Title :
A Note on “Signal-to-Noise Ratio Mismatch for Low-Density Parity-Check Coded Magnetic Recording Channels” by W. Tan and J. R. Cruz
Author :
Saeedi, Hamid ; Banihashemi, Amir H.
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont.
Abstract :
In this letter, we prove that the minimum signal-to-noise ratio (SNR) threshold of the iterative belief propagation algorithm for a low-density parity-check (LDPC) coded magnetic recording channel is obtained when the SNR mismatch factor is half the ratio of variance to mean for the Gaussian distribution at the channel output. This result was first observed by Tan and Cruz empirically
Keywords :
Gaussian distribution; iterative methods; magnetic recording noise; parity check codes; Gaussian distribution; LDPC; SNR mismatch factor; iterative belief propagation algorithm; low-density parity-check code; magnetic recording channels; signal-to-noise ratio mismatch; AWGN; Additive white noise; Belief propagation; Bit error rate; Broadband communication; Gaussian noise; Iterative algorithms; Magnetic recording; Parity check codes; Signal to noise ratio; Low-density parity-check (LDPC) codes; magnetic recording channels (MRC); signal-to-noise ratio (SNR) mismatch;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.880998
