problem finding 16 point DFT using two 8 point FFT (Divide and combine algorithm) MATLAB
I will only give insight how to work on above problem but I won't give you the matlab code it can solved using two methods.
Method_1:- using DIT FFT algorithm hear inputs given in bit reversal order and output is multiplied with twiddle factor$w_n^k,where  k=0,1,2..,7$


So you use the same for your problem.
Method_2:- using DIF FFT algorithm hear the inputs are given in normal order at the output the butterfly's used are 2X2 &amp; output is taken in bit reversal order like below