Title :
Decoding Behavior Study of LDPC Codes Under a Realistic Magnetic Recording Channel Model
Author :
Hu, Xinde ; Kumar, B Vijaya V K ; Sun, Lingyan ; Xie, Jin
Author_Institution :
Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA
Abstract :
Low-density parity check (LDPC) codes have shown near-capacity performance in additive white Gaussian noise (AWGN) channels. However, in magnetic recording systems, the readback signals suffer from various impairments (namely, transition noise, nonlinear transition shift, and partial erasure) in addition to AWGN. In this paper, we describe an FPGA-based advanced magnetic recording channel simulator (that includes these impairments) and an LDPC coding system. The error correcting performances of LDPC codes in the presence of such realistic impairments are investigated down to bit error rate (BER) of 10-11 and frame error rate (FER) of 10-8
Keywords :
AWGN channels; error statistics; field programmable gate arrays; magnetic recording; parity check codes; additive white Gaussian noise channels; advanced magnetic recording channel simulator; bit error rate; field programmable gate arrays; frame error rate; low-density parity check codes; readback signals; AWGN; Additive white noise; Bit error rate; Decoding; Error analysis; Error correction codes; Gaussian noise; Magnetic noise; Magnetic recording; Parity check codes; EPR4; FPGA; LDPC code; magnetic recording; nonlinear transition shift; partial erasure;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.878652
