08-16-2017, 09:15 PM
TELECOMMUNICATION THEORY
[attachment=17059]
Error Rate Analysis of Optical Receivers with
Fabry-Perot Optical Filter
G ran Einarsson and Idelfonso Tafur Monroy
A complete analytic solution in form of the
moment-generating function is presented
for the statistical distribution of the decision
variable of an on-off system with a Fabry-
Perot optical filter. The results include ASE
noise, photodetector shot noise and dark
TELECOMMUNICATION THEORY
Filter Bandwidth
current together with thermal noise in the
decision circuit. The influence of intersymbol
interference is incorporated into the
analysis and the optimal bandwidth of the
optical filter is determined. It is shown that
an equalizing electrical postdetection filter
may make a significant improvement in performance.
The analysis is extended to cover
receivers with an arbitrary optical filter
and arbitrary postdetection filtering by making
use of a Gaussian approximation.
Introduction
Transmission of information by quantum
physics has received considerable attention
in the last decade and several interesting experiments
are reported in the literature. The
public relation department of IBM claim that
its research department have been able to
teleport Hungarian goulach between United
States and Japan.
Theory
Our teleportation method is based on entangled
e-mail messages which is a pair of
e-mail data files with identical messages
generated by a single operation. The files
contain binary information yes or no each
with probability 1/2. An important feature
of entangled e-mail is that there is no way of
knowing the information before the data
files are read out.