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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
4.4.3 Detection of m-ary DPSK
The DSCOR can be used to receive high spectral-efficiency m-ary DPSK signals
[17, 36]. As described previously, the log
2
(m) data tributaries of an m-ary DPSK
signal are usually obtained from m/2 decision variables associated with m/4 ODI
pairs having the following orthogonal phase offsets,
m
;
m
2

;
3
m
;
3
m
2

;:::;
ðm=21Þ
m
;
m

. With the assistance of DSP, we show below that the last (m/2–2)
decision variables can be derived by linear combinations of the first two decision
variables, u
I
and u
Q
. This dramatically reduces the optical complexity associated
with the detection of m-ary DPSK. The decision variables associ ...
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Publisher Resources

ISBN: 9780123741721