发明名称 |
Methods and devices for two-dimensional iterative multi-track based map detection |
摘要 |
Decoding data written over a plurality of tracks includes selecting a mask that accounts for Inter-Symbol-Interference, the mask including channel coefficients and defining a trellis defining a plurality of states; receiving a signal corresponding to an input pixel from each of the plurality of tracks and generating equalized samples therefrom; computing transition branch probabilities for each input vector based on a Gaussian noise distribution using the equalized samples, ideal samples and a priori probabilities of the input vector; computing forward and backward probabilities via recursions using the computed transition branch probabilities; combining the forward, backward and transition branch probabilities to generate a-posteriori probabilities for the input vector; marginalizing the a-posteriori probabilities over values of neighboring pixels to generate an a-posteriori probability for a pixel of the input vector in a given state, and decoding the pixel as a first or second logical state from the marginalized a-posteriori probabilities. |
申请公布号 |
US8582223(B1) |
申请公布日期 |
2013.11.12 |
申请号 |
US201213363155 |
申请日期 |
2012.01.31 |
申请人 |
GARANI SHAYAN S.;CHEN YIMING;WESTERN DIGITAL TECHNOLOGIES, INC. |
发明人 |
GARANI SHAYAN S.;CHEN YIMING |
分类号 |
G11B5/09;G11B20/14;H03D1/06 |
主分类号 |
G11B5/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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