHz worst case.

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Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154)

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