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公开(公告)号:US20050213241A1
公开(公告)日:2005-09-29
申请号:US10809230
申请日:2004-03-25
申请人: Roy Cideciyan , Ajay Dholakia , Evangelos Eleftheriou , Richard Galbraith , Weldon Hanson , Thomas Mittelholzer , Travis Oenning , Michael Ross , David Stanek
发明人: Roy Cideciyan , Ajay Dholakia , Evangelos Eleftheriou , Richard Galbraith , Weldon Hanson , Thomas Mittelholzer , Travis Oenning , Michael Ross , David Stanek
CPC分类号: G11B5/035
摘要: An apparatus for providing dynamic equalizer optimization is disclosed. The present invention solves the above-described problems by providing equalizer coefficient updates that converge towards the same solution as the direct method without having to first write a known pattern to the disk or requiring any prior knowledge of the data already written on the disk. The adaptive cosine function may be used to modify only a DFIR tap set, only the j and k parameters of a cosine equalizer or to modify both the tap set for a DFIR filter and the j and k parameters of the cosine equalizer. Another algorithm, such as the LMS algorithm, may be used to modify parameters not modified by the cosine algorithm.
摘要翻译: 公开了一种用于提供动态均衡器优化的装置。 本发明通过提供均衡器系数更新来解决上述问题,所述均衡器系数更新收敛于与直接方法相同的解决方案,而不必首先将已知模式写入盘或需要任何已经写入盘中的数据的任何知识。 自适应余弦函数可用于仅修改DFIR抽头集,仅修改余弦均衡器的j和k参数,或者修改DFIR滤波器的抽头集合和余弦均衡器的j和k参数。 可以使用诸如LMS算法的另一种算法来修改未被余弦算法修改的参数。