Ancho de Banda Equivalente de Ruido

 

6?:   II ZK]ZKTKAXFDINA KT]KDXZN-XK@]NZFC HK TITXK@FT

Hk fdukrhn dna cns hftns hk cf Gio. :.;:(f), cf hkasihfh kspkdtrfc T a (g )  sk pukhk kxprksfr ka cf gnr`f   | g + g d |   g + g d   | g √ g d |   g √ g d ⎨ ⎦ ) ⋋ έ( ) + kxp(√ ca : ) ⋋ έ( )⎫   T a ( g ) 0 F⎪ kxp( √ ca :

 

:J :J ⎧ J J Hk (:.6;4), cfs dnrrkspnahikatks hkasihfhks kspkdtrfcks T ad ( g )  n T as ( g )  skræa

⎤

| g |

T ad ( g ) 0 T as ( g ) 0 :F kxp( √ ca ca :

J

) ⋋ έ(

g  :J

) 

quk tikaka, ka kgkdtn, cf gnr`f `nstrfhf ka cf G Gio. io. :.;:(j). Cfs dnrrkspnahikatks pntkadifs sna

3 a : ( t ) 103 a :d ( t ) 103 a :s ( t ) 10 8F

∬

J

kxp(√ ca :

=

g  J

) hg

0

: ca :

FJ _  

:.9.8. Fadbn hk Jfahf Kquivfckatk hkc Zuihn  Fcouafs vkdks ks dnavkaikatk hkgiair kc –fadbn hk jfahf kquivfckatk hkc ruihn‐ hk ua sistk`f pfsfjfahf. Ka ua sistk`f duyf guadiôa hk trfasgkrkadif ks B(g) y duyf hkasihfh kspkdtrfc hk pntkadif hk ruihn f cf katrfhf ks T a ( g ) , cf pntkadif prn`khin hk ruihn f cf sfcihf vikak hfhf pnr (:.47), ks hkdir,

3 a :n (t ) 10

∬

∑

:

| B (g )| T a ( g )hg    

√∑

Ka cf `fynràf hk cns sistk`fs kc fadbn hk jfahf ks hk ua nrhka tfc quk ans pkr`itk supnakr quk kc ruihn f cf katrfhf ks jcfadn hk hkasihfh kspkdtrfc dnastfatk ο / : . Ka kstfs dnahidinaks,

3 a :n (t ) 10

ο

∬

∑

:

| B ( g )| hg  

: √∑

  :

Dnasihkrk Dnasih krk`ns `ns ffbnr bnrff ua sistk sistk`f `f ihkfc ihkfc pfsf pfsfjfa jfahf hf hk ofafa ofafadif dif hk hk pnt pntkad kadif if | B ( g )|`fx   y hk fadbn hk jfahf J A , Gio. :.;4(j). Cf pntkadif hk ruihn f su sfcihf skræ

3 a :n (t ) 10 οJ A | B ( g )|:`f  x  

(:.6;7)

Ti kstfs pntkadifs sna ioufcks, katnadks J A   skræ, pnr hkgiaidiôa, kc –fadbn hk jfahf kquivfckatk hkc ruihn‐ y vkahræ hfhn pnr J A

0

∬

∑

6 : :| B ( g ))||`fx

:

| B (g )| hg  

(:.6;?)

√∑

Kstfs hkgiaidinaks sk icustrfa ka cf Gio. :.;4(f) y (j). :

: | B (g ))||`fx

| B ( g )| )|

:

| B (g )| ) |`fx

J A

 Frkfs Ioufcks g

=

g d (j)  g d = (f) Gio. :.;4. Hkgiaidiôa hkc Fadbn hk Jfahf Kquivfckatk hkc Zuihn.

g 

E. Jridkön Jridkön @., @., Hr. Iao. -- ]rngksnr Xitucfr, [CF -- @érihf, Wkakzukcf

 

 

6?4 II ZK]ZKTKAXFDINA KT]KDXZN-XK@]NZFC HK TITXK@FT :

J A  ks kc fadbn fadbn hk jfahf jfahf hk ua sistk`f sistk`f ihkfc ihkfc pfsfjfahf pfsfjfahf hk o ofafad fafadif if h hkk pntkadi pntkadiff | B ( g )|`fx   quk hkefræ pfsfr cf `is`f pntkadif hk ruihn jcfadn quk kc sistk`f ka dukstiôa, ks hkdir, kc fadbn hk jfahf hk ruihn hk ua gictrn ihkfc ks kquivfckatk fc fadbn hk jfahf hk ua gictrn rkfc . Kstn sk icustrf

 

ka cf Gio. :.;4. Cfs kxprksinaks (:.6;7) y (:.6;?) sk fpcidfa tf`jiéa f sistk`fs pfsfjfen.

Kek`pcn :.44 Kc fadbn hk jfahf kquivfckatk hkc ruihn f `kauhn sk rkcfdinaf dna kc fadbn hk jfahf hk 4 hJ hk ua sistk`f. Dnasihkrk`ns kc gictrn pfsfjfen duyf guadiôa hk trfasgkrkadif ks

B (g ) 0

6= 6=

4

8

+ e:ύg 

J A   0

]krn

 . Kc fadbn hk jfahf kquiv kquivfckatk fckatk hkc ruihn ks, ka kstk dfsn,

6 )| :| B(=)|

:

∑

∬

| B( g )| ) |: hg    

√∑

6=

| B (g )| 0 6=

∬

∑

√∑

:

| B ( g ))|| hg 0 

y hk (:.6;?),

J A   0

7

∬

<   |B(=)|0 |B(=)|0 6= 6=