多阶光存储的调制原理分析与编码设计研究

根据编码理论的状态切分算法，提出一种新型的8阶(1,3)游程长度受限码，在最小记录符上能够存储3.0比特的用户数据，并且编码与译码逻辑简明，可用于未来高密度多阶游程长度调制光盘系统.

Modulation principles and code design for multilevel optical data storage

Multilevel optical data storage is an important technology to improve the recording density of optical disc without changing the optical parameters. One approach is multilevel amplitude modulation, which uses the variance of signal amplitude of length-fixed recorded marks to record information. Another one is multilevel runlength-limited (RLL) modulation, which records information in both the signal amplitude and the length of recorded marks, thus can improve the recording density more effectively than the first way. Multilevel RLL coding is a key technology in multilevel RLL modulation optical recording. In this paper, a new 8-ary (1,3) RLL code is designed with state splitting algorithm. The recording density of this code is as high as 3.0 bits/symbol, and the encoder/decoder is simple and easy to implement. The proposed code can be used for future high density multilevel RLL modulation optical disc systems.