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Paper Abstract and Keywords
Presentation 2015-05-22 10:25
Evaluation of Symmetric Mutual Information of Simplified TDMR Channel Model
Tadashi Wadayama (Nitech) IT2015-12 EMM2015-12
Abstract (in Japanese) (See Japanese page) 
(in English) In the present paper, a simplified two-dimensional magnetic recording (TDMR) channel model is proposed in order to capture the qualitative features of writing and read-back processes of TDMR systems.
The proposed channel model incorporates the effects of both linear interference from adjacent bit-cells and signal-dependent noise due to irregular grain boundaries between adjacent bit-cells.
The simplicity of the proposed model enables us to derive the closed form of the conditional PDF representing the probabilistic nature of the channel. The conditional PDF is Gaussian distributed and is parameterized by a signal-dependent covariance matrix. Based on this conditional PDF, a Monte Carlo method for approximating the symmetric mutual information of this channel is developed. The symmetric mutual information is closely related to the areal density limit for TDMR systems. The numerical results suggest that we may need low-rate coding, e.g., 2/3 or 1/2, when the jitter-like noise becomes dominant.
Keyword (in Japanese) (See Japanese page) 
(in English) magnetic recording / 2D-channel / symmetric mutual information / / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 37, IT2015-12, pp. 63-68, May 2015.
Paper # IT2015-12 
Date of Issue 2015-05-14 (IT, EMM) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF IT2015-12 EMM2015-12

Conference Information
Committee EMM IT  
Conference Date 2015-05-21 - 2015-05-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto International Community House 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Information Security, Information Theory, Information Hiding, etc. 
Paper Information
Registration To IT 
Conference Code 2015-05-EMM-IT 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of Symmetric Mutual Information of Simplified TDMR Channel Model 
Sub Title (in English)  
Keyword(1) magnetic recording  
Keyword(2) 2D-channel  
Keyword(3) symmetric mutual information  
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1st Author's Name Tadashi Wadayama  
1st Author's Affiliation Nagoya Institute of Technology (Nitech)
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Speaker Author-1 
Date Time 2015-05-22 10:25:00 
Presentation Time 25 minutes 
Registration for IT 
Paper # IT2015-12, EMM2015-12 
Volume (vol) vol.115 
Number (no) no.37(IT), no.38(EMM) 
Page pp.63-68 
#Pages 6 
Date of Issue 2015-05-14 (IT, EMM) 

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