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10
P
fa
=
10
Figure 2.12. Probability of detection versus SNR. Swerling II.
.
For
n
P
>
2
the expression is
n
P
1
V
T
V
T
e
P
D
=
------------------------------------------------------------
+
1 Γ
I
(
V
T
,
n
P
1
)
+
K
0
(2.82)
(
1
+
n
P
SNR
⁄
2
)
n
P
(
2
)!
V
T
12
n
p
SNR
---------------------------------
n
p
×Γ
I
,
1
+
⁄
MATLAB Function Ðpd_swerling3.mÑ
The function
Ðpd_swerling3.mÑ
calculates for Swerling III type targets.
It is given in Listing 2.21 in Section 2.11. The syntax is as follows:
P
D
[pd] = pd_swerling3 (nfa, np, snr)
where
Symbol
Description
Units
Status
nfa
MarcumÓs false alarm number
none
input
np
number of integrated pulses
none
input
snr
dB
input
SNR
pd
probability of detection
none
output
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