Прикладные математические методы в статистической радиотехнике. Федосов В.П. - 61 стр.

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ɉɪɢ ɜɵɩɨɥɧɟɧɢɢ ɞɨɤɚɡɚɧɧɨɝɨ ɭɫɥɨɜɢɹ ɦɢɧɢɦɚɥɶɧɨɟ ɡɧɚɱɟɧɢɟ H
2
(t) ɛɭɞɟɬ
ɪɚɜɧɨ
2
min
H
(t) = B
[
(t,t) -
³
f
f
³
f
f
h*(t,u)h*(t,v) B
x
(u,v)dudv ɢɥɢ, ɫ ɭɱɟɬɨɦ (14.2),
ɛɭɞɟɬ ɪɚɜɧɚ
2
min
H
(t)=B
[
(t,t) -
³
f
f
h*(t,u)B
x
(t,u)du. ɋɪɚɜɧɢɜɚɹ ɢɧɬɟɝɪɚɥ ɜ ɩɪɚɜɨɣ
ɱɚɫɬɢ ɷɬɨɣ ɮɨɪɦɭɥɵ ɢ ɜɵɪɚɠɟɧɢɟ (14.2), ɦɨɠɧɨ ɜɵɪɚɠɟɧɢɟ ɞɥɹ
L
mi n
2
(t) ɩɟɪɟɩɢ-
ɫɚɬɶ ɬɚɤ:
2
min
H
(t) = B
[
(t)-B
[*
(
t), ɬ.ɟ. ɦɢɧɢɦɚɥɶɧɨɟ ɡɧɚɱɟɧɢɟ ɫɪɟɞɧɟɝɨ ɤɜɚɞɪɚɬɚ
ɨɲɢɛɤɢ ɪɚɜɧɨ ɪɚɡɧɨɫɬɢ ɫɪɟɞɧɢɯ ɤɜɚɞɪɚɬɨɜ ɨɰɟɧɢɜɚɟɦɨɝɨ ɩɪɨɰɟɫɫɚ ɢ ɟɝɨ ɨɰɟɧɤɢ.
Ⱦɥɹ ɫɬɚɰɢɨɧɚɪɧɵɯ ɋɉ ɭɪɚɜɧɟɧɢɟ (14.2) ɩɪɟɨɛɪɚɡɭɟɬɫɹ ɤ ɜɢɞɭ
B
x[
(W)=
³
f
f
-
x
y-((y)B*h
W
. ɗɬɨ ɢɧɬɟɝɪɚɥɶɧɨɟ ɭɪɚɜɧɟɧɢɟ ɧɚɡɵɜɚɸɬ ɭɪɚɜɧɟɧɢɟɦ
ȼɢɧɟɪɚ - ɏɨɩɮɚ. ȿɝɨ ɪɟɲɟɧɢɟ ɩɨɡɜɨɥɹɟɬ ɧɚɣɬɢ ɢɫɤɨɦɭɸ ɢɦɩɭɥɶɫɧɭɸ ɯɚɪɚɤɬɟɪɢ-
ɫɬɢɤɭ. Ɍɚɤ ɤɚɤ ɩɪɚɜɚɹ ɱɚɫɬɶ ɭɪɚɜɧɟɧɢɹ ȼɢɧɟɪɚ - ɏɨɩɮɚ ɟɫɬɶ ɫɜɟɪɬɤɚ, ɤɨɬɨɪɨɣ ɧɚ
ɱɚɫɬɨɬɧɨɣ ɨɫɢ ɫɨɨɬɜɟɬɫɬɜɭɟɬ ɩɪɨɢɡɜɟɞɟɧɢɟ ɩɪɟɨɛɪɚɡɨɜɚɧɢɣ Ɏɭɪɶɟ ɨɬ ɫɜɟɪɬɵɜɚɟ-
ɦɵɯ ɮɭɧɤɰɢɣ, ɬɨ ɦɨɠɧɨ ɡɚɩɢɫɚɬɶ:
F
x[
(Z)=F
[
(Z)+F
[K
(Z)=k*(jZ)F
x
(Z),
ɨɬɤɭɞɚ
k*(jZ)=[F
[
(Z)+F
[K
(Z)]/F
x
(Z). ɉɨɞɫɬɚɜɢɦ ɷɬɨ ɭɫɥɨɜɢɟ ɜ ɮɨɪɦɭɥɭ ɞɥɹ
2
min
H
,
ɧɨ ɜɵɪɚɠɟɧɧɭɸ ɜ ɫɩɟɤɬɪɚɥɶɧɨɣ ɨɛɥɚɫɬɢ, ɩɨɥɭɱɢɦ ɞɥɹ ɫɬɚɰɢɨɧɚɪɧɵɯ ɋɉ
2
min
H
=(2
S)
-1
³
f
f
[F
[
(Z)F
x
(Z)-|F
x[
(Z)|
2
]/F
x
(Z)dZ. ȿɫɥɢ ɩɪɨɰɟɫɫɵ [(t) ɢ K(t) ɧɟɡɚɜɢɫɢɦɵ, ɬɨ
F
[K
(Z) = F
K[
(Z) = 0 ɢ ɜɵɪɚɠɟɧɢɟ ɞɥɹ k*(jZ) ɭɩɪɨɳɚɟɬɫɹ:
k*(jZ)=F
[
(Z)/[F
[
(Z)+F
K
(Z)].
Ɍɨɝɞɚ
2
min
H
=(2S)
-1
³
f
0
{F
[
(Z)F
K
(Z)/[F
[
(Z)+F
K
(Z)]}dZ. Ⱥɧɚɥɢɡ ɷɬɨɝɨ ɜɵɪɚɠɟɧɢɹ
ɩɨɤɚɡɵɜɚɟɬ, ɱɬɨ ɨɲɢɛɤɚ ɪɚɜɧɚ ɧɭɥɸ ɬɨɥɶɤɨ ɜ ɬɨɦ ɫɥɭɱɚɟ, ɟɫɥɢ ɫɩɟɤɬɪɵ ɩɪɨɰɟɫ-
ɫɨɜ
[(t) ɢ K(t) ɧɟ ɩɟɪɟɤɪɵɜɚɸɬɫɹ, ɬ.ɟ. ɜɨɡɦɨɠɧɨ ɪɚɡɞɟɥɟɧɢɟ ɥɢɧɟɣɧɵɦ ɮɢɥɶɬɪɨɦ
ɫɩɟɤɬɪɨɜ ɫɢɝɧɚɥɚ ɢ ɩɨɦɟɯɢ.
Ⱦɪɭɝɨɣ ɡɚɞɚɱɟɣ ɫɢɧɬɟɡɚ ɥɢɧɟɣɧɵɯ ɮɢɥɶɬɪɨɜ ɹɜɥɹɟɬɫɹ ɫɢɧɬɟɡ ɫɨɝɥɚɫɨɜɚɧɧɵɯ
ɮɢɥɶɬɪɨɜ. ɗɬɚ ɡɚɞɚɱɚ ɪɚɫɫɦɚɬɪɢɜɚɟɬɫɹ ɜ ɤɭɪɫɟ "Ɋɚɞɢɨɬɟɯɧɢɱɟɫɤɢɟ ɰɟɩɢ ɢ ɫɢɝɧɚ-
ɥɵ".
15. ɗɅȿɆȿɇɌɕ ɌȿɈɊɂɂ ɄɅȺɋɋɂɎɂɄȺɐɂɂ
15.1. ɏɚɪɚɤɬɟɪɢɫɬɢɤɚ ɩɪɨɛɥɟɦɵ ɤɥɚɫɫɢɮɢɤɚɰɢɢ