delayseq works on a vector, e,g.,
>> delayseq([1;0;1;0;1;0;1;0;1;0],0.004,250)
>> ans =
0
1
0
1
0
1
0
1
0
1
while if I under your model correctly, the pulse samples are generated one at a time, that's why the function is not providing the correct answer. You can consider adding a buffer in between to convert the signal to vector, but then you need to live with the fact that there is a latency due to the buffering at the output.
HTH
