Optimal detection for perpendicular recording channels with transition noise
Optimal detection for perpendicular recording channels with transition noise
复制标题
具有过渡噪声的垂直记录通道的最佳检测
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
R. Negi
中科院分区：
文献类型：
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作者：
X. Zhang;R. Negi
针对高密度垂直磁记录通道，提出了一种基于真实过渡噪声模型的抖动敏感序列检测方案。在该方案中，假设转换抖动具有Q个离散值之一，并且使用最大后验准则联合估计离散化的抖动序列和记录的比特序列。将其检测性能与基于自回归高斯噪声模型的模式相关噪声预测方案进行了比较。仿真结果表明，该方案在过渡抖动较大且过渡噪声大于电子噪声的情况下具有显著的增益。
This paper proposes a jitter-sensitive-sequence-detection scheme based on a realistic transition noise model for high-density perpendicular magnetic recording channels. In this scheme, the transition jitter is assumed to have one of the Q discrete values, and the discretized jitter sequence is estimated jointly with the recorded bit sequence using maximum a posteriori criterion. The detection performance is compared with that of the pattern dependent noise predictive scheme based on an autoregressive Gaussian noise model. Simulation results show that the scheme provides a significant gain when the transition jitter is large and the resulting transition noise dominates over the electronic noise.