M-ary optical data storage: fixed versus variable length modulation

Author

Licona, Estuardo ; McLaughlin, Steven W.

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

7

fYear

2003

fDate

1-5 Dec. 2003

Firstpage

3921

Abstract

We consider theoretical and practical aspects of an M-ary optical recording channel. Specifically, we address the performance tradeoffs between conventional pulse amplitude modulation (PAM) and M-ary runlength limited (RLL) coding in an optical disc system with compact disc parameters. Using a linear-time invariant channel model with white and nonwhite noise components, we see that, for signal-to-noise ratios found in typical CD systems, coded PAM outperforms M-ary RLL codes for a range of storage densities. In addition, this work also shows that for systems that require moderate-to-small values of M, M-ary RLL codes can provide significant advantages.

Keywords

data recording; optical disc storage; pulse amplitude modulation; random noise; runlength codes; white noise; M-ary optical data storage; PAM; RLL coding; compact disc parameters; linear-time invariant channel; nonwhite noise; optical recording channel; pulse amplitude modulation; runlength limited coding; signal-to-noise ratio; variable length modulation; white noise; Additive noise; Maximum likelihood detection; Memory; Optical modulation; Optical noise; Optical pulses; Optical recording; Optical signal processing; Pulse width modulation; Space vector pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE

Print_ISBN

0-7803-7974-8

Type

conf

DOI

10.1109/GLOCOM.2003.1258965

Filename

1258965