Title :
Signal constellation design for optical intensity modulated channels
Author :
Hranilovic, Steve ; Kschischang, Frank R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
Abstract :
We define lattice codes for the optical intensity direct-detection channel. These codes obey a non-negativity constraint and are shaped to minimize average optical power. Expressions for the coding and shaping gain of such codes over a rectangular PAM baseline are presented. Over short distances, we show that lattice codes provide significant rate gains for free-space optical links
Keywords :
codes; intensity modulation; optical communication; optical links; optical modulation; telecommunication channels; average optical power minimization; coding gain; direct-detection channel; free-space optical links; lattice codes; nonnegativity constraint; optical intensity modulated channels; rectangular PAM baseline; shaping gain; signal constellation design; Amplitude modulation; Bandwidth; Constellation diagram; Intensity modulation; Lattices; Optical design; Optical fiber communication; Optical modulation; Optical noise; Signal design;
Conference_Titel :
Information Theory, 2001. Proceedings. 2001 IEEE International Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-7123-2
DOI :
10.1109/ISIT.2001.936138
