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Single-Track equalization method with TMR correction system based on cross correlation functions for patterned media recording system |
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| รหัสดีโอไอ | |
| Creator | 1. Lin Min Min Myint 2. Chanon Warisarn 3. Wiparat Busyatras 4. Piya Kovintavewat |
| Title | Single-Track equalization method with TMR correction system based on cross correlation functions for patterned media recording system |
| Publisher | Faculty of Engineering, Khon Kaen University |
| Publication Year | 2560 |
| Journal Title | Engineering and Applied Science Research |
| Journal Vol. | 44 |
| Journal No. | 1 |
| Page no. | 16-19 |
| Keyword | Bit-patterned media recording, Track mis-registration, Equalization, Inter-track interference, Inter-system interference |
| ISSN | 2539-6161 |
| Abstract | Bit-patterned media recording (BPMR) is a promising technology for the ultra-high density but there are some challenges such as two-dimensional (2D) interference, track mis-registration (TMR) to be addressed. The system can experience with TMR because of the misalignment of the head position and the track center. Conventionally, TMR is tackled by the servo system in which the head position offset is estimated by processing the overhead servo sequences before reading the data sequences. However, TMR impairment can also be occurred when the head is reading the data sequences which is beyond the servo mechanism. In order to address this problem, we proposed a TMR detection and correction technique based on our previous work, the single-track equalization method for BPMR system using the cross-correlation functions between the single readback signal and each of the training sequences from three adjacent tracks. In this proposed technique, the presence and level of TMR is detected and estimated based on the changes of value of mean square error (MSE) between the equalized signal and the feedback signal from the detector after passing through the one-dimensional (1D) target for each sequence. Then, the estimated TMR levels are used in selecting the appropriate pair of the equalizer and the GPR target to tackle the effected TMR from the readback signal. The simulation results show the improvement in the data recovery of the BPMR system using the proposed method when the system is experiencing the 2D interference and TMR impairment. |
