Title :
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
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;
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
DOI :
10.1109/GLOCOM.2003.1258961
