Characterization and equalization of dropouts in the magnetic tape recording channel

F. Sarigoz, V. B., Vijaya Kumar, J. Bain
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引用次数: 4

Abstract

We consider the issue of combating signal dropouts in magnetic tape recording. Dropouts are a major limiting factor in the performance of the channel as they cause long bursts of bit errors. To attack this problem, a model of the dropout event has been developed. Based on that model, a strategy has been identified in which an envelope detector followed by a feedforward equalizer is used. The equalization process is done in such a way as to address the three major effects caused by a dropout event: amplitude loss, pulse widening and peakshift. The crucial part of this scheme is the spacing profile estimator, which makes use of an envelope detector. With this scheme, the effects of the dropout are corrected at the expense of a delay in the channel. The model of the dropout and the correction scheme are all presented.
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磁带记录通道中丢失的特性和均衡
我们考虑了磁带记录中信号丢失的问题。丢包是信道性能的主要限制因素,因为它们会导致长时间的误码突发。为了解决这个问题,我们开发了一个辍学事件模型。基于该模型,确定了一种使用包络检测器和前馈均衡器的策略。均衡过程是这样做的,以解决三个主要影响所造成的辍学事件:幅度损失,脉冲加宽和峰移。该方案的关键部分是利用包络检测器的间隔轮廓估计器。使用这种方案,以通道延迟为代价来纠正丢包的影响。给出了误差模型和校正方案。
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