Joint and Separate Detection-Decoding on BPMR Channels

The presence of written-in errors is recognized as a challenging issue that limits the performance of bit-patterned media recording (BPMR). In this paper, we consider the Davey-MacKay coding scheme for a BPMR channel model which consists of a write channel producing dependent insertion, deletion, an...

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Bibliographic Details
Published in:IEEE transactions on magnetics Vol. 49; no. 7; pp. 3779 - 3782
Main Authors: Wu, Tong, Armand, Marc A.
Format: Journal Article Conference Proceeding
Language:English
Published: New York, NY IEEE 01.07.2013
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Bit error rate
Bit-patterned media (BPM)
channel detection
Channel models
Cross-disciplinary physics: materials science; rheology
Davey-MacKay (DM) construction
Decoding
Detectors
Encoding
Exact sciences and technology
Iterative decoding
Magnetism
Materials science
Other topics in materials science
Physics
Signal to noise ratio
written-in errors
Davey-MacKay (DM) construction
Bit-patterned media (BPM)
written-in errors
Magnetic properties
channel detection
ISSN:0018-9464, 1941-0069
Online Access:Get full text
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Summary:The presence of written-in errors is recognized as a challenging issue that limits the performance of bit-patterned media recording (BPMR). In this paper, we consider the Davey-MacKay coding scheme for a BPMR channel model which consists of a write channel producing dependent insertion, deletion, and substitution errors and a single-track equalized read channel with a GPR target. Three detection-decoding algorithms are proposed to work with an outer LDPC decoder to recover data encoded by the DM coding scheme on the BPMR channel. These include the Bahl-Cocke-Jelinek-Raviv binary input inner decoder (BCJR-BIID) algorithm, the joint detection-decoding algorithm and the separate detection-decoding (SDD) algorithm. Computer simulations show that at low to moderate (resp. high) signal-to-noise ratios, SDD (resp. BCJR-BIID) provides good performance-complexity trade-offs.
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ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2013.2250262