please check this code .. im getting error that frequency should be less than Fs/2....

   clear; clc;

M=2^50;
freq_sep=100;
nsamp=6;

y=wavread('voice','native');
x=fi(y);
z=bin(x);
m=str2num(z); %#ok<ST2NM>

fsk_mod=fskmod(m,M,freq_sep,nsamp);
noise=awgn(fsk_mod,0);
fsk_demod=fskdemod(noise,M,freq_sep,nsamp);
[num,rate]=biterr(fsk_demod);
output=wavwrite('fsk_demod');
sound(output)

Answer 1

[Walter Roberson]

wavwrite() requires a minimum of two parameters, and never returns a value.

[Mubasher]

Does M in fskmod is same as the M for M-array modulation?