NDLI: LDPC codes satisfying the (0,k) constraint

Content Provider	IEEE Xplore Digital Library
Author	Babvey, S. McLaughlin, S.W.
Copyright Year	1965
Abstract	In this paper, we use a stochastic expectation-maximization method to illustrate how to come close to achieving the capacity of the noisy (0,k) constrained additive white Gaussian noise (AWGN) channels. We use the bit-flipping-based constrained coding system proposed by Vasic and Pedagani, to transmit (0,k) constrained low-density parity check (LDPC) codewords over an AWGN channel. In the original approach of Vasic and Pedagani, if the number of flipped bits is large, the message-passing decoder of the LDPC codes fails to correct all the errors, and the system is prone to an error floor. We propose a flip decoder that exploits the information from the message-passing decoder to correct the flipped bits. We illustrate that the message-passing decoder and the flip decoder together correct both the channel and flip errors and achieve rates close to the noisy (0,k) channel capacity.
Sponsorship	IEEE Magnetics Society
Starting Page	2953
Ending Page	2955
Page Count	3
File Size	158480
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	Parity check codes Interference constraints Additive white noise AWGN Iterative decoding Magnetic recording Gaussian noise Error correction codes Error correction Optical recording modulation coding Error correction coding iterative decoding magnetic recording
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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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
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