How can I fix this error?

[James Tursa]

In the future, always post your code as text highlighted by the CODE button. Do not post your code as images because we can't copy & run pictures.

[Kwan Ho NG]

clear;

fs=10^4;

fc=1000; %carrier frequency

T=16*(1/500); %1/500 is the bit duration; 16bits data

Ts=1/fs; %Ts is the sampling duration for a given frequency = 0.0001s

N=T/Ts; %total number of samples for the 16 bit data

sin_wave= sin(2*pi*fc*(0:Ts:(N-1)*Ts));

cos_wave= cos(2*pi*fc*(0:Ts:(N-1)*Ts));

Ns=40;

data_I=[1 1 1 1 1 -1 1 -1];

data_Q=[-1 -1 1 1 -1 1 -1 -1];

sum_unm=8;

for i=1:sum_unm

for j=1:Ns

data_I_exit((i-1)*Ns+j))=data_I(i);

data_Q_exit((i-1)*Ns+j))=data_Q(i);

end;

end;

for i=1:N

out_QPSK(i)=data_I_exit(i)*cos_wave(i)+data_I_exit(i)+cos_wave(i);

end;

x=0:Ts:T-Ts

plot(x,out_QPSK)

Answer 1

[James Tursa]

Delete the extra closing parentheses. I.e., delete the paren where the red underline is.