
347Simulation Tools forBroadband Passive Optical Networks
Dispgen1
Dispgen2
Dispgen4
Filtered signal with dispersion2
Dispgen
Product1
Product2
Product3
Constant
Variable
integer delay
Detection
S-Function
S-Function B
In S/H
Sample
and hold
Scope2
Scope5
Disp_plane
Disp_loss
u0
u0
r0
r0
p0
n0
pp0
nn0
Out1
Out2
Out3
Out4
In
In1
In2
Delay
Out
z
–i
0
M-Ph
to Cmx
|u|
|u|
Complex phase
shift
In
Ph
Complex
phase shift
Cmx to
M-Ph
Cmx to
M-Ph1
u
Out1
Out2
1
2
3
|u|
In1
×
×
×
1
y0
y0
u
u
FIGURE 12.8 The CD block scheme.
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–0.1
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
×10
1
0.8
0.6
0.4
0.2
0
0 0.1 0.2 0.3 0.4 0.60.5 0.7 0.8 0.9 1
t [s]
(a)
×10
–9
FIGURE 12.9 The OOK ltered signal ( ...