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Optical Fiber Telecommunications VB, 5th Edition
book

Optical Fiber Telecommunications VB, 5th Edition

by Ivan Kaminow, Tingye Li, Alan E. Willner
July 2010
Intermediate to advanced content levelIntermediate to advanced
928 pages
33h 42m
English
Academic Press
Content preview from Optical Fiber Telecommunications VB, 5th Edition
Receiver Impairments in Direct-Detection DBPSK
One significant impairment in DBPSK receiver performance is the phase error due
to nonexact phase matching between the two arms of the ODI. The phase error
usually comes from temperature-induced phase mismatch or laser frequency offset
from the passband center of the ODI. With the consideration of the phase error, we
have for direct-detection DBPSK with polarization filtering [4]
BER
DBPSK 1p
= Qða; bÞ
1
2
e
a
2
þb
2
ðÞ
=2
I
0
ðabÞ;
a =
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi
2SNR
b
p
sinð
e
=2Þ
jj
; b =
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi
2SNR
b
p
cosð
e
=2Þ
jj
;
(4.12)
where
e
is the phase error, and I
0
(x) is the zeroth-order modified Bessel function
of the first kind,
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Publisher Resources

ISBN: 9780123741721