HOW SMALL CAN INTERMEDIATE-FREQUENCY BE IN COHERENT ASK LIGHTWAVE SYSTEMS

Authors
TANRIKULU MO
Citation
Mo. Tanrikulu, HOW SMALL CAN INTERMEDIATE-FREQUENCY BE IN COHERENT ASK LIGHTWAVE SYSTEMS, IEICE transactions on communications, E78B(8), 1995, pp. 1238-1244
Citations number
9
Categorie Soggetti
Engineering, Eletrical & Electronic",Telecommunications
Journal title
IEICE transactions on communications → ACNP
ISSN journal
09168516
Volume
E78B
Issue
8
Year of publication
1995
Pages
1238 - 1244
Database
ISI
SICI code
0916-8516(1995)E78B:8<1238:HSCIBI>2.0.ZU;2-C
Abstract
The impact of finite intermediate frequency (IF) on the sensitivity of heterodyne ASK lightwave receivers is examined and quantified. It is shown that certain choices of IF (f(IF)T = alpha(opt), 3 alpha(opt)/2, 2 alpha(opt), etc.) yield the same performance as infinite f(IF) wher e ce,pi is the optimum IF filter bandwidth when f(IF) = infinity. The approximate results presented in this paper are within 0.4 dB of exact results.