Well, First let's write: = (we just factorized outside). Now, it remains to show that . This is easy because you should know that
and hence the above fractions becomes easily equal to one and therefore your result.
I have detached the image with the equation.
I dont understand the steps of calculation of the H(z) equation.
Can somebody explain how 2+2exp(j*pi/3) / (1-exp-j2*pi/3) in the numerator becomes 2exp(-j*pi*3) further down in the calculation.
I dont see this reduction!!
Well, First let's write: = (we just factorized outside). Now, it remains to show that . This is easy because you should know that
and hence the above fractions becomes easily equal to one and therefore your result.