Paper Info
Title
Mitigating the Effects of Track Mis-Registration in Bit-Patterned Media
Abstract
In bit-patterned media (BPM) aimed at magnetic recording densities of 1 Tbit/in(2) and higher, adjacent tracks may become very close leading to significant inter-track interference (ITI). Read-head offset or track mis-registration (TMR) can further degrade the performance of the channel. To investigate the effects of ITI and TMR on the performance of the channel, we have developed a two-dimensional (2D) pulse response simulator for BPM. Simulation results using these pulse responses suggest that equalizers and detectors optimized for zero TMR may not perform well in the presence of TMR. To mitigate the effects of TMR, we propose a modified trellis for the Viterbi algorithm (VA). The modified VA (MVA) takes into account the ITI while computing branch metrics. Simulation results show that the MVA can improve the bit error rate in the presence of TMR.
Year
DOI
Venue
2008
10.1109/ICC.2008.395
ICC
Keywords
Field
DocType
electromagnetic interference,equalisers,magnetic recording,maximum likelihood estimation,telecommunication channels,Viterbi algorithm,bit error rate,bit-patterned media,equalizers,intertrack interference,magnetic recording densities,read-head offset,track misregistration,two-dimensional pulse response simulator
Patterned media,Computer science,Electromagnetic interference,Communication channel,Real-time computing,Interference (wave propagation),Detector,Viterbi algorithm,Bit error rate,Branch Metrics
Conference
ISSN
Citations 
PageRank 
1550-3607
1
0.77
References 
Authors
0
3
Name
Order
Citations
PageRank
Sheida Nabavi1188.68
B. V. K. Vijaya Kumar2924126.77
James A. Bain3174.96