SNR mismatch effects in LDPC coded magnetic recording channels

Author

Tan, Weijun ; Cruz, J.R.

Author_Institution

Sch. of Electr. & Comput. Eng., Oklahoma Univ., Norman, OK, USA

Volume

7

fYear

2003

fDate

1-5 Dec. 2003

Firstpage

3899

Abstract

Signal-to-noise ratio (SNR) mismatch has been found to have a great impact on the performance of low-density parity-check (LDPC) coded magnetic recording channels. While an inappropriate SNR mismatch degrades the performance dramatically, a properly selected optimum SNR mismatch can improve it significantly. We analyze the causes of this phenomenon and find optimum values for the SNR mismatch for specific magnetic recording systems using both density evolution analysis and Monte Carlo simulations.

Keywords

AWGN channels; decoding; digital magnetic recording; error statistics; evolutionary computation; magnetic recording noise; parameter estimation; parity check codes; AWGN channel; BCJR decoder; BER estimation; Bahl-Cocke-Jelinek-Raviv decoder; LDPC coded magnetic recording channels; SNR mismatch effects; density evolution analysis; low-density parity-check codes; signal-to-noise ratio mismatch; AWGN; Additive white noise; Decoding; Gaussian noise; Magnetic analysis; Magnetic recording; Noise level; Parity check codes; Signal to noise ratio; System performance;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE

Print_ISBN

0-7803-7974-8

Type

conf

DOI

10.1109/GLOCOM.2003.1258961

Filename

1258961