Abstract
Low-density parity check (LDPC) coding and iterative decoding system is studied in a magnetic recording system using bit-patterned media (BPM) with recording error. In order to correctly write the recording sequence on the intended islands in the recording channel using BPM, the write synchronization to synchronize the write sequence with the position of island is required. We propose the LDPC coding and iterative decoding system which controls the reliability information by the results of error detection using the parity check matrix of LDPC code is to curb the influence of write-error due to loss of synchronization on the iterative decoding process. The performance is evaluated in the R/W channel using BPM at 2Tbit/inch^2 with write error by computer simulation. The results show that the proposed system provides the better performance compared with a conventional system without controlling the reliability information.
