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Thermal Asperity Suppression Based on Least Squares Fitting in Perpendicular Magnetic Recording Systems
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kovintavewat, Piya Koonkarnkhai, S. |
| Copyright Year | 2008 |
| Abstract | Thermal asperity (TA) causes a major problem in data detection process. Without the TA detection and correction algorithm, the system performance (even with perfect synchronization) can be unacceptable, depending on how severe the TA effect is. This paper proposes a new method to suppress the TA effects in perpendicular magnetic recording channels. The TA detection is a threshold-based approach, while the TA correction is done by averaging the readback signal and applying a least squares fitting technique to estimate the TA signal. Then, the corrected readback signal is obtained by subtracting the TA-affected readback signal by the reconstructed TA signal. Results indicate that the proposed method performs better than the existing one in terms of bit-error rate, and is robust to changes in the peak TA amplitude. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://home.npru.ac.th/piya/Documents/PIYA-MMM2008.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Algorithm Base Excision Repair Baseline (configuration management) Bit error rate Curve fitting Differential Thermal Analysis Distortion Hard disk drive Heart failure Least squares Magnetic storage Perpendicular recording Thermal grease Tunneling protocol X.690 Zero suppression |
| Content Type | Text |
| Resource Type | Article |
