Single-Track equalization method with TMR correction system based on cross correlation functions for a patterned media recording system

Main Article Content

Lin Min Min Myint
Chanon Warisarn
Wiparat Busyatras
Piya Kovintavewat

Abstract

Bit-patterned media recording (BPMR) is a promising technology for ultra-high density media, however, there are some challenges that need to be addressed including two-dimensional (2D) interference, and track mis-registration (TMR). The system can experience TMR due to misalignment of the head and the track center. Conventionally, TMR is tackled using a 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 occur when the head is reading data sequences that are beyond the servo mechanism. To address this problem, we proposed TMR detection and correction techniques based on our previous work involving a single-track equalization method for a BPMR system using 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 in the value of mean square error (MSE) between the equalized and feedback signals from the detectors after passing through a one-dimensional (1D) target for each sequence. Then, the estimated TMR levels are used in selecting the appropriate equalizer and the generalized partial response (GPR) target pair to tackle the TMR from the readback signal.  The simulation results show improvement in the data recovery of a BPMR system using the proposed method when the system is experiencing 2D interference and TMR impairment.

Article Details

How to Cite
Min Min Myint, L., Warisarn, C., Busyatras, W., & Kovintavewat, P. (2017). Single-Track equalization method with TMR correction system based on cross correlation functions for a patterned media recording system. Engineering and Applied Science Research, 44(1), 16–19. Retrieved from https://ph01.tci-thaijo.org/index.php/easr/article/view/51945
Section
ORIGINAL RESEARCH
Author Biographies

Lin Min Min Myint, School of Information Technology, Shinawatra University, Pathumthani 12160, Thailand

School of Information Technology, Shinawatra University, Pathumthani 12160, Thailand.

Chanon Warisarn, College of Data Storage Innovation, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand

College of Data Storage Innovation, King Mongkut’s Institute of Technology Ladkrabang 10520, Thailand.

Wiparat Busyatras, College of Data Storage Innovation, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand

College of Data Storage Innovation King Mongkut’s Institute of Technology Ladkrabang 10520, Thailand.

Piya Kovintavewat, Data Storage Technology Research Center, Nakhon Pathom Rajabhat University, Nakhonpathom 73000, Thailand

 

Data Storage Technology Research Center Nakhon Pathom Rajabhat University Nakhonpathom 73000, Thailand.

 

References

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