Simulink Sample-Time and other things

Hi,

first sorry for my english, not the best.

My problem:

- I have a vector with 160 elements. So I multiply the first half (first 80) with the second half. - The vector elements are complex numbers, so i want to have the angle between number one and numer 81, number 2 and number 82,... for this i used the matlab command "angle" - this angle is a phase difference. Now i want to convert it in a frequency. For this I have the following formula:

f = phase / (2*pi*(delta_T))

where delta_T is the time differenz between the to half, for example between vector element 1 and element 81.

I search for the right approach but I have no idea what is delta_T.

Thx for andy help.