Paper Info
Title
TDMR Detection System with Local Area Influence Probabilistic a Priori Detector.
Abstract
We propose a three-track detection system for two dimensional magnetic recording (TDMR) in which a local area influence probabilistic (LAIP) detector works with a trellis-based Bahl-Cocke-Jelinek-Raviv (BCJR) detector to remove intersymbol interference (ISI) and intertrack interference (ITI) among coded data bits as well as media noise due to magnetic grain-bit interactions. Two minimum mean-squared error (MMSE) linear equalizers with different response targets are employed before the LAIP and BCJR detectors. The LAIP detector considers local grain-bit interactions and passes coded bit log-likelihood ratios (LLRs) to the channel decoder, whose output LLRs serve as a priori information to the BCJR detector, which is followed by a second channel decoding pass. Simulation results under 1-shot decoding on a grain-flipping-probability (GFP) media model show that the proposed LAIP/BCJR detection system achieves density gains of 6.8% for center-track detection and 1.2% for three-track detection compared to a standard BCJR/1D-PDNP. The proposed system's BCJR detector bit error rates (BERs) are lower than those of a recently proposed two-track BCJR/2D-PDNP system by factors of (0.55, 0.08) for tracks 1 and 2 respectively.
Year
DOI
Venue
2019
10.1109/icc.2019.8761903
IEEE International Conference on Communications
Keywords
Field
DocType
Two-dimensional magnetic recording,iterative detection and decoding,local area influence probability,grain-flipping-probability model
Intersymbol interference,Computer science,A priori and a posteriori,Data bits,Communication channel,Algorithm,Interference (wave propagation),Probabilistic logic,Decoding methods,Detector
Journal
Volume
ISSN
Citations 
abs/1904.06599
1550-3607
0
PageRank 
References 
Authors
0.34
0
6
Name
Order
Citations
PageRank
Jinlu Shen100.34
Xueliang Sun283.18
Krishnamoorthy Sivakumar369353.64
Benjamin J. Belzer4292.93
Kheong Sann Chan5295.14
Ashish James6185.43