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Submitted By 1020874596
Words 408
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1

τ τ



HDB3
HDB 0.5 0 3 ) fS

________________________________________________________________________________________ -1-

τ = 0.5 TS

Ps (f ) = 2f s p(1 − p) | G(f ) |2 +f s | PG (o) |2 δ (f )
2

+ 2f s2 ∑ | PG ( mf s ) |2δ (f − mf s ) m =1



fS =
G(f)

1 TS

P

1

τ = 0.5 TS πf 1 sa ( ) G (f ) = 2fs 2f S
1 π 1 2 = 1 sa ( ) = ⋅ 2f S 2 2f S π / 2 π f S 2p 2 sin

π

Θ

G (f S ) =
S) =

∴ P (f
S

π2

δ (f − f S )
0.5 0.5 0 AMI HDB fS 0 1 0 3 0

HDB AMI fS 1

ω n = I p K o / 2πC17 , ζ = n 36 17

R36 C17 ωn 2
L

BL =
P

ωn (1 + 4ζ 2 ) 8ζ

μF

f

L

f R36= C17
3 3

μF =

F

ω n = 1.4 × 10 rad / s

ζ = 0.7

B L = 739.9 Hz

Q = 170.5 × 10 / B L = 230

________________________________________________________________________________________ -2-

11111 00000 10011010 10101 00000 11101100 01010 11111 00010011

11111 00000 10011010 00000 00000 01010111 10000 10000 11010111

1

0 ——

1

0

0 1
________________________________________________________________________________________ -3-

2DPSK 1 0 180 2PSK 2PSK 2PSK
º

1 0

2DPSK 2DPSK

2DPSK 2DPSK

180

º

2PSK 2PSK

________________________________________________________________________________________ -4-

fH 3 fH =18 6=108Hz fP =18 4=72Hz

fP

V1=12V V2=8V

ωn = d Kd Ko ( R25 + R68 )C11
25

ζ =

R68 C11 ωn 2
Ω
68

Ω

11

fn

n

ωn = fn =

2π × 18 × 6.5 = 111 rad ( 2 × 10 + 5 × 10 3 ) × 2.2 × 10 −6
4

ωn = 17.6Hz 2π

170.5

ς=

5 × 10 3 × 2.2 × 10 −6 × 111 = 0.6 2

2DPSK

÷2
2fC

Cos ω c t

− Cos ω c t
2fC

÷2

________________________________________________________________________________________ -5-

MU LPF AK BK

BK 2DPSK

________________________________________________________________________________________ -6-

NRZ DCO DCO

1

0 DCO NRZ

tC



f tC

ηTs

2πη
4π Δ f t c = 2πη tC NRZ DCO

∴t
DCO

c

=

η
2 Δf

πTC
1 0 M N DLF

mNTs = t c = m=

η
2Δf

η
2 NTsΔf

DCO DCO

3

3

AMI

HDB3

________________________________________________________________________________________ -7-

1 1 AMI 0 HDB3 HDB3 0 0 3 0

1

AMI 0.5

HDB3

AMI

0 0

DCO DCO 1 1

________________________________________________________________________________________ -8-

4

1 4

________________________________________________________________________________________ -9-

BD 7 5

NRZ

________________________________________________________________________________________ - 10 -

0 1 2 3 2DPSK LPF 4

K1 Ud MU LPF Vc LPF Vc MU

________________________________________________________________________________________ - 11 -

1

8KHz

192KHz

________________________________________________________________________________________ - 12 -

________________________________________________________________________________________ - 13 -

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