We developed a high-speed simulator for partial response (PR) channels employing low density parity check (LDPC) codes. Bit error rate (BER) performances for channels employing PR(1,1) and PR(1,2,2,1) targets wtih blue laser and 0.85 numerical aperture (NA) are estimated by simulating up to 10¹¹ data sampled which allowed us to estimate BERs as low as 10^-10. Three data detection methods (namely, a simple slicer, soft-output Viterbi algorithm or SOVA, and maximum a posteriori probability or MAP detector) followed by LDPC decoder are compared. We also show BER performance of our one-chip hardware LDPC decoder on additive white Gaussian noise channel.

Date Published: 16 September 2003
PDF: 8 pages
Proc. SPIE 5069, Optical Data Storage 2003, (16 September 2003); doi: 10.1117/12.533046

Published in SPIE Proceedings Vol. 5069:
Optical Data Storage 2003
Michael O'Neill; Naoyasu Miyagawa, Editor(s)