Design of Modulation Code for Storage System

Modulation code for optical recording systems have
been concentrated on the combined DC-free and
runlength-limited (RLL) code, in short DCRLL code.
However, the design of high rate DCRLL code
satisfying all of two constraints is far from
obvious. Certainly, if channel is not free of errors,
it is pointless to feed the sequences only satisfying
RLL constraints.The weakly constrained coding scheme
can accomplish the higher rate while it may
relatively cause error in channel. The problem can be
solved by designing the code with error correction
capability. In this dissertation, in order to
accomplish the above goals, low-density parity-check
coded multimode code (LDPCCMC) and selection criteria
are developed. The error control of LDPCCMC is
conducted by the low-density parity-check (LDPC)
code, and its high rate and DC-free properties are
obtained by the design of multimode code using LDPC
matrixes and the aid of selection criteria,
respectively. I think that this research will be
useful to anyone who may be interested in channel
coding for storage system.

Autorentext
He have received his B.S., M.S. and Ph.D. degree from Dongguk
University, Seoul, Korea in 1998, 2000 and 2003, respectively.
Since 2003, he joined the faculty of Samsung Advanced Institute
of Technology, and he is working with LG Electronics.
His research interests are signal processing and coding for
storage systems and communication theory.

Klappentext
Modulation code for optical recording systems have been concentrated on the combined DC-free and runlength-limited (RLL) code, in short DCRLL code. However, the design of high rate DCRLL code satisfying all of two constraints is far from obvious. Certainly, if channel is not free of errors, it is pointless to feed the sequences only satisfying RLL constraints.The weakly constrained coding scheme can accomplish the higher rate while it may relatively cause error in channel. The problem can be solved by designing the code with error correction capability. In this dissertation, in order to accomplish the above goals, low-density parity-check coded multimode code (LDPCCMC) and selection criteria are developed. The error control of LDPCCMC is conducted by the low-density parity-check (LDPC) code, and its high rate and DC-free properties are obtained by the design of multimode code using LDPC matrixes and the aid of selection criteria, respectively. I think that this research will be useful to anyone who may be interested in channel coding for storage system.