The methodology for processing grossly undersampled HDD position error signal (PES) is proposed to improve the head-disk contact detection process. The proposed method is a combination of compressive sampling (CS) and adaptive discrete wavelet transform (ADWT) techniques. Here, CS is employed to reconstruct the PES information from very few revolutions of data while ADWT is utilized for extracting head-disk interface (HDI) modulation changes during thermal protrusion of the read/write element.
- Information Storage and Processing Systems Division
Low SNR Signal Processing for Head Media Contact Detection in HDD
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Daugela, A, & Tadepalli, S. "Low SNR Signal Processing for Head Media Contact Detection in HDD." Proceedings of the ASME 2014 Conference on Information Storage and Processing Systems. 2014 Conference on Information Storage and Processing Systems. Santa Clara, California, USA. June 23–24, 2014. V001T01A012. ASME. https://doi.org/10.1115/ISPS2014-6948
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