12 / 15
The experimental values of the synchronizer parameters
(
ε
v
, w
v
)
also
match the theoretical ones.
For the case under consideration, in the “Test” mode, it is recommended
to select the parameter values
ε
v
= 3
and
w
v
= 3
.
Analysis of the synchronizer in the “Capture” mode.
In the
“Capture” state, the synchronizer controls only the group of
n
characters in
the position where the synchronization code should be placed. If the number
of errors in code checking exceeds the threshold
ε
l
, the synchronizer returns
to the “Test” state.
The performance of the synchronizer in the “Capture” mode is estimated
by the relative value of information loss
DL
caused by any synchronization
failure in the presence of noise. The value
DL
is calculated using the
formula
DL
=
L
L
+
K
%
,
(18)
where
L
=
1
/
(1
−
q
) +
w
v
p
tc
+ (
JR
)
(19)
— is the average time required for correct detection of the synchronization
code;
J
=
1
1
−
p
fl
(20)
— is the average number of synchronization codes necessary for making
a decision on erroneous detection of the synchronization code in false
synchronization (
p
fl
— is the probability of the false synchronization code
in the “Capture” mode at the threshold value
ε
l
);
q, R, w
v
and
p
tc
are
calculated in the “Test” mode;
K
=
1
1
−
p
cl
(21)
Table 8
Values
DL
, % in the “Capture” synchronization state
Values
DL
, %, at
p
r
= 0
,
1
,
n
= 16
,
b
= 145
,
ε
s
= 1
,
ε
v
= 3
и
w
v
= 3
ε
l
J
K
L
DL
, %
0
1.000015
1.227
8.263
87.066
1
1.000259
2.060
8.263
80.039
2
1.002095
4.744
8.263
63.523
3
1.01075
14.618
8.263
36.113
4
1.03994
58.809
8.263
12.319
5
1.117389
303.328
8.263
2.651
6
1.294078
1982.025
8.263
0.415
128 ISSN 0236-3933. HERALD of the BMSTU. Series Instrument Engineering. 2015. No. 2