Iterative decoding for partial response (PR), equalized, magneto-optical (MO) data storage channels

Author

Song, Hongwei ; Kumar, B. V K Vijaya ; Kurtas, Erozan ; Yuan, Yifei ; McPheters, Laura L. ; McLaughlin, Steven W.

Author_Institution

Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

19

Issue

4

fYear

2001

fDate

4/1/2001 12:00:00 AM

Firstpage

774

Lastpage

782

Abstract

Turbo codes and low-density parity check (LDPC) codes with iterative decoding have received significant research attention because of their remarkable near-capacity performance for additive white Gaussian noise (AWGN) channels. Previously, turbo code and LDPC code variants are being investigated as potential candidates for high-density magnetic recording channels suffering from low signal-to-noise ratios (SNR). We address the application of turbo codes and LDPC codes to magneto-optical (MO) recording channels. Our results focus on a variety of practical MO storage channel aspects, including storage density, partial response targets, the type of precoder used, and mark edge jitter. Instead of focusing just on bit error rates (BER), we also study the block error statistics. Our results for MO storage channels indicate that turbo codes of rate 16/17 can achieve coding gains of 3-5 dB over partial response maximum likelihood (PRML) methods for a 10^-4 target BER. Simulations also show that the performance of LDPC codes for MO channels is comparable to that of turbo codes, while requiring less computational complexity. Both LDPC codes and turbo codes with iterative decoding are seen to be robust to mark edge jitter

Keywords

AWGN channels; concatenated codes; equalisers; error statistics; iterative decoding; magneto-optical recording; noise; partial response channels; turbo codes; AWGN channels; BER; LDPC code; MO recording channels; MO storage channel; PRML methods; SNR; additive white Gaussian noise channels; bit error rates; block error statistics; code rate; coding gain; computational complexity; concatenated codes; equalized magneto-optical data storage channels; high-density magnetic recording channels; iterative decoding; low signal-to-noise ratio; low-density parity check codes; magneto-optical recording channels; mark edge jitter; partial response channels; partial response maximum likelihood methods; precoder; storage density; turbo codes; AWGN; Additive white noise; Bit error rate; Iterative decoding; Jitter; Magnetic recording; Magnetooptic recording; Parity check codes; Signal to noise ratio; Turbo codes;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.920185

Filename

920185