NDLI: Decoding for magnetic recording media with overlapping tracks

Content Provider	IEEE Xplore Digital Library
Author	Singla, N. O'Sullivan, J.A. Miller, C.T. Indeck, R.S.
Copyright Year	1965
Abstract	Increasing recording track density by allowing overlap of adjacent tracks can lead to a substantial increase in storage density for magnetic recording. However, track overlap may cause severe intertrack interference (ITI) and result in loss of performance. Sophisticated signal processing techniques must then be used to recover this loss. We study the use of joint equalization and decoding for magnetic recording with overlapping tracks. We present results for a scheme that uses minimum mean-squared-error (MMSE) equalization in conjunction with error-correction coding using low-density parity-check (LDPC) codes. The recording process is simulated using a micromagnetic model for longitudinal magnetic recording. We use a three-track system to study the track overlap. The outer two tracks are allowed to overlap on the middle track to simulate ITI. Bit-error rate simulations show that the MMSE-LDPC decoding scheme incurs negligible loss when each of the outer tracks overlaps 10% on the middle track. By varying the recording parameters, the tradeoff between storage density and performance is also studied. We show that by a judicious choice of LDPC codes, a recording with track overlap can have better performance than when there is no overlap. Hence, a higher storage density can be obtained without loss in performance.
Sponsorship	IEEE Magnetics Society
Starting Page	2968
Ending Page	2970
Page Count	3
File Size	207783
File Format	PDF
ISSN	00189464
Volume Number	41
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decoding Magnetic recording Parity check codes Intersymbol interference Performance loss Modeling Bit error rate Magnetic heads Micromagnetics Two dimensional displays two-dimensional (2-D) intersymbol interference (ISI) Intertrack interference (ITI) low-density parity-check (LDPC) codes minimum mean-squared error (MMSE) multitrack recording
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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