【自适应FSK】数字FSK调制信号的自适应解调的MATLAB仿真

1.软件版本

MATLAB2013b

2.本算法理论知识

3.核心代码

NUMS = 20000;
Bits = round(rand(1,NUMS)>=0.5);
f1   = 1;
f2   = 2;
Scale= 50;
t    = 0:1/Scale:1-1/Scale;

As   = 1;

%FSK
Bits0  = sin(2*pi*f1*t);
Bits0  = Bits0/sqrt(sum(Bits0.^2));

Bits1  = sin(2*pi*f2*t);
Bits1  = Bits1/sqrt(sum(Bits1.^2));

fsk    = [];
for i=1:NUMS
    if Bits(i)==1
       fsk=[fsk Bits1];
    else
       fsk=[fsk Bits0];
    end
end

figure
subplot(211)
stairs(0:10,[Bits(1:10) Bits(10)],'linewidth',1.5)
axis([0 10 -0.5 1.5])
title('Message Bits');grid on
subplot(212)
tb=0:1/Scale:10-1/Scale;
plot(tb, fsk(1:10*Scale),'r','linewidth',1.5)
title('FSK调制');grid on
.....................

 4.操作步骤与仿真结论

 

 

5.参考文献

[1]付柏成, 赵知劲, 赵治栋. 脉冲噪声下数字调制信号的自适应解调[J]. 现代电子技术, 2008, 31(23):5.
A01-499