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Concatenating a Structured LDPC Code and a Constrained Code to Preserve Soft-Decoding, Structure, and Burst Correction

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2 Author(s)
Yang Han ; Dept. of Electr. & Comput. Eng., Arizona Univ., Tucson, AZ ; Ryan, W.E.

In this paper, we propose a simple method to concatenate a structured low-density parity-check (LDPC) code and a high rate constrained code such that three goals are achieved simultaneously: 1) soft information is available to the LDPC decoder; 2) the structure of the LDPC code is retained after concatenation to facilitate hardware implementation; and 3) the system has the ability to correct long erasure bursts. We consider both a runlength-limited code and a dc-free runlength-limited code. For the RLL case, we use a technique we call parity insertion. For the dc-free case, we apply polarity flipping to a subset of the LDPC code parity bits

Published in:

Magnetics, IEEE Transactions on  (Volume:42 ,  Issue: 10 )

Date of Publication:

Oct. 2006

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