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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
sampled coherent receivers [43, 44] through off-line DSP. It is expected that
polarization-diversity DSCOR can similarly provide the EPMDC function. To
compensate for PMD, we can rewrite Eqn (4.38) so that the coef ficients h
ij
of
the matrix H are replaced by FIR filters:
z
1
kðÞ
z
2
kðÞ

=
X
B=2
l = B=2
h
11
lðÞ h
12
lðÞ
h
21
lðÞ h
22
lðÞ

y
1
k þlðÞ
y
2
k þlðÞ

;
(4.42)
k is the sampling time index. To eff ectively compensate for PMD, the FIR filter
length B þ1 of the equalization filters h
ij
(l) should be longer than the maximum
differential group delay divided by the sampling time T
s
.
The constant modulus algorithm using an unrestricted full FIR filter in place of
each of the matrix coefficients can be potentially simplified by accepting certain
performance restrictions, ...
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Publisher Resources

ISBN: 9780123741721