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公开(公告)号：US07724844B2
公开(公告)日：2010-05-25
申请号：US11700340
申请日：2007-01-31
申请人： Mehmet F. Erden , Richard L. Keizer
发明人： Mehmet F. Erden , Richard L. Keizer
IPC分类号： H04L27/06
CPC分类号： G11B5/59688
摘要： A servo system for detecting and demodulating servo data is disclosed. In illustrated aspects, a demodulation circuit or portion includes a correlator component configured to output a correlation of a sequence of equalized channel samples with a sequence of correlator weight derived based on at least one mapped channel sequence. A decision component, for example a threshold detector uses the correlation results to output a data bit symbol based upon the correlation of the sequence of equalized channel samples to the at least one mapped channel sequence.
摘要翻译： 公开了一种用于检测和解调伺服数据的伺服系统。 在所示方面中，解调电路或部分包括相关器组件，其被配置为输出均衡信道样本序列与基于至少一个映射信道序列导出的相关器权重序列的相关性。 决策分量，例如阈值检测器使用相关结果，以基于均衡信道样本序列与至少一个映射信道序列的相关性来输出数据比特符号。
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公开(公告)号：US20080180825A1
公开(公告)日：2008-07-31
申请号：US11700340
申请日：2007-01-31
申请人： Mehmet F. Erden , Richard L. Keizer
发明人： Mehmet F. Erden , Richard L. Keizer
CPC分类号： G11B5/59688
摘要： A servo system for detecting and demodulating servo data is disclosed. In illustrated aspects, a demodulation circuit or portion includes a correlator component configured to output a correlation of a sequence of equalized channel samples with a sequence of correlator weight derived based on at least one mapped channel sequence. A decision component, for example a threshold detector uses the correlation results to output a data bit symbol based upon the correlation of the sequence of equalized channel samples to the at least one mapped channel sequence.
摘要翻译： 公开了一种用于检测和解调伺服数据的伺服系统。 在所示方面中，解调电路或部分包括相关器组件，其被配置为输出均衡信道样本序列与基于至少一个映射信道序列导出的相关器权重序列的相关性。 决策分量，例如阈值检测器使用相关结果，以基于均衡信道样本序列与至少一个映射信道序列的相关性来输出数据比特符号。
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公开(公告)号：US07064914B1
公开(公告)日：2006-06-20
申请号：US11020969
申请日：2004-12-22
CPC分类号： G11B5/596
摘要： In a method for generating a confidence level of a position error signal (PES) component that is indicative of a quality of the PES component, a PES component is generated using position signal samples of a read back signal corresponding to a servo burst pattern. Next, a noise level corresponding to noise in the read back signal is extracted using the position signal samples. A confidence level is then generated based on the PES component and the noise level. A system for performing the method includes a transformation block, a position error signal (PES) component extractor, a noise extractor, and a confidence level generator. The transformation block is configured to receive position signal samples of a read back signal corresponding to a servo burst pattern taken at a sampling frequency. A transformed domain representation of the position signal samples is then generated by the transformation block based on the sampling frequency and the servo burst pattern. The PES component extractor is configured to extract a PES component of a PES based on the position signal samples. The noise extractor is configured to extract a noise level from the transformed domain representation. The confidence level generator is configured to generate a confidence level that is indicative of a quality of the PES component based on the PES component and the noise level.
摘要翻译： 在用于产生表示PES分量的质量的位置误差信号（PES）分量的置信水平的方法中，使用与伺服脉冲串图形对应的回读信号的位置信号样本来产生PES分量。 接下来，使用位置信号采样来提取与回读信号中的噪声相对应的噪声电平。 然后基于PES分量和噪声电平产生置信水平。 用于执行该方法的系统包括变换块，位置误差信号（PES）分量提取器，噪声提取器和置信度发生器。 变换块被配置为接收对应于以采样频率拍摄的伺服脉冲串模式的读回信号的位置信号采样。 然后，基于采样频率和伺服脉冲串模式，通过变换块生成位置信号样本的变换域表示。 PES分量提取器被配置为基于位置信号样本提取PES的PES分量。 噪声提取器被配置为从变换的域表示中提取噪声电平。 置信水平发生器被配置为基于PES分量和噪声水平生成指示PES分量的质量的置信水平。
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