Title :
Iterative decoding and equalization for 2-D recording channels
Author :
Singla, Naveen ; O´Sullivan, Joseph A. ; Indeck, Ronald S. ; Wu, Yunxiang
Author_Institution :
Dept. of Electr. Eng., Washington Univ., St. Louis, MO, USA
fDate :
9/1/2002 12:00:00 AM
Abstract :
We study iterative decoding and equalization for information storage systems that have two-dimensional (2-D) intersymbol interference (ISI) during read-back. Two iterative schemes for 2-D equalization are introduced and evaluated. The first is based on minimum mean squared error (MMSE) estimation and the second is based on message passing on the combined graph of the ISI and the error correction code. Low-density parity-check codes are used for error correction. For the form of the ISI considered in our simulations the best performance is achieved by using the iterative decoding and MMSE equalization method.
Keywords :
AWGN channels; digital magnetic recording; equalisers; error correction codes; intersymbol interference; iterative decoding; least mean squares methods; message passing; 2D recording channels; ISI; LDPC codes; MMSE; equalization; error correction code; information storage systems; intersymbol interference; iterative decoding; low-density parity-check codes; magnetic recording channels; message passing; minimum mean squared error estimation; read-back; Atomic force microscopy; Bipartite graph; Error correction codes; Intersymbol interference; Iterative decoding; Magnetic force microscopy; Magnetic recording; Message passing; Parity check codes; Two dimensional displays;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801894
