Open AccessEffect of system gain on optical chaotic communications systems
Author(s) -
Huijie Liu,
Jufu Feng
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.1484
Subject(s) - chaotic , computer science , demodulation , gigabit , automatic gain control , encryption , optical communication , communications system , loop gain , subtraction , control theory (sociology) , electronic engineering , telecommunications , optics , control (management) , physics , bandwidth (computing) , mathematics , channel (broadcasting) , computer network , artificial intelligence , amplifier , quantum mechanics , voltage , arithmetic , engineering
The chaotic communications systems with optical feedback lasers in strong injection and open-loop configuration are studied in this paper. The quantity relationship between gain and injection factor is obtained by numerical calculation. The demodulators performances under the conditions of whether the gain is used to adjust the output of the receiver are compared. The result indicates that the recovered message is more close to the original message by using the adjusted subtraction demodulation method. It is proved that message rate has no effect on gain by testing sine signals with different rates. Furtherthe gain is shown to be independent of message type and encryption mechanism by testing digital signals at 0.2?Gbit/s rate.