如果语句未在matlab图形中绘制,则X=0的值
试图从二进制输入绘制ask、fsk和psk调制图。psk和fsk调制图是正常的,但ask调制图似乎忽略了0值,并且没有绘制它们 尝试使用ask=sin(0);ask=楼梯(0);以及反转if-else语句如果语句未在matlab图形中绘制,则X=0的值,matlab,matlab-figure,Matlab,Matlab Figure,试图从二进制输入绘制ask、fsk和psk调制图。psk和fsk调制图是正常的,但ask调制图似乎忽略了0值,并且没有绘制它们 尝试使用ask=sin(0);ask=楼梯(0);以及反转if-else语句 prompt = 'Enter bit stream '; ff = 'Enter space frequency, f = '; ff2 = 'Enter mark frequency, f2 = '; x=input(prompt) f=input(ff) f2=input(ff2) n
prompt = 'Enter bit stream ';
ff = 'Enter space frequency, f = ';
ff2 = 'Enter mark frequency, f2 = ';
x=input(prompt)
f=input(ff)
f2=input(ff2)
nx=size(x,2);
for i=1:1:nx
t = i:0.01:i+1;
if x(i)==1
ask=sin(2*pi*f*t);
fsk=sin(2*pi*f2*t);
psk=sin(2*pi*f*t);
else
ask=0;
fsk=sin(2*pi*f*t);
psk=sin(2*pi*f*t+pi);
end
subplot(4,1,1);
stairs([x,x(end)]);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('Binary Input')
axis([1 nx+3 -2 2]);
subplot(4,1,2);
plot(t,ask);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('ASK Modulation')
axis([1 nx+3 -2 2]);
subplot(4,1,3);
plot(t,fsk);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('FSK Modulation')
axis([1 nx+3 -2 2]);
subplot(4,1,4);
plot(t,psk);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('PSK Modulation')
axis([1 nx+3 -2 2]);
end
在matlab中绘制时,数据的长度必须相同。在您的例子中,您正试图在整个t向量上绘制一个0,用于ask。您需要将其更改为零向量,如下所示:
prompt = 'Enter bit stream ';
ff = 'Enter space frequency, f = ';
ff2 = 'Enter mark frequency, f2 = ';
x=input(prompt)
f=input(ff)
f2=input(ff2)
nx=size(x,2);
for i=1:1:nx
t = i:0.01:i+1;
if x(i)==1
ask=sin(2*pi*f*t);
fsk=sin(2*pi*f2*t);
psk=sin(2*pi*f*t);
else
ask=zeros(length(t), 1);
fsk=sin(2*pi*f*t);
psk=sin(2*pi*f*t+pi);
end
subplot(4,1,1);
stairs([x,x(end)]);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('Binary Input')
axis([1 nx+3 -2 2]);
subplot(4,1,2);
plot(t,ask);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('ASK Modulation')
axis([1 nx+3 -2 2]);
subplot(4,1,3);
plot(t,fsk);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('FSK Modulation')
axis([1 nx+3 -2 2]);
subplot(4,1,4);
plot(t,psk);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('PSK Modulation')
axis([1 nx+3 -2 2]);
end
现在你会得到这样的结果:
prompt = 'Enter bit stream ';
ff = 'Enter space frequency, f = ';
ff2 = 'Enter mark frequency, f2 = ';
x=input(prompt)
f=input(ff)
f2=input(ff2)
nx=size(x,2);
for i=1:1:nx
t = i:0.01:i+1;
if x(i)==1
ask=sin(2*pi*f*t);
fsk=sin(2*pi*f2*t);
psk=sin(2*pi*f*t);
else
ask=zeros(length(t), 1);
fsk=sin(2*pi*f*t);
psk=sin(2*pi*f*t+pi);
end
subplot(4,1,1);
stairs([x,x(end)]);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('Binary Input')
axis([1 nx+3 -2 2]);
subplot(4,1,2);
plot(t,ask);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('ASK Modulation')
axis([1 nx+3 -2 2]);
subplot(4,1,3);
plot(t,fsk);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('FSK Modulation')
axis([1 nx+3 -2 2]);
subplot(4,1,4);
plot(t,psk);
hold on;
grid on;
ylabel('Amplitude')
xlabel('Time')
title('PSK Modulation')
axis([1 nx+3 -2 2]);
end