Title :
Iterative Decoding Using Attenuated Extrinsic Information from Sum-Product Decoder for PMR Channel With Patterned Medium
Author :
Nakamura, Yoshihiko ; Nishimura, M. ; Okamoto, Yuji ; Osawa, Hideya ; Hajime Aoi ; Muraoka, Hiroaki ; Nakamura, Yoshihiko
Author_Institution :
Graduate Sch. of Sci. & Eng., Ehime Univ., Matsuyama
fDate :
6/1/2007 12:00:00 AM
Abstract :
An LDPC coding and iterative decoding system is studied in perpendicular magnetic recording (PMR) with a bit-patterned medium. We propose an iterative decoding scheme using attenuated extrinsic information from a sum-product decoder, and the bit error rate (BER) performance of the LDPC coding and iterative decoding system is evaluated by R/W computer simulations. It has been clarified that at an areal density of 1 Tbpsi the proposed system provides a jitter margin of the island edges of approximately 0.6% larger than the conventional system using (3, 18)-regular LDPC code
Keywords :
channel coding; error statistics; iterative decoding; parity check codes; perpendicular magnetic recording; LDPC coding; PMR channel; attenuated extrinsic information; bit error rate; bit-patterned medium; iterative decoding; jitter; perpendicular magnetic recording; sum-product decoder; AWGN; Additive white noise; Bit error rate; Colored noise; Gaussian noise; Iterative decoding; Jitter; Magnetic noise; Parity check codes; Perpendicular magnetic recording; Iterative decoding; LDPC codes; patterned medium; perpendicular magnetic recording (PMR);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.893421
