blob: ef8dc9d8016bb1fb113214c3ad8b239da903002a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
// Example 10.7
// Calculation of the variance of (a) linear phase noise, (b) nonlinear phase noise at the receiver
// Page no 477
clc;
clear;
close;
//Given data
alpha=0.0461; // Loss coeffient
na=20; // No of amplifiers
L=80; // Amplifier spacing
tb=25*10^-12; // Pulse width
P=2*10^-3; // Peak power
c=3*10^8; // Velocity of light
lambda=1550*10^-9;
n=1.5; // Spontaneous emission factor
h=6.626*10^-34; // Planck constant
r0=1.1*10^-3; // Nonlinear coefficient
// a) linear phase noise at the receiver
G=exp(alpha*L);
f=c/lambda;
R=h*f*(G-1)*n;
E=P*tb;
rl=(na*R)/(2*E);
rl=rl*10^3;
// (b) nonlinear phase noise at the receiver
Le=(1-exp(-alpha*L))/alpha;
rnl=((na-1)*na*(2*na-1)*R*E*r0^2*Le^2)/(3*tb^2);
rnl=rnl*10^9;
t=rl+rnl;
//Displaying results in the command window
printf("\n The linear phase noise at the receiver = %0.2f rad^2 ",rl);
printf("\n The nonlinear phase noise at the receiver = %0.2f rad^2 ",rnl);
printf("\n The total variance = %0.2f X 10^-3 rad^2 ",t);
|
